7 stories tagged compiler-optimization, newest first.
11 points by signa11 | 9 comments
Blog post demonstrating with GCC and Clang assembly output that undefined behavior in C/C++ can cause unexpected effects like falling through into unrelated functions.
18 points by hnp9j9qtda | 3 comments
A Percona blog post, the second in a series, on whether profile-guided optimization (PGO) compiler builds improve MySQL database performance.
34 points by ingve | 16 comments
A blog post explaining type punning in C and C++, covering which techniques are defined behavior versus undefined behavior and why casts can break under optimization.
356 points by vismit2000 | 62 comments
Matt Godbolt announces the Advent of Compiler Optimisations 2025, a daily blog post and video series in December covering C and C++ compiler optimisations.
386 points by gnabgib | 130 comments
Blog post by Falk Hüffner explaining a leap year check for years 0–102499 using a multiply, mask, and compare in about three CPU instructions.
513 points by jeffbee | 323 comments
A GitHub Gist explaining how rebuilding Ubuntu's jq package from the same source with different build options yields about 90% better performance.
381 points by 414owen | 197 comments
Blog post that takes a clang-compiled C loop and hand-tweaks the x86 assembly in various ways, measuring the speedup of each change.