diff --git a/benchmarks/styles.cpp b/benchmarks/styles.cpp
index b9d26500..58071a9c 100644
--- a/benchmarks/styles.cpp
+++ b/benchmarks/styles.cpp
@@ -22,7 +22,9 @@
 // @author: see AUTHORS file
 
 #include <chrono>
+#include <string>
 #include <iostream>
+#include <sstream> 
 #include <iterator>
 #include <random>
 
@@ -41,119 +43,135 @@ std::size_t random_index(std::size_t max)
     return dis(gen);
 }
 
-std::vector<xlnt::style> generate_all_styles(xlnt::workbook &wb)
+void generate_all_formats(xlnt::workbook &wb, std::vector<xlnt::format>& formats)
 {
-    std::vector<xlnt::style> styles;
+	const auto vertical_alignments = std::vector<xlnt::vertical_alignment>
+	{
+		xlnt::vertical_alignment::center,
+		xlnt::vertical_alignment::justify,
+		xlnt::vertical_alignment::top,
+		xlnt::vertical_alignment::bottom
+	};
 
-    const auto vertical_alignments = std::vector<xlnt::vertical_alignment>
-    {
-        xlnt::vertical_alignment::center,
-        xlnt::vertical_alignment::justify,
-        xlnt::vertical_alignment::top,
-        xlnt::vertical_alignment::bottom
-    };
+	const auto horizontal_alignments = std::vector<xlnt::horizontal_alignment>
+	{
+		xlnt::horizontal_alignment::center,
+		xlnt::horizontal_alignment::center_continuous,
+		xlnt::horizontal_alignment::general,
+		xlnt::horizontal_alignment::justify,
+		xlnt::horizontal_alignment::left,
+		xlnt::horizontal_alignment::right
+	};
 
-    const auto horizontal_alignments = std::vector<xlnt::horizontal_alignment>
-    {
-        xlnt::horizontal_alignment::center,
-        xlnt::horizontal_alignment::center_continuous,
-        xlnt::horizontal_alignment::general,
-        xlnt::horizontal_alignment::justify,
-        xlnt::horizontal_alignment::left,
-        xlnt::horizontal_alignment::right
-    };
+	const auto font_names = std::vector<std::string>
+	{
+		"Calibri",
+		"Tahoma",
+		"Arial",
+		"Times New Roman"
+	};
 
-    const auto font_names = std::vector<std::string>
-    {
-        "Calibri",
-        "Tahoma",
-        "Arial",
-        "Times New Roman"
-    };
+	const auto font_sizes = std::vector<double>
+	{
+		11.,
+		13.,
+		15.,
+		17.,
+		19.,
+		21.,
+		23.,
+		25.,
+		27.,
+		29.,
+		31.,
+		33.,
+		35.
+	};
 
-    const auto font_sizes = std::vector<double>
-    {
-        11.,
-        13.,
-        15.,
-        17.,
-        19.,
-        21.,
-        23.,
-        25.,
-        27.,
-        29.,
-        31.,
-        33.,
-        35.
-    };
+	const auto underline_options = std::vector<xlnt::font::underline_style>
+	{
+		xlnt::font::underline_style::single,
+		xlnt::font::underline_style::none
+	};
 
-    const auto underline_options = std::vector<xlnt::font::underline_style>
-    {
-        xlnt::font::underline_style::single,
-        xlnt::font::underline_style::none
-    };
+	for (auto vertical_alignment : vertical_alignments)
+	{
+		for (auto horizontal_alignment : horizontal_alignments)
+		{
+			for (auto name : font_names)
+			{
+				for (auto size : font_sizes)
+				{
+					for (auto bold : { true, false })
+					{
+						for (auto underline : underline_options)
+						{
+							for (auto italic : { true, false })
+							{
+								auto fmt = wb.create_format();
 
-    std::size_t index = 0;
+								xlnt::font f;
+								f.name(name);
+								f.size(size);
+								f.italic(italic);
+								f.underline(underline);
+								f.bold(bold);
+								fmt.font(f);
 
-    for (auto vertical_alignment : vertical_alignments)
-    {
-        for (auto horizontal_alignment : horizontal_alignments)
-        {
-            for (auto name : font_names)
-            {
-                for (auto size : font_sizes)
-                {
-                    for (auto bold : { true, false })
-                    {
-                        for (auto underline : underline_options)
-                        {
-                            for (auto italic : { true, false })
-                            {
-                                auto s = wb.create_style(std::to_string(index++));
+								xlnt::alignment a;
+								a.vertical(vertical_alignment);
+								a.horizontal(horizontal_alignment);
+								fmt.alignment(a);
 
-                                xlnt::font f;
-                                f.name(name);
-                                f.size(size);
-                                f.italic(italic);
-                                f.underline(underline);
-                                f.bold(bold);
-                                s.font(f);
-
-                                xlnt::alignment a;
-                                a.vertical(vertical_alignment);
-                                a.horizontal(horizontal_alignment);
-                                s.alignment(a);
-
-                                styles.push_back(s);
-                            }
-                        }
-                    }
-                }
-            }
-        }
-    }
-
-    return styles;
+								formats.push_back(fmt);
+							}
+						}
+					}
+				}
+			}
+		}
+	}
 }
 
-xlnt::workbook non_optimized_workbook(int n)
+
+xlnt::workbook non_optimized_workbook_formats(int rows_number, int columns_number)
 {
-    xlnt::workbook wb;
-    auto styles = generate_all_styles(wb);
+	using xlnt::benchmarks::current_time;
 
-    for(int idx = 1; idx < n; idx++)
-    {
-        auto worksheet = wb[random_index(wb.sheet_count())];
-        auto cell = worksheet.cell(xlnt::cell_reference(1, (xlnt::row_t)idx));
-        cell.value(0);
-        cell.style(styles.at(random_index(styles.size())));
-    }
+	xlnt::workbook wb;
+	std::vector<xlnt::format> formats;
+	auto start = current_time();
 
-    return wb;
+	generate_all_formats(wb, formats);
+
+	auto elapsed = current_time() - start;
+
+	std::cout << "elapsed " << elapsed / 1000.0 << ". generate_all_formats. number of unique formats " << formats.size() << std::endl;
+
+	start = current_time();
+	auto worksheet = wb[random_index(wb.sheet_count())];
+	auto cells_proceeded = 0;
+	for (int row_idx = 1; row_idx <= rows_number; row_idx++)
+	{
+		for (int col_idx = 1; col_idx <= columns_number; col_idx++)
+		{
+			auto cell = worksheet.cell(xlnt::cell_reference((xlnt::column_t)col_idx, (xlnt::row_t)row_idx));
+			std::ostringstream string_stm;
+			string_stm << "Col: " << col_idx << "Row: " << row_idx;
+			cell.value(string_stm.str());
+			cell.format(formats.at(random_index(formats.size())));
+			cells_proceeded++;
+		}
+	}
+
+	elapsed = current_time() - start;
+
+	std::cout << "elapsed " << elapsed / 1000.0 << ". set values and formats for cells. cells proceeded " << cells_proceeded << std::endl;
+
+	return wb;
 }
 
-void to_profile(xlnt::workbook &wb, const std::string &f, int n)
+void to_save_profile(xlnt::workbook &wb, const std::string &f)
 {
     using xlnt::benchmarks::current_time;
 
@@ -161,17 +179,72 @@ void to_profile(xlnt::workbook &wb, const std::string &f, int n)
     wb.save(f);
     auto elapsed = current_time() - start;
 
-    std::cout << "took " << elapsed / 1000.0 << "s for " << n << " styles" << std::endl;
+    std::cout << "elapsed " << elapsed / 1000.0 << ". save workbook." << std::endl;
+}
+
+void to_load_profile(xlnt::workbook &wb, const std::string &f)
+{
+	using xlnt::benchmarks::current_time;
+	
+	auto start = current_time();	
+	wb.load(f);
+	auto elapsed = current_time() - start;
+
+	std::cout << "elapsed " << elapsed / 1000.0 << ". load workbook." << std::endl;
+}
+
+void read_formats_profile(xlnt::workbook &wb, int rows_number, int columns_number)
+{
+	using xlnt::benchmarks::current_time;
+
+	std::vector<std::string> values;
+	std::vector<xlnt::format> formats;
+	auto start = current_time();
+	auto worksheet = wb[random_index(wb.sheet_count())];
+	for (int row_idx = 1; row_idx <= rows_number; row_idx++)
+	{
+		for (int col_idx = 1; col_idx <= columns_number; col_idx++)
+		{
+			auto cell = worksheet.cell(xlnt::cell_reference((xlnt::column_t)col_idx, (xlnt::row_t)row_idx));
+			values.push_back(cell.value<std::string>());
+			formats.push_back(cell.format());
+		}
+	}
+
+	auto elapsed = current_time() - start;
+
+	std::cout << "elapsed " << elapsed / 1000.0 << ". read values and formats for cells. values count " << values.size() 
+		<< ". formats count " << formats.size() << std::endl;
 }
 
 } // namespace
 
-int main()
+int main(int argc, char * argv[])
 {
-    int n = 10000;
-    auto wb = non_optimized_workbook(n);
-    std::string f = "temp.xlsx";
-    to_profile(wb, f, n);
+    int rows_number = 1000;
+	int columns_number = 10;
+
+	try 
+	{
+		if (argc > 1)
+			rows_number = std::stoi(argv[1]);
+
+		if (argc > 2)
+			columns_number = std::stoi(argv[2]);
+
+		std::cout << "started. number of rows " << rows_number << ", number of columns " << columns_number << std::endl;
+		auto wb = non_optimized_workbook_formats(rows_number, columns_number);
+		auto f = "temp-formats.xlsx";
+		to_save_profile(wb, f);
+
+		xlnt::workbook load_formats_wb;
+		to_load_profile(load_formats_wb, f);
+		read_formats_profile(load_formats_wb, rows_number, columns_number);
+	}
+	catch(std::exception& ex)
+	{
+		std::cout << "failed. " << ex.what() << std::endl;
+	}
 
     return 0;
 }
diff --git a/include/xlnt/cell/rich_text.hpp b/include/xlnt/cell/rich_text.hpp
index 85bbc29a..31cb2790 100644
--- a/include/xlnt/cell/rich_text.hpp
+++ b/include/xlnt/cell/rich_text.hpp
@@ -48,6 +48,11 @@ public:
     /// </summary>
     rich_text(const std::string &plain_text);
 
+    /// <summary>
+    /// Constructs a rich text object from other
+    /// </summary>
+    rich_text(const rich_text &other);
+
     /// <summary>
     /// Constructs a rich text object with the given text and font.
     /// </summary>
@@ -89,6 +94,11 @@ public:
     /// </summary>
     void add_run(const rich_text_run &t);
 
+    /// <summary>
+    /// Copies rich text object from other
+    /// </summary>
+    rich_text& operator=(const rich_text &rhs);
+
     /// <summary>
     /// Returns true if the runs that make up this text are identical to those in rhs.
     /// </summary>
@@ -97,7 +107,7 @@ public:
     /// <summary>
     /// Returns true if the runs that make up this text are identical to those in rhs.
     /// </summary>
-    bool operator!=(const rich_text &rhs) const;    
+    bool operator!=(const rich_text &rhs) const;
 
     /// <summary>
     /// Returns true if this text has a single unformatted run with text equal to rhs.
@@ -116,4 +126,20 @@ private:
     std::vector<rich_text_run> runs_;
 };
 
+class XLNT_API rich_text_hash
+{
+public:
+    std::size_t operator()(const rich_text& k) const
+    {
+        std::size_t res = 0;
+
+        for (auto r : k.runs())
+        {
+            res ^= std::hash<std::string>()(r.first);
+        }
+
+        return res;
+    }
+};
+
 } // namespace xlnt
diff --git a/include/xlnt/styles/color.hpp b/include/xlnt/styles/color.hpp
index db35e6ef..24021452 100644
--- a/include/xlnt/styles/color.hpp
+++ b/include/xlnt/styles/color.hpp
@@ -101,7 +101,7 @@ public:
 
     /// <summary>
     /// Constructs an RGB color from red, green, and blue values in the range 0 to 255
-	/// plus an optional alpha which defaults to fully opaque.
+    /// plus an optional alpha which defaults to fully opaque.
     /// </summary>
     rgb_color(std::uint8_t r, std::uint8_t g, std::uint8_t b, std::uint8_t a = 255);
 
@@ -116,17 +116,17 @@ public:
     std::uint8_t red() const;
 
     /// <summary>
-	/// Returns a byte representing the red component of this color
+    /// Returns a byte representing the red component of this color
     /// </summary>
     std::uint8_t green() const;
 
     /// <summary>
-	/// Returns a byte representing the blue component of this color
+    /// Returns a byte representing the blue component of this color
     /// </summary>
     std::uint8_t blue() const;
 
     /// <summary>
-	/// Returns a byte representing the alpha component of this color
+    /// Returns a byte representing the alpha component of this color
     /// </summary>
     std::uint8_t alpha() const;
 
@@ -136,7 +136,7 @@ public:
     std::array<std::uint8_t, 3> rgb() const;
 
     /// <summary>
-	/// Returns the red, green, blue, and alpha components of this color separately in an array in that order.
+    /// Returns the red, green, blue, and alpha components of this color separately in an array in that order.
     /// </summary>
     std::array<std::uint8_t, 4> rgba() const;
 
@@ -174,42 +174,42 @@ public:
     static const color white();
 
     /// <summary>
-	/// Returns the color \#ff0000
+    /// Returns the color \#ff0000
     /// </summary>
     static const color red();
 
     /// <summary>
-	/// Returns the color \#8b0000
+    /// Returns the color \#8b0000
     /// </summary>
     static const color darkred();
 
     /// <summary>
-	/// Returns the color \#00ff00
+    /// Returns the color \#00ff00
     /// </summary>
     static const color blue();
 
     /// <summary>
-	/// Returns the color \#008b00
+    /// Returns the color \#008b00
     /// </summary>
     static const color darkblue();
 
     /// <summary>
-	/// Returns the color \#0000ff
+    /// Returns the color \#0000ff
     /// </summary>
     static const color green();
 
     /// <summary>
-	/// Returns the color \#00008b
+    /// Returns the color \#00008b
     /// </summary>
     static const color darkgreen();
 
     /// <summary>
-	/// Returns the color \#ffff00
+    /// Returns the color \#ffff00
     /// </summary>
     static const color yellow();
 
     /// <summary>
-	/// Returns the color \#cccc00
+    /// Returns the color \#cccc00
     /// </summary>
     static const color darkyellow();
 
@@ -249,8 +249,8 @@ public:
     void auto_(bool value);
 
     /// <summary>
-	/// Returns the internal indexed color representing this color. If this is not an RGB color,
-	/// an invalid_attribute exception will be thrown.
+    /// Returns the internal indexed color representing this color. If this is not an RGB color,
+    /// an invalid_attribute exception will be thrown.
     /// </summary>
     const rgb_color& rgb() const;
 
@@ -262,7 +262,7 @@ public:
 
     /// <summary>
     /// Returns the internal indexed color representing this color. If this is not an indexed color,
-	/// an invalid_attribute exception will be thrown.
+    /// an invalid_attribute exception will be thrown.
     /// </summary>
     const indexed_color& indexed() const;
 
@@ -273,8 +273,8 @@ public:
     indexed_color &indexed();
 
     /// <summary>
-	/// Returns the internal indexed color representing this color. If this is not a theme color,
-	/// an invalid_attribute exception will be thrown.
+    /// Returns the internal indexed color representing this color. If this is not a theme color,
+    /// an invalid_attribute exception will be thrown.
     /// </summary>
     const theme_color& theme() const;
 
@@ -294,15 +294,15 @@ public:
     /// </summary>
     void tint(double tint);
 
-    /// <summary>
-    /// Returns true if this color is equivalent to other
-    /// </summary>
-    bool operator==(const color &other) const;
+	/// <summary>
+	/// Returns true if this color is equivalent to other
+	/// </summary>
+	bool operator==(const color &other) const;
 
     /// <summary>
     /// Returns true if this color is not equivalent to other
     /// </summary>
-	bool operator!=(const color &other) const;
+    bool operator!=(const color &other) const;
 
 private:
     /// <summary>
@@ -321,12 +321,12 @@ private:
     rgb_color rgb_;
 
     /// <summary>
-	/// The internal RGB color. Only valid when this color has a type of indexed
+    /// The internal RGB color. Only valid when this color has a type of indexed
     /// </summary>
     indexed_color indexed_;
 
     /// <summary>
-	/// The internal RGB color. Only valid when this color has a type of theme
+    /// The internal RGB color. Only valid when this color has a type of theme
     /// </summary>
     theme_color theme_;
 
diff --git a/include/xlnt/utils/optional.hpp b/include/xlnt/utils/optional.hpp
index 8248ebd2..8677f24b 100644
--- a/include/xlnt/utils/optional.hpp
+++ b/include/xlnt/utils/optional.hpp
@@ -314,4 +314,4 @@ private:
 #undef XLNT_NOEXCEPT_VALUE_COMPAT
 #endif
 
-} // namespace xlnt
\ No newline at end of file
+} // namespace xlnt
diff --git a/include/xlnt/workbook/workbook.hpp b/include/xlnt/workbook/workbook.hpp
index 7b98f622..d92cf2b2 100644
--- a/include/xlnt/workbook/workbook.hpp
+++ b/include/xlnt/workbook/workbook.hpp
@@ -33,6 +33,7 @@
 #include <vector>
 
 #include <xlnt/xlnt_config.hpp>
+#include <xlnt/cell/rich_text.hpp>
 
 namespace xlnt {
 
@@ -700,10 +701,10 @@ public:
     /// </summary>
     class style create_style(const std::string &name);
 
-	/// <summary>
-	/// Creates a new style and returns it.
-	/// </summary>
-	class style create_builtin_style(std::size_t builtin_id);
+    /// <summary>
+    /// Creates a new style and returns it.
+    /// </summary>
+    class style create_builtin_style(std::size_t builtin_id);
 
     /// <summary>
     /// Clear all named styles from cells and remove the styles from
@@ -759,17 +760,27 @@ public:
     /// </summary>
     std::size_t add_shared_string(const rich_text &shared, bool allow_duplicates = false);
 
-    /// <summary>
-    /// Returns a reference to the shared strings being used by cells
-    /// in this workbook.
-    /// </summary>
-    std::vector<rich_text> &shared_strings();
+  	/// <summary>
+  	/// Returns a reference to the shared string ordered by id
+  	/// </summary>
+  	const std::unordered_map<std::size_t, rich_text> &shared_strings_by_id() const;
+
+  	/// <summary>
+  	/// Returns a reference to the shared string related to the specified index
+  	/// </summary>
+  	const rich_text &shared_strings(std::size_t index) const;
 
     /// <summary>
     /// Returns a reference to the shared strings being used by cells
     /// in this workbook.
     /// </summary>
-    const std::vector<rich_text> &shared_strings() const;
+    std::unordered_map<rich_text, std::size_t, rich_text_hash> &shared_strings();
+
+    /// <summary>
+    /// Returns a reference to the shared strings being used by cells
+    /// in this workbook.
+    /// </summary>
+    const std::unordered_map<rich_text, std::size_t, rich_text_hash> &shared_strings() const;
 
     // Thumbnail
 
diff --git a/source/cell/cell.cpp b/source/cell/cell.cpp
index bc5f558f..667212d8 100644
--- a/source/cell/cell.cpp
+++ b/source/cell/cell.cpp
@@ -704,7 +704,7 @@ XLNT_API rich_text cell::value() const
 {
     if (data_type() == cell::type::shared_string)
     {
-        return workbook().shared_strings().at(static_cast<std::size_t>(d_->value_numeric_));
+        return workbook().shared_strings(static_cast<std::size_t>(d_->value_numeric_));
     }
 
     return d_->value_text_;
@@ -861,19 +861,19 @@ style cell::style()
         throw invalid_attribute();
     }
 
-	auto f = format();
+    auto f = format();
 
     return f.style();
 }
 
 const style cell::style() const
 {
-	if (!has_format() || !format().has_style())
-	{
-		throw invalid_attribute();
-	}
+    if (!has_format() || !format().has_style())
+    {
+        throw invalid_attribute();
+    }
 
-	return format().style();
+    return format().style();
 }
 
 bool cell::has_style() const
diff --git a/source/cell/rich_text.cpp b/source/cell/rich_text.cpp
index 6cda69db..3cf13290 100644
--- a/source/cell/rich_text.cpp
+++ b/source/cell/rich_text.cpp
@@ -45,6 +45,18 @@ rich_text::rich_text(const std::string &plain_text, const class font &text_font)
 {
 }
 
+rich_text::rich_text(const rich_text &other)
+{
+    *this = other;
+}
+
+rich_text &rich_text::operator=(const rich_text &rhs)
+{
+    runs_.clear();
+    runs_ = rhs.runs_;
+    return *this;
+}
+
 rich_text::rich_text(const rich_text_run &single_run)
 {
     add_run(single_run);
@@ -63,6 +75,11 @@ void rich_text::plain_text(const std::string &s, bool preserve_space = false)
 
 std::string rich_text::plain_text() const
 {
+    if (runs_.size() == 1)
+    {
+        return runs_.begin()->first;
+    }
+
     return std::accumulate(runs_.begin(), runs_.end(), std::string(),
         [](const std::string &a, const rich_text_run &run) { return a + run.first; });
 }
diff --git a/source/detail/header_footer/header_footer_code.cpp b/source/detail/header_footer/header_footer_code.cpp
index d598ff26..f97ef659 100644
--- a/source/detail/header_footer/header_footer_code.cpp
+++ b/source/detail/header_footer/header_footer_code.cpp
@@ -547,7 +547,6 @@ std::string encode_header_footer(const rich_text &t, header_footer::location whe
                 case font::underline_style::double_accounting:
                     encoded.append("&E");
                     break;
-                default:
                 case font::underline_style::none:
                     break;
                 }
diff --git a/source/detail/implementations/workbook_impl.hpp b/source/detail/implementations/workbook_impl.hpp
index 38d099cb..6edd4332 100644
--- a/source/detail/implementations/workbook_impl.hpp
+++ b/source/detail/implementations/workbook_impl.hpp
@@ -47,14 +47,15 @@ struct worksheet_impl;
 
 struct workbook_impl
 {
-	workbook_impl() : base_date_(calendar::windows_1900)
-	{
-	}
+    workbook_impl() : base_date_(calendar::windows_1900)
+    {
+    }
 
     workbook_impl(const workbook_impl &other)
         : active_sheet_index_(other.active_sheet_index_),
           worksheets_(other.worksheets_),
-          shared_strings_(other.shared_strings_),
+          shared_strings_ids_(other.shared_strings_ids_),
+          shared_strings_values_(other.shared_strings_values_),
           stylesheet_(other.stylesheet_),
           manifest_(other.manifest_),
           theme_(other.theme_),
@@ -72,15 +73,15 @@ struct workbook_impl
         active_sheet_index_ = other.active_sheet_index_;
         worksheets_.clear();
         std::copy(other.worksheets_.begin(), other.worksheets_.end(), back_inserter(worksheets_));
-        shared_strings_.clear();
-        std::copy(other.shared_strings_.begin(), other.shared_strings_.end(), std::back_inserter(shared_strings_));
-		theme_ = other.theme_;
+        shared_strings_ids_ = other.shared_strings_ids_;
+        shared_strings_values_ = other.shared_strings_values_;
+        theme_ = other.theme_;
         manifest_ = other.manifest_;
 
-		sheet_title_rel_id_map_ = other.sheet_title_rel_id_map_;
-		view_ = other.view_;
-		code_name_ = other.code_name_;
-		file_version_ = other.file_version_;
+        sheet_title_rel_id_map_ = other.sheet_title_rel_id_map_;
+        view_ = other.view_;
+        code_name_ = other.code_name_;
+        file_version_ = other.file_version_;
 
         core_properties_ = other.core_properties_;
         extended_properties_ = other.extended_properties_;
@@ -116,13 +117,14 @@ struct workbook_impl
     optional<std::size_t> active_sheet_index_;
 
     std::list<worksheet_impl> worksheets_;
-    std::vector<rich_text> shared_strings_;
+    std::unordered_map<rich_text, std::size_t, rich_text_hash> shared_strings_ids_;
+    std::unordered_map<std::size_t, rich_text> shared_strings_values_;
 
     optional<stylesheet> stylesheet_;
 
     calendar base_date_;
     optional<std::string> title_;
-    
+
     manifest manifest_;
     optional<theme> theme_;
     std::unordered_map<std::string, std::vector<std::uint8_t>> images_;
@@ -131,11 +133,12 @@ struct workbook_impl
     std::vector<std::pair<xlnt::extended_property, variant>> extended_properties_;
     std::vector<std::pair<std::string, variant>> custom_properties_;
 
-	std::unordered_map<std::string, std::string> sheet_title_rel_id_map_;
+    std::unordered_map<std::string, std::string> sheet_title_rel_id_map_;
 
     optional<workbook_view> view_;
     optional<std::string> code_name_;
 
+<<<<<<< Updated upstream
 	struct file_version_t
 	{
 		std::string app_name;
@@ -152,6 +155,16 @@ struct workbook_impl
         }
 	};
     
+=======
+    struct file_version_t
+    {
+        std::string app_name;
+        std::size_t last_edited;
+        std::size_t lowest_edited;
+        std::size_t rup_build;
+    };
+
+>>>>>>> Stashed changes
     optional<file_version_t> file_version_;
     optional<calculation_properties> calculation_properties_;
     optional<std::string> abs_path_;
diff --git a/source/detail/serialization/xlsx_consumer.cpp b/source/detail/serialization/xlsx_consumer.cpp
index a634bf7b..91dfc91b 100644
--- a/source/detail/serialization/xlsx_consumer.cpp
+++ b/source/detail/serialization/xlsx_consumer.cpp
@@ -246,7 +246,11 @@ cell xlsx_consumer::read_cell()
 
     if (parser().attribute_present("s"))
     {
+<<<<<<< Updated upstream
         cell.format(target_.format(static_cast<std::size_t>(std::stoull(parser().attribute("s")))));
+=======
+        cell.format(target_.format(std::stoull(parser().attribute("s"))));
+>>>>>>> Stashed changes
     }
 
     auto has_value = false;
@@ -536,12 +540,15 @@ std::string xlsx_consumer::read_worksheet_begin(const std::string &rel_id)
                             current_selection.active_cell(parser().attribute("activeCell"));
                         }
 
+<<<<<<< Updated upstream
                         if (parser().attribute_present("sqref"))
                         {
                             const auto sqref = range_reference(parser().attribute("sqref"));
                             current_selection.sqref(sqref);
                         }
 
+=======
+>>>>>>> Stashed changes
                         current_selection.pane(pane_corner::top_left);
 
                         new_view.add_selection(current_selection);
@@ -727,7 +734,11 @@ void xlsx_consumer::read_worksheet_sheetdata()
 
             if (parser().attribute_present("s"))
             {
+<<<<<<< Updated upstream
                 cell.format(target_.format(static_cast<std::size_t>(std::stoull(parser().attribute("s")))));
+=======
+                cell.format(target_.format(std::stoull(parser().attribute("s"))));
+>>>>>>> Stashed changes
             }
 
             auto has_value = false;
@@ -1021,14 +1032,14 @@ worksheet xlsx_consumer::read_worksheet_end(const std::string &rel_id)
         {
             header_footer hf;
 
-            hf.align_with_margins(
-                !parser().attribute_present("alignWithMargins") || is_true(parser().attribute("alignWithMargins")));
-            hf.scale_with_doc(
-                !parser().attribute_present("alignWithMargins") || is_true(parser().attribute("alignWithMargins")));
-            auto different_odd_even =
-                parser().attribute_present("differentOddEven") && is_true(parser().attribute("differentOddEven"));
-            auto different_first =
-                parser().attribute_present("differentFirst") && is_true(parser().attribute("differentFirst"));
+            hf.align_with_margins(!parser().attribute_present("alignWithMargins")
+                || is_true(parser().attribute("alignWithMargins")));
+            hf.scale_with_doc(!parser().attribute_present("alignWithMargins")
+                || is_true(parser().attribute("alignWithMargins")));
+            auto different_odd_even = parser().attribute_present("differentOddEven")
+                && is_true(parser().attribute("differentOddEven"));
+            auto different_first = parser().attribute_present("differentFirst")
+                && is_true(parser().attribute("differentFirst"));
 
             optional<std::array<optional<rich_text>, 3>> odd_header;
             optional<std::array<optional<rich_text>, 3>> odd_footer;
@@ -1082,13 +1093,17 @@ worksheet xlsx_consumer::read_worksheet_end(const std::string &rel_id)
 
                 if (different_odd_even)
                 {
-                    if (odd_header.is_set() && odd_header.get().at(i).is_set() && even_header.is_set()
+                    if (odd_header.is_set()
+                        && odd_header.get().at(i).is_set()
+                        && even_header.is_set()
                         && even_header.get().at(i).is_set())
                     {
                         hf.odd_even_header(loc, odd_header.get().at(i).get(), even_header.get().at(i).get());
                     }
 
-                    if (odd_footer.is_set() && odd_footer.get().at(i).is_set() && even_footer.is_set()
+                    if (odd_footer.is_set()
+                        && odd_footer.get().at(i).is_set()
+                        && even_footer.is_set()
                         && even_footer.get().at(i).is_set())
                     {
                         hf.odd_even_footer(loc, odd_footer.get().at(i).get(), even_footer.get().at(i).get());
@@ -1915,18 +1930,17 @@ void xlsx_consumer::read_shared_string_table()
         unique_count = parser().attribute<std::size_t>("uniqueCount");
     }
 
-    auto &strings = target_.shared_strings();
-
     while (in_element(qn("spreadsheetml", "sst")))
     {
         expect_start_element(qn("spreadsheetml", "si"), xml::content::complex);
-        strings.push_back(read_rich_text(qn("spreadsheetml", "si")));
+        auto rt = read_rich_text(qn("spreadsheetml", "si"));
+        target_.add_shared_string(rt);
         expect_end_element(qn("spreadsheetml", "si"));
     }
 
     expect_end_element(qn("spreadsheetml", "sst"));
 
-    if (has_unique_count && unique_count != strings.size())
+    if (has_unique_count && unique_count != target_.shared_strings().size())
     {
         throw invalid_file("sizes don't match");
     }
diff --git a/source/detail/serialization/xlsx_producer.cpp b/source/detail/serialization/xlsx_producer.cpp
index 5d854d7d..ec0d890e 100644
--- a/source/detail/serialization/xlsx_producer.cpp
+++ b/source/detail/serialization/xlsx_producer.cpp
@@ -850,15 +850,17 @@ void xlsx_producer::write_shared_string_table(const relationship & /*rel*/)
 #pragma clang diagnostic pop
 
     write_attribute("count", string_count);
-    write_attribute("uniqueCount", source_.shared_strings().size());
+    write_attribute("uniqueCount", source_.shared_strings_by_id().size());
 
-    for (const auto &string : source_.shared_strings())
+    for (const auto &string : source_.shared_strings_by_id())
     {
-        if (string.runs().size() == 1 && !string.runs().at(0).second.is_set())
+        if (string.second.runs().size() == 1 && !string.second.runs().at(0).second.is_set())
         {
             write_start_element(xmlns, "si");
             write_start_element(xmlns, "t");
-            write_characters(string.plain_text(), string.runs().front().preserve_space);
+
+            write_characters(string.second.plain_text(), string.second.runs().front().preserve_space);
+
             write_end_element(xmlns, "t");
             write_end_element(xmlns, "si");
 
@@ -867,7 +869,7 @@ void xlsx_producer::write_shared_string_table(const relationship & /*rel*/)
 
         write_start_element(xmlns, "si");
 
-        for (const auto &run : string.runs())
+        for (const auto &run : string.second.runs())
         {
             write_start_element(xmlns, "r");
 
@@ -2164,7 +2166,7 @@ void xlsx_producer::write_worksheet(const relationship &rel)
         })->first;
 
     auto ws = source_.sheet_by_title(title);
-	
+
     write_start_element(xmlns, "worksheet");
     write_namespace(xmlns, "");
     write_namespace(xmlns_r, "r");
@@ -2372,7 +2374,7 @@ void xlsx_producer::write_worksheet(const relationship &rel)
     for (auto column = first_column; column <= last_column; column++)
     {
         if (!ws.has_column_properties(column)) continue;
-        
+
 	    if(!has_column_properties)
         {
             write_start_element(xmlns, "cols");
diff --git a/source/styles/color.cpp b/source/styles/color.cpp
index 01561eec..141616fc 100644
--- a/source/styles/color.cpp
+++ b/source/styles/color.cpp
@@ -32,14 +32,14 @@ namespace {
 
 std::array<std::uint8_t, 4> decode_hex_string(const std::string &hex_string)
 {
-	auto x = std::strtoul(hex_string.c_str(), nullptr, 16);
+    auto x = std::strtoul(hex_string.c_str(), nullptr, 16);
 
-	auto a = static_cast<std::uint8_t>(x >> 24);
-	auto r = static_cast<std::uint8_t>((x >> 16) & 0xff);
-	auto g = static_cast<std::uint8_t>((x >> 8) & 0xff);
-	auto b = static_cast<std::uint8_t>(x & 0xff);
+    auto a = static_cast<std::uint8_t>(x >> 24);
+    auto r = static_cast<std::uint8_t>((x >> 16) & 0xff);
+    auto g = static_cast<std::uint8_t>((x >> 8) & 0xff);
+    auto b = static_cast<std::uint8_t>(x & 0xff);
 
-	return { { r, g, b, a } };
+    return { { r, g, b, a } };
 }
 
 } // namespace
@@ -54,7 +54,7 @@ indexed_color::indexed_color(std::size_t index) : index_(index)
 
 std::size_t indexed_color::index() const
 {
-	return index_;
+    return index_;
 }
 
 void indexed_color::index(std::size_t index)
@@ -70,7 +70,7 @@ theme_color::theme_color(std::size_t index) : index_(index)
 
 std::size_t theme_color::index() const
 {
-	return index_;
+    return index_;
 }
 
 void theme_color::index(std::size_t index)
@@ -110,84 +110,84 @@ rgb_color::rgb_color(std::uint8_t r, std::uint8_t g, std::uint8_t b, std::uint8_
 
 std::uint8_t rgb_color::red() const
 {
-	return rgba_[0];
+    return rgba_[0];
 }
 
 std::uint8_t rgb_color::green() const
 {
-	return rgba_[1];
+    return rgba_[1];
 }
 
 std::uint8_t rgb_color::blue() const
 {
-	return rgba_[2];
+    return rgba_[2];
 }
 
 std::uint8_t rgb_color::alpha() const
 {
-	return rgba_[3];
+    return rgba_[3];
 }
 
 std::array<std::uint8_t, 3> rgb_color::rgb() const
 {
-	return {{red(), green(), blue()}};
+    return {{red(), green(), blue()}};
 }
 
 std::array<std::uint8_t, 4> rgb_color::rgba() const
 {
-	return rgba_;
+    return rgba_;
 }
 
 // color implementation
 
 const color color::black()
 {
-	return color(rgb_color("ff000000"));
+    return color(rgb_color("ff000000"));
 }
 
 const color color::white()
 {
-	return color(rgb_color("ffffffff"));
+    return color(rgb_color("ffffffff"));
 }
 
 const color color::red()
 {
-	return color(rgb_color("ffff0000"));
+    return color(rgb_color("ffff0000"));
 }
 
 const color color::darkred()
 {
-	return color(rgb_color("ff8b0000"));
+    return color(rgb_color("ff8b0000"));
 }
 
 const color color::blue()
 {
-	return color(rgb_color("ff0000ff"));
+    return color(rgb_color("ff0000ff"));
 }
 
 const color color::darkblue()
 {
-	return color(rgb_color("ff00008b"));
+    return color(rgb_color("ff00008b"));
 }
 
 const color color::green()
 {
-	return color(rgb_color("ff00ff00"));
+    return color(rgb_color("ff00ff00"));
 }
 
 const color color::darkgreen()
 {
-	return color(rgb_color("ff008b00"));
+    return color(rgb_color("ff008b00"));
 }
 
 const color color::yellow()
 {
-	return color(rgb_color("ffffff00"));
+    return color(rgb_color("ffffff00"));
 }
 
 const color color::darkyellow()
 {
-	return color(rgb_color("ffcccc00"));
+    return color(rgb_color("ffcccc00"));
 }
 
 color::color() : color(indexed_color(0))
@@ -195,48 +195,48 @@ color::color() : color(indexed_color(0))
 }
 
 color::color(const rgb_color &rgb)
-	: type_(color_type::rgb),
-	  rgb_(rgb),
-	  indexed_(0),
-	  theme_(0)
+  : type_(color_type::rgb),
+    rgb_(rgb),
+    indexed_(0),
+    theme_(0)
 {
 }
 
 color::color(const indexed_color &indexed)
-	: type_(color_type::indexed),
-	  rgb_(rgb_color(0, 0, 0, 0)),
-	  indexed_(indexed),
-	  theme_(0)
+  : type_(color_type::indexed),
+    rgb_(rgb_color(0, 0, 0, 0)),
+    indexed_(indexed),
+    theme_(0)
 {
 }
 
 color::color(const theme_color &theme)
-	: type_(color_type::theme),
-	  rgb_(rgb_color(0, 0, 0, 0)),
-	  indexed_(0),
-	  theme_(theme)
+  : type_(color_type::theme),
+    rgb_(rgb_color(0, 0, 0, 0)),
+    indexed_(0),
+    theme_(theme)
 {
 }
 
 color_type color::type() const
 {
-	return type_;
+    return type_;
 }
 
 bool color::auto_() const
 {
-	return auto__;
+    return auto__;
 }
 
 void color::auto_(bool value)
 {
-	auto__ = value;
+    auto__ = value;
 }
 
 const indexed_color& color::indexed() const
 {
-	assert_type(color_type::indexed);
-	return indexed_;
+    assert_type(color_type::indexed);
+    return indexed_;
 }
 
 indexed_color &color::indexed()
@@ -247,8 +247,8 @@ indexed_color &color::indexed()
 
 const theme_color& color::theme() const
 {
-	assert_type(color_type::theme);
-	return theme_;
+    assert_type(color_type::theme);
+    return theme_;
 }
 
 theme_color &color::theme()
@@ -276,7 +276,7 @@ void color::tint(double tint)
 
 double color::tint() const
 {
-	return tint_;
+    return tint_;
 }
 
 void color::assert_type(color_type t) const
@@ -309,7 +309,7 @@ bool color::operator==(const xlnt::color &other) const
 
 bool color::operator!=(const color &other) const
 {
-	return !(*this == other);
+    return !(*this == other);
 }
 
 } // namespace xlnt
diff --git a/source/utils/path.cpp b/source/utils/path.cpp
index 34c36cf0..738d71f9 100644
--- a/source/utils/path.cpp
+++ b/source/utils/path.cpp
@@ -23,6 +23,8 @@
 
 #include <fstream>
 #include <sstream>
+#include <algorithm>
+#include <iterator>
 #include <sys/stat.h>
 
 #ifdef __APPLE__
@@ -137,8 +139,8 @@ path::path()
 }
 
 path::path(const std::string &path_string)
-    : internal_(path_string)
 {
+	std::remove_copy(path_string.begin(), path_string.end(), std::back_inserter(internal_), '\"');
 }
 
 path::path(const std::string &path_string, char sep)
diff --git a/source/workbook/workbook.cpp b/source/workbook/workbook.cpp
index c4739f03..6c621cc6 100644
--- a/source/workbook/workbook.cpp
+++ b/source/workbook/workbook.cpp
@@ -473,11 +473,15 @@ workbook workbook::empty()
                             .color(theme_color(1));
     stylesheet.fonts.push_back(default_font);
 
+<<<<<<< Updated upstream
     wb.create_builtin_style(0)
         .border(default_border)
         .fill(default_fill)
         .font(default_font)
         .number_format(xlnt::number_format::general());
+=======
+  wb.create_builtin_style(0);
+>>>>>>> Stashed changes
 
     wb.create_format(true)
         .border(default_border)
@@ -1017,8 +1021,8 @@ void workbook::load(const std::wstring &filename, const std::string &password)
 
 void workbook::remove_sheet(worksheet ws)
 {
-    auto match_iter = std::find_if(
-        d_->worksheets_.begin(), d_->worksheets_.end(), [=](detail::worksheet_impl &comp) { return &comp == ws.d_; });
+    auto match_iter = std::find_if(d_->worksheets_.begin(), d_->worksheets_.end(),
+      [=](detail::worksheet_impl &comp) { return &comp == ws.d_; });
 
     if (match_iter == d_->worksheets_.end())
     {
@@ -1071,10 +1075,10 @@ worksheet workbook::create_sheet_with_rel(const std::string &title, const relati
 
     auto workbook_rel = d_->manifest_.relationship(path("/"), relationship_type::office_document);
     auto sheet_absoulute_path = workbook_rel.target().path().parent().append(rel.target().path());
-    d_->manifest_.register_override_type(
-        sheet_absoulute_path, "application/vnd.openxmlformats-officedocument.spreadsheetml.worksheet+xml");
-    auto ws_rel = d_->manifest_.register_relationship(
-        workbook_rel.target(), relationship_type::worksheet, rel.target(), target_mode::internal);
+    d_->manifest_.register_override_type(sheet_absoulute_path,
+        "application/vnd.openxmlformats-officedocument.spreadsheetml.worksheet+xml");
+    auto ws_rel = d_->manifest_.register_relationship(workbook_rel.target(),
+        relationship_type::worksheet, rel.target(), target_mode::internal);
     d_->sheet_title_rel_id_map_[title] = ws_rel;
 
     update_sheet_properties();
@@ -1332,39 +1336,53 @@ const manifest &workbook::manifest() const
     return d_->manifest_;
 }
 
-std::vector<rich_text> &workbook::shared_strings()
+const std::unordered_map<std::size_t, rich_text> &workbook::shared_strings_by_id() const
 {
-    return d_->shared_strings_;
+    return d_->shared_strings_values_;
 }
 
-const std::vector<rich_text> &workbook::shared_strings() const
+const rich_text& workbook::shared_strings(std::size_t index) const
 {
-    return d_->shared_strings_;
+    auto it = d_->shared_strings_values_.find(index);
+
+    if (it != d_->shared_strings_values_.end())
+    {
+        return it->second;
+    }
+
+    static rich_text empty;
+    return empty;
+}
+
+std::unordered_map<rich_text, std::size_t, rich_text_hash> &workbook::shared_strings()
+{
+    return d_->shared_strings_ids_;
+}
+
+const std::unordered_map<rich_text, std::size_t, rich_text_hash> &workbook::shared_strings() const
+{
+    return d_->shared_strings_ids_;
 }
 
 std::size_t workbook::add_shared_string(const rich_text &shared, bool allow_duplicates)
 {
     register_workbook_part(relationship_type::shared_string_table);
 
-    auto index = std::size_t(0);
-
     if (!allow_duplicates)
     {
-        // TODO: inefficient, use a set or something?
-        for (auto &s : d_->shared_strings_)
-        {
-            if (s == shared)
-            {
-                return index;
-            }
+        auto it = d_->shared_strings_ids_.find(shared);
 
-            ++index;
+        if (it != d_->shared_strings_ids_.end())
+        {
+            return it->second;
         }
     }
 
-    d_->shared_strings_.push_back(shared);
+    auto sz = d_->shared_strings_ids_.size();
+    d_->shared_strings_ids_[shared] = sz;
+    d_->shared_strings_values_[sz] = shared;
 
-    return index;
+    return sz;
 }
 
 bool workbook::contains(const std::string &sheet_title) const
diff --git a/tests/workbook/serialization_test_suite.cpp b/tests/workbook/serialization_test_suite.cpp
index 744103ee..708ac5a2 100644
--- a/tests/workbook/serialization_test_suite.cpp
+++ b/tests/workbook/serialization_test_suite.cpp
@@ -110,6 +110,7 @@ public:
         const auto path = path_helper::test_file("3_default.xlsx");
         xlnt_assert(workbook_matches_file(wb, path));
     }
+<<<<<<< Updated upstream:tests/workbook/serialization_test_suite.cpp
 
     void test_produce_simple_excel()
     {
@@ -245,6 +246,103 @@ public:
 
         sheet1.cell("A5").hyperlink("https://google.com/");
         sheet1.cell("A5").format(hyperlink_format);
+=======
+
+    void test_produce_simple_excel()
+    {
+        xlnt::workbook wb;
+        auto ws = wb.active_sheet();
+
+        auto bold_font = xlnt::font().bold(true);
+
+        ws.cell("A1").value("Type");
+        ws.cell("A1").font(bold_font);
+
+        ws.cell("B1").value("Value");
+        ws.cell("B1").font(bold_font);
+
+        ws.cell("A2").value("null");
+        ws.cell("B2").value(nullptr);
+
+        ws.cell("A3").value("bool (true)");
+        ws.cell("B3").value(true);
+
+        ws.cell("A4").value("bool (false)");
+        ws.cell("B4").value(false);
+
+        ws.cell("A5").value("number (int)");
+        ws.cell("B5").value(std::numeric_limits<int>::max());
+
+        ws.cell("A5").value("number (unsigned int)");
+        ws.cell("B5").value(std::numeric_limits<unsigned int>::max());
+
+        ws.cell("A6").value("number (long long int)");
+        ws.cell("B6").value(std::numeric_limits<long long int>::max());
+
+        ws.cell("A6").value("number (unsigned long long int)");
+        ws.cell("B6").value(std::numeric_limits<unsigned long long int>::max());
+
+        ws.cell("A13").value("number (float)");
+        ws.cell("B13").value(std::numeric_limits<float>::max());
+
+        ws.cell("A14").value("number (double)");
+        ws.cell("B14").value(std::numeric_limits<double>::max());
+
+        ws.cell("A16").value("text (char *)");
+        ws.cell("B16").value("string");
+
+        ws.cell("A17").value("text (std::string)");
+        ws.cell("B17").value(std::string("string"));
+
+        ws.cell("A18").value("date");
+        ws.cell("B18").value(xlnt::date(2016, 2, 3));
+
+        ws.cell("A19").value("time");
+        ws.cell("B19").value(xlnt::time(1, 2, 3, 4));
+
+        ws.cell("A20").value("datetime");
+        ws.cell("B20").value(xlnt::datetime(2016, 2, 3, 1, 2, 3, 4));
+
+        ws.cell("A21").value("timedelta");
+        ws.cell("B21").value(xlnt::timedelta(1, 2, 3, 4, 5));
+
+        ws.freeze_panes("B2");
+
+        std::vector<std::uint8_t> temp_buffer;
+        wb.save(temp_buffer);
+        xlnt_assert(!temp_buffer.empty());
+    }
+
+      void test_save_after_sheet_deletion()
+      {
+          xlnt::workbook workbook;
+
+          xlnt_assert_equals(workbook.sheet_titles().size(), 1);
+
+          auto sheet = workbook.create_sheet();
+          sheet.title("XXX1");
+          xlnt_assert_equals(workbook.sheet_titles().size(), 2);
+
+          workbook.remove_sheet(workbook.sheet_by_title("XXX1"));
+          xlnt_assert_equals(workbook.sheet_titles().size(), 1);
+
+          std::vector<std::uint8_t> temp_buffer;
+          xlnt_assert_throws_nothing(workbook.save(temp_buffer));
+          xlnt_assert(!temp_buffer.empty());
+      }
+
+    void test_write_comments_hyperlinks_formulae()
+    {
+        xlnt::workbook wb;
+        auto sheet1 = wb.active_sheet();
+        auto comment_font = xlnt::font().bold(true).size(10).color(xlnt::indexed_color(81)).name("Calibri");
+
+        sheet1.cell("A1").value("Sheet1!A1");
+        sheet1.cell("A1").comment("Sheet1 comment", comment_font, "Microsoft Office User");
+
+        sheet1.cell("A2").value("Sheet1!A2");
+        sheet1.cell("A2").comment("Sheet1 comment2", comment_font, "Microsoft Office User");
+>>>>>>> Stashed changes:tests/workbook/serialization_test_suite.hpp
 
         sheet1.cell("A6").hyperlink(sheet1.cell("A1"));
         sheet1.cell("A6").format(hyperlink_format);
@@ -257,6 +355,7 @@ public:
         sheet1.cell("C2").value("a");
         sheet1.cell("C3").value("b");
 
+<<<<<<< Updated upstream:tests/workbook/serialization_test_suite.cpp
         for (auto i = 1; i <= 7; ++i)
         {
             sheet1.row_properties(i).dy_descent = 0.2;
@@ -270,6 +369,11 @@ public:
         // comments
         sheet2.cell("A1").value("Sheet2!A1");
         sheet2.cell("A1").comment("Sheet2 comment", comment_font, "Microsoft Office User");
+=======
+        auto sheet2 = wb.create_sheet();
+        sheet2.cell("A1").value("Sheet2!A1");
+        sheet2.cell("A2").comment("Sheet2 comment", comment_font, "Microsoft Office User");
+>>>>>>> Stashed changes:tests/workbook/serialization_test_suite.hpp
 
         sheet2.cell("A2").value("Sheet2!A2");
         sheet2.cell("A2").comment("Sheet2 comment2", comment_font, "Microsoft Office User");
@@ -360,11 +464,17 @@ public:
     {
 #ifdef _MSC_VER
         xlnt::workbook wb;
+<<<<<<< Updated upstream:tests/workbook/serialization_test_suite.cpp
         // L"/9_unicode_Λ.xlsx" doesn't use wchar_t(0x039B) for the capital lambda...
         // L"/9_unicode_\u039B.xlsx" gives the corrct output
         const auto path = LSTRING_LITERAL(XLNT_TEST_DATA_DIR) L"/9_unicode_\u039B.xlsx"; // L"/9_unicode_Λ.xlsx"
         wb.load(path);
         xlnt_assert_equals(wb.active_sheet().cell("A1").value<std::string>(), u8"un\u00EFc\u00F4d\u0117!"); // u8"unïcôdė!"
+=======
+        std::wstring path = LSTRING_LITERAL(XLNT_TEST_DATA_DIR) L"/9_unicode_Λ.xlsx";
+        wb.load(path_normalized);
+        xlnt_assert_equals(wb.active_sheet().cell("A1").value<std::string>(), u8"unicodê!");
+>>>>>>> Stashed changes:tests/workbook/serialization_test_suite.hpp
 #endif
 
 #ifndef __MINGW32__
@@ -560,8 +670,13 @@ public:
         ws.column_properties("E").width = width;
         ws.column_properties("E").custom_width = true;
 
+<<<<<<< Updated upstream:tests/workbook/serialization_test_suite.cpp
         xlnt_assert(workbook_matches_file(wb,
             path_helper::test_file("13_custom_heights_widths.xlsx")));
+=======
+        wb.save("temp.xlsx");
+        xlnt_assert(workbook_matches_file(wb, path_helper::test_file("13_custom_heights_widths.xlsx")));
+>>>>>>> Stashed changes:tests/workbook/serialization_test_suite.hpp
     }
 
     /// <summary>
@@ -709,4 +824,4 @@ public:
         c3.value("C3!");
     }
 };
-static serialization_test_suite x;
\ No newline at end of file
+static serialization_test_suite x;