StarMirror/CppCoreGuidelines
1
0
Fork 0
mirror of https://github.com/isocpp/CppCoreGuidelines.git synced 2024-03-22 13:30:58 +08:00
Code Issues Projects Releases Wiki Activity

Merge pull request #531 from tituswinters/per-opt

Browse Source 
A more numeric reason for targeted optimization.
This commit is contained in:
Andrew Pardoe 2016-03-20 09:27:17 -07:00
commit 89cd79db3f
1 changed files with 7 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
CppCoreGuidelines.md
View File

@ -10006,7 +10006,13 @@ Optimizing a non-performance-critical part of a program has no effect on system
##### Note
If your program spends most of its time waiting for the web or for a human, optimization of in-memory computation is probably useless.
???
Put another way: If your program spends 4% of its processing time doing
computation A and 40% of its time doing computation B, a 50% improvement on A is
only as impactful as a 5% improvement on B. (If you don't even know how much
time is spent on A or B, see <a href="#Rper-reason">PER.1</a> and <a
href="#Rper-Knuth">PER.2</a>.)
### <a name="Rper-simple"></a>PER.4: Don't assume that complicated code is necessarily faster than simple code