From 0272218eb99323eb3f799eaff15752355b1ce507 Mon Sep 17 00:00:00 2001 From: Evgenii Stratonikov Date: Wed, 28 Dec 2022 15:47:58 +0300 Subject: [PATCH] [#2184] compression: Properly calculate upper bound MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 --- CHANGELOG.md | 1 + go.mod | 2 +- go.sum | Bin 137417 -> 137419 bytes .../blobstor/compression/bench_test.go | 49 ++++++++++++++++++ .../blobstor/compression/compress.go | 3 +- 5 files changed, 53 insertions(+), 2 deletions(-) create mode 100644 pkg/local_object_storage/blobstor/compression/bench_test.go diff --git a/CHANGELOG.md b/CHANGELOG.md index fb101c32..bb2d871b 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -9,6 +9,7 @@ Changelog for NeoFS Node ### Removed ### Updated - `neo-go` to `v0.100.1` +- `github.com/klauspost/compress` to `v1.15.13` ### Updating from v0.35.0 diff --git a/go.mod b/go.mod index 41bc5548..9ad0843d 100644 --- a/go.mod +++ b/go.mod @@ -14,7 +14,7 @@ require ( github.com/google/go-github/v39 v39.2.0 github.com/google/uuid v1.3.0 github.com/hashicorp/golang-lru v0.5.4 - github.com/klauspost/compress v1.15.9 + github.com/klauspost/compress v1.15.13 github.com/mitchellh/go-homedir v1.1.0 github.com/mr-tron/base58 v1.2.0 github.com/multiformats/go-multiaddr v0.4.0 diff --git a/go.sum b/go.sum index 2837e39d3760ab85f68fff1e07d08f2274f80afd..5487b0e873f6bf9b6b49e00d76a8789b874c8a7c 100644 GIT binary patch delta 133 zcmX@Pk>m76jt!c73=NGHG7PQ!-0}>=i!74U@>27Hy@DN0%yN7RP0Br-lbx!(LxQvN zoIF!2Tzq}~!we=z?oqQaG}ceg*UQaM0cj2lD6h(OboR;$4RI^Z3-<7^G&Tt{E6*<| ksZ35Qa&hs>^DxgSa|=sy_noZ1*Q)u$p6ws@Fy4#?03fC?YXATM delta 131 zcmX@Tk>lh>jt!c73@jBg46Vw&gR&ybyn;$xQi@zH3(FHtlJuQ33(Osz{fjd~Jxz*p z3!DQJ^9r+qBPU1gQ8TyHPtVuO%})X84ai82GVo0b@k`DOcQY<3Dy;}g_pb0X^~+B7 i@F?;Kbtwrmi7YpANXthv{!`O}{5pY|}`j0OM}mN3Ww diff --git a/pkg/local_object_storage/blobstor/compression/bench_test.go b/pkg/local_object_storage/blobstor/compression/bench_test.go new file mode 100644 index 00000000..6e05366c --- /dev/null +++ b/pkg/local_object_storage/blobstor/compression/bench_test.go @@ -0,0 +1,49 @@ +package compression + +import ( + "crypto/rand" + "fmt" + "testing" + + "github.com/stretchr/testify/require" +) + +func BenchmarkCompression(b *testing.B) { + c := Config{Enabled: true} + require.NoError(b, c.Init()) + + for _, size := range []int{128, 1024, 32 * 1024, 32 * 1024 * 1024} { + b.Run(fmt.Sprintf("size=%d", size), func(b *testing.B) { + b.Run("zeroed slice", func(b *testing.B) { + data := make([]byte, size) + benchWith(b, c, data) + }) + b.Run("not so random slice (block = 123)", func(b *testing.B) { + data := notSoRandomSlice(size, 123) + benchWith(b, c, data) + }) + b.Run("random slice", func(b *testing.B) { + data := make([]byte, size) + rand.Read(data) + benchWith(b, c, data) + }) + }) + } +} + +func benchWith(b *testing.B, c Config, data []byte) { + b.ResetTimer() + b.ReportAllocs() + for i := 0; i < b.N; i++ { + _ = c.Compress(data) + } +} + +func notSoRandomSlice(size, blockSize int) []byte { + data := make([]byte, size) + rand.Read(data[:blockSize]) + for i := blockSize; i < size; i += blockSize { + copy(data[i:], data[:blockSize]) + } + return data +} diff --git a/pkg/local_object_storage/blobstor/compression/compress.go b/pkg/local_object_storage/blobstor/compression/compress.go index 44b83d41..6cab3c29 100644 --- a/pkg/local_object_storage/blobstor/compression/compress.go +++ b/pkg/local_object_storage/blobstor/compression/compress.go @@ -86,7 +86,8 @@ func (c *Config) Compress(data []byte) []byte { if c == nil || !c.Enabled { return data } - return c.encoder.EncodeAll(data, make([]byte, 0, len(data))) + maxSize := c.encoder.MaxEncodedSize(len(data)) + return c.encoder.EncodeAll(data, make([]byte, 0, maxSize)) } // Close closes encoder and decoder, returns any error occurred.