Evgenii Stratonikov
0272218eb9
If the data is not compressible allocating `len(data)` will lead to a slice reallocation. For a compressible data the results for small size are flaky and we allocate a bit more. However, it feels right to use a provided function if we need to pick any size at all. ``` name old time/op new time/op delta Compression/size=128/zeroed_slice-8 2.23µs ±12% 2.06µs ± 6% -7.35% (p=0.009 n=10+10) Compression/size=128/not_so_random_slice_(block_=_123)-8 19.0µs ±10% 15.8µs ±16% -17.09% (p=0.000 n=9+10) Compression/size=128/random_slice-8 17.6µs ±15% 16.1µs ±16% ~ (p=0.075 n=10+10) Compression/size=1024/zeroed_slice-8 3.05µs ±11% 2.84µs ±10% ~ (p=0.089 n=10+10) Compression/size=1024/not_so_random_slice_(block_=_123)-8 18.1µs ± 6% 18.2µs ±12% ~ (p=0.971 n=10+10) Compression/size=1024/random_slice-8 48.6µs ± 6% 45.6µs ± 5% -6.07% (p=0.006 n=10+9) Compression/size=32768/zeroed_slice-8 26.8µs ± 3% 28.7µs ± 8% +7.23% (p=0.001 n=10+10) Compression/size=32768/not_so_random_slice_(block_=_123)-8 44.3µs ± 8% 43.7µs ±13% ~ (p=0.762 n=8+10) Compression/size=32768/random_slice-8 97.3µs ±32% 68.9µs ±15% -29.13% (p=0.000 n=10+10) Compression/size=33554432/zeroed_slice-8 29.8ms ± 9% 30.3ms ±17% ~ (p=1.000 n=9+9) Compression/size=33554432/not_so_random_slice_(block_=_123)-8 33.1ms ±14% 30.3ms ±11% -8.61% (p=0.043 n=10+10) Compression/size=33554432/random_slice-8 41.7ms ± 3% 30.1ms ± 8% -27.72% (p=0.000 n=9+10) name old alloc/op new alloc/op delta Compression/size=128/zeroed_slice-8 128B ± 0% 144B ± 0% +12.50% (p=0.000 n=10+10) Compression/size=128/not_so_random_slice_(block_=_123)-8 384B ± 0% 144B ± 0% -62.50% (p=0.000 n=10+10) Compression/size=128/random_slice-8 384B ± 0% 144B ± 0% -62.50% (p=0.000 n=10+10) Compression/size=1024/zeroed_slice-8 1.02kB ± 0% 1.15kB ± 0% +12.50% (p=0.000 n=10+10) Compression/size=1024/not_so_random_slice_(block_=_123)-8 1.02kB ± 0% 1.15kB ± 0% +12.50% (p=0.000 n=10+10) Compression/size=1024/random_slice-8 2.56kB ± 0% 1.15kB ± 0% -55.00% (p=0.000 n=10+10) Compression/size=32768/zeroed_slice-8 32.8kB ± 0% 41.0kB ± 0% +25.00% (p=0.000 n=10+10) Compression/size=32768/not_so_random_slice_(block_=_123)-8 32.8kB ± 0% 41.0kB ± 0% +25.00% (p=0.000 n=10+10) Compression/size=32768/random_slice-8 81.9kB ± 0% 41.0kB ± 0% -50.00% (p=0.000 n=10+10) Compression/size=33554432/zeroed_slice-8 33.6MB ± 0% 33.6MB ± 0% +0.02% (p=0.000 n=9+9) Compression/size=33554432/not_so_random_slice_(block_=_123)-8 33.6MB ± 0% 33.6MB ± 0% +0.02% (p=0.000 n=8+10) Compression/size=33554432/random_slice-8 75.5MB ± 0% 33.6MB ± 0% -55.55% (p=0.000 n=10+10) name old allocs/op new allocs/op delta Compression/size=128/zeroed_slice-8 1.00 ± 0% 1.00 ± 0% ~ (all equal) Compression/size=128/not_so_random_slice_(block_=_123)-8 2.00 ± 0% 1.00 ± 0% -50.00% (p=0.000 n=10+10) Compression/size=128/random_slice-8 2.00 ± 0% 1.00 ± 0% -50.00% (p=0.000 n=10+10) Compression/size=1024/zeroed_slice-8 1.00 ± 0% 1.00 ± 0% ~ (all equal) Compression/size=1024/not_so_random_slice_(block_=_123)-8 1.00 ± 0% 1.00 ± 0% ~ (all equal) Compression/size=1024/random_slice-8 2.00 ± 0% 1.00 ± 0% -50.00% (p=0.000 n=10+10) Compression/size=32768/zeroed_slice-8 1.00 ± 0% 1.00 ± 0% ~ (all equal) Compression/size=32768/not_so_random_slice_(block_=_123)-8 1.00 ± 0% 1.00 ± 0% ~ (all equal) Compression/size=32768/random_slice-8 2.00 ± 0% 1.00 ± 0% -50.00% (p=0.000 n=10+10) Compression/size=33554432/zeroed_slice-8 1.00 ± 0% 1.00 ± 0% ~ (all equal) Compression/size=33554432/not_so_random_slice_(block_=_123)-8 1.00 ± 0% 1.00 ± 0% ~ (all equal) Compression/size=33554432/random_slice-8 2.00 ± 0% 1.00 ± 0% -50.00% (p=0.000 n=10+10) ``` Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com> |
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| .. | ||
| blobovnicza | ||
| blobstor | ||
| engine | ||
| internal | ||
| metabase | ||
| pilorama | ||
| shard | ||
| util | ||
| writecache | ||