Observed arrival · 2026-10-26
PeriPragmaton’s notes from the performance edge
An independent technical blog examines where hardware, compilers, and runtimes diverge from programmers’ expectations, pairing posts with code and benchmarks.
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- Systems programmers and compiler-performance readers
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- The recent archive spans profile-guided optimization, instruction-cache pressure, and cache aliasing, with posts dated October 2026.
Field notes
The archive frames performance as a gap between a programmer’s mental model and what hardware or a compiler actually does. Its examples include profile-guided optimization on a toy interpreter and SQLite, plus a cache-aliasing case where the author reports an eightfold slowdown for a power-of-two-sized matrix layout. The homepage links to the code repository and says the posts include the benchmarks behind their numbers.
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