perf: optimize it.Find to avoid unnecessary allocations#811
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samber merged 2 commits intosamber:masterfrom Feb 24, 2026
Merged
perf: optimize it.Find to avoid unnecessary allocations#811samber merged 2 commits intosamber:masterfrom
samber merged 2 commits intosamber:masterfrom
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Replace First(Filter(collection, predicate)) with direct loop implementation.
The direct loop with early return eliminates intermediate iterator
creation from Filter() and First() functions.
Benchmark results:
│ old.txt │ new.txt │
│ sec/op │ sec/op vs base │
ItFind/ints_10-4 521.3n ± 14% 157.3n ± 8% -69.82% (p=0.000 n=8)
ItFind/ints_100-4 1.913µ ± 13% 1.545µ ± 22% -19.26% (p=0.002 n=8)
ItFind/ints_1000-4 17.07µ ± 7% 12.88µ ± 1% -24.59% (p=0.000 n=8)
geomean 2.573µ 1.462µ -43.15%
│ old.txt │ new.txt │
│ B/op │ B/op vs base │
ItFind/ints_10-4 192.0 ± 0% 0.0 ± 0% -100.00% (p=0.000 n=8)
ItFind/ints_100-4 192.0 ± 0% 0.0 ± 0% -100.00% (p=0.000 n=8)
ItFind/ints_1000-4 192.0 ± 0% 0.0 ± 0% -100.00% (p=0.000 n=8)
│ old.txt │ new.txt │
│ allocs/op │ allocs/op vs base │
ItFind/ints_10-4 7.000 ± 0% 0.000 ± 0% -100.00% (p=0.000 n=8)
ItFind/ints_100-4 7.000 ± 0% 0.000 ± 0% -100.00% (p=0.000 n=8)
ItFind/ints_1000-4 7.000 ± 0% 0.000 ± 0% -100.00% (p=0.000 n=8)
samber
approved these changes
Feb 24, 2026
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Replace First(Filter(collection, predicate)) with direct loop implementation.
The direct loop with early return eliminates intermediate iterator creation from Filter() and First() functions.
Benchmark results: