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Reduce crc32 benchmark memory usage

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Reset the length of the slice where save the result to recycle the same allocated memory and prevent further allocations.
The Sum function uses append, so the length of the "in" slice increased with each cycle of the benchmark.
This commit is contained in:
Erik Pellizzon 2022-09-14 11:06:42 +01:00
parent 7d1bf79faa
commit b8777ee213
1 changed files with 3 additions and 0 deletions
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3
src/hash/crc32/crc32_test.go
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@ -329,11 +329,14 @@ func benchmark(b *testing.B, h hash.Hash32, n, alignment int64) {
h.Reset() h.Reset()
h.Write(data) h.Write(data)
h.Sum(in) h.Sum(in)
// Avoid further allocations
in = in[:0]
b.ResetTimer() b.ResetTimer()
for i := 0; i < b.N; i++ { for i := 0; i < b.N; i++ {
h.Reset() h.Reset()
h.Write(data) h.Write(data)
h.Sum(in) h.Sum(in)
in = in[:0]
} }
} }