replaceShortenedKeysInBranch: less re-allocs#19584
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AskAlexSharov merged 7 commits intomainfrom Mar 4, 2026
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old `aux` buffer often did re-alloc (16children * 32hashlen = 368 > 256) ``` ┌───────────────────┬────────┬────────┬───────────┐ │ Pattern │ ns/op │ B/op │ allocs/op │ ├───────────────────┼────────┼────────┼───────────┤ │ fresh-make (old) │ 315 ns │ 1408 B │ 2 allocs │ ├───────────────────┼────────┼────────┼───────────┤ │ reuse-clone (new) │ 248 ns │ 704 B │ 1 alloc │ └───────────────────┴────────┴────────┴───────────┘ ```
sudeepdino008
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old `aux` buffer often did re-alloc (16children * 32hashlen = 368 > 256) ``` ┌───────────────────┬────────┬────────┬───────────┐ │ Pattern │ ns/op │ B/op │ allocs/op │ ├───────────────────┼────────┼────────┼───────────┤ │ fresh-make (old) │ 315 ns │ 1408 B │ 2 allocs │ ├───────────────────┼────────┼────────┼───────────┤ │ reuse-clone (new) │ 248 ns │ 704 B │ 1 alloc │ └───────────────────┴────────┴────────┴───────────┘ ```
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old
auxbuffer often did re-alloc (16children * 32hashlen = 368 > 256)