[all-commits] [llvm/llvm-project] 67ce4a: [llvm][mustache] Use single pass when tokenizing (...

[Paul Kirth via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 67ce4aba26172cda8fed90077e3393e98c22d2d2
      https://github.com/llvm/llvm-project/commit/67ce4aba26172cda8fed90077e3393e98c22d2d2
  Author: Paul Kirth <paulkirth at google.com>
  Date:   2025-11-04 (Tue, 04 Nov 2025)

  Changed paths:
    M llvm/lib/Support/Mustache.cpp

  Log Message:
  -----------
  [llvm][mustache] Use single pass when tokenizing (#159196)

The old implementation used many string searches over the same portions
of the strings. This version sacrifices some API niceness for perf wins.

| Metric | Baseline | Single-Pass | Change |
| --- | --- | --- | --- |
| Time (ms) | 36\.09 | 35\.78 | \-0.86% |
| Cycles | 35\.3M | 35\.0M | \-0.79% |
| Instructions | 86\.7M | 85\.8M | \-1.03% |
| Branch Misses | 116K | 114K | \-1.91% |
| Cache Misses | 244K | 232K | \-4.98% |



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