JCrawfy
ee593c2673
bug fixes, move the faster serialisation into the numeric header
...
serialisation ends up roughly 2x improvement going from sstream to snprintf
Run on (4 X 3500 MHz CPU s)
CPU Caches:
L1 Data 32K (x4)
L1 Instruction 32K (x4)
L2 Unified 262K (x4)
L3 Unified 6291K (x1)
-------------------------------------------------------------------------------------------------------------
Benchmark Time CPU Iterations
-------------------------------------------------------------------------------------------------------------
RandFloatStrs/double_from_string_sstream 968 ns 977 ns 640000
RandFloatStrs/double_from_string_strtod 272 ns 270 ns 2488889
RandFloatStrs/double_from_string_strtod_fixed 272 ns 270 ns 2488889
RandFloatStrs/double_from_string_strtod_fixed_const_ref 273 ns 270 ns 2488889
RandFloatStrs/double_from_string_std_from_chars 193 ns 195 ns 3446154
RandFloatCommaStrs/double_from_string_strtod_fixed_comma_ref 272 ns 273 ns 2635294
RandFloatCommaStrs/double_from_string_strtod_fixed_comma_const_ref 276 ns 273 ns 2635294
RandFloats/string_from_double_sstream 1311 ns 1318 ns 497778
RandFloats/string_from_double_sstream_cached 1076 ns 1050 ns 640000
RandFloats/string_from_double_snprintf 601 ns 600 ns 1120000
RandFloats/string_from_double_snprintf_fixed 600 ns 600 ns 1120000
RandFloats/string_from_double_std_to_chars 117 ns 117 ns 5600000
RandFloatsComma/string_from_double_snprintf_fixed_comma 600 ns 600 ns 1120000
2020-03-01 22:01:14 +13:00
JCrawfy
d135f35bd4
minor cleanup
2020-03-01 20:24:22 +13:00
JCrawfy
a5aca5c212
add the fixed snprintf serialiser
...
Run on (4 X 3500 MHz CPU s)
CPU Caches:
L1 Data 32K (x4)
L1 Instruction 32K (x4)
L2 Unified 262K (x4)
L3 Unified 6291K (x1)
-------------------------------------------------------------------------------------------------------------
Benchmark Time CPU Iterations
-------------------------------------------------------------------------------------------------------------
RandFloatStrs/double_from_string_sstream 969 ns 977 ns 640000
RandFloatStrs/double_from_string_strtod 274 ns 270 ns 2488889
RandFloatStrs/double_from_string_strtod_fixed 273 ns 273 ns 2635294
RandFloatStrs/double_from_string_strtod_fixed_const_ref 274 ns 276 ns 2488889
RandFloatStrs/double_from_string_std_from_chars 193 ns 193 ns 3733333
RandFloatCommaStrs/double_from_string_strtod_fixed_comma_ref 273 ns 267 ns 2635294
RandFloatCommaStrs/double_from_string_strtod_fixed_comma_const_ref 273 ns 273 ns 2635294
RandFloats/string_from_double_sstream 1323 ns 1311 ns 560000
RandFloats/string_from_double_sstream_cached 1074 ns 1074 ns 640000
RandFloats/string_from_double_snprintf 519 ns 516 ns 1000000
RandFloats/string_from_double_snprintf_fixed 517 ns 516 ns 1000000
RandFloats/string_from_double_std_to_chars 118 ns 117 ns 5600000
RandFloatsComma/string_from_double_snprintf_fixed_comma 520 ns 516 ns 1120000
2020-02-29 23:10:38 +13:00
JCrawfy
7ba36b5e73
fix dumb bug in input randomiser, add basic double->string benchmarks
...
* input randomiser was feeding a constant value previously, now actually randomising
* start to_string with the current method (sstream), an faster more correct version (sstream_cached), snprintf, and std::to_chars
** NOTE: only std::to_chars and sstream_cached are correct in the face of locales
Run on (4 X 3500 MHz CPU s)
CPU Caches:
L1 Data 32K (x4)
L1 Instruction 32K (x4)
L2 Unified 262K (x4)
L3 Unified 6291K (x1)
-------------------------------------------------------------------------------------------------------------
Benchmark Time CPU Iterations
-------------------------------------------------------------------------------------------------------------
RandFloatStrs/double_from_string_sstream 1012 ns 1001 ns 640000
RandFloatStrs/double_from_string_strtod 276 ns 276 ns 2488889
RandFloatStrs/double_from_string_strtod_fixed 312 ns 308 ns 2133333
RandFloatStrs/double_from_string_strtod_fixed_const_ref 307 ns 300 ns 2240000
RandFloatStrs/double_from_string_std_from_chars 194 ns 188 ns 3733333
RandFloatCommaStrs/double_from_string_strtod_fixed_comma_ref 315 ns 314 ns 2240000
RandFloatCommaStrs/double_from_string_strtod_fixed_comma_const_ref 306 ns 305 ns 2357895
RandFloats/string_from_double_sstream 1372 ns 1381 ns 497778
RandFloats/string_from_double_sstream_cached 1136 ns 1123 ns 640000
RandFloats/string_from_double_snprintf 536 ns 516 ns 1000000
RandFloats/string_from_double_std_to_chars 116 ns 115 ns 6400000
2020-02-29 22:59:25 +13:00
JCrawfy
0adb8a69b1
add micro benchmarking project, setup number parsing benchmark
...
relating to previous work https://github.com/tfussell/xlnt/issues/422
Results are matching what was observed at the time ^^ was being worked on
std::from_chars is included as the target to beat, but since only MSVC has it for floating point it's not
hugely useful yet
uniform real distribution is probably a horrible choice, and it might be good to randomise the number
of sf in each string also (currently the y all end up at max length)
Run on (4 X 3500 MHz CPU s)
CPU Caches:
L1 Data 32K (x4)
L1 Instruction 32K (x4)
L2 Unified 262K (x4)
L3 Unified 6291K (x1)
----------------------------------------------------------------------------------------------------------
Benchmark Time CPU Iterations
----------------------------------------------------------------------------------------------------------
RandFloats/double_from_string_sstream 804 ns 820 ns 896000
RandFloats/double_from_string_strtod 163 ns 162 ns 5973333
RandFloats/double_from_string_strtod_fixed 175 ns 172 ns 5352107
RandFloats/double_from_string_strtod_fixed_const_ref 150 ns 152 ns 5352107
RandFloats/double_from_string_std_from_chars 87.1 ns 88.3 ns 9557333
RandFloatsComma/double_from_string_strtod_fixed_comma_ref 172 ns 173 ns 5146257
RandFloatsComma/double_from_string_strtod_fixed_comma_const_ref 180 ns 175 ns 5352107
2020-02-29 22:11:31 +13:00
