mirror of
https://github.com/restic/restic.git
synced 2024-12-25 17:27:25 +00:00
3 commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
Michael Eischer
|
6fb408d90e | repository: implement pack compression | ||
|
greatroar
|
8d2996eaaa |
Replace siphash by hash/maphash
In Go 1.17.1, maphash has become quite a bit faster than siphash, so we can drop one third-party dependency. maphash is just an interface to the standard Go map's hash function, which we already trust for other use cases. Benchmark results on linux/amd64, -benchtime=3s: name old time/op new time/op delta IndexHasUnknown-8 50.6ns ±10% 41.0ns ±19% -18.92% (p=0.000 n=9+10) IndexHasKnown-8 52.6ns ±12% 41.5ns ±12% -21.13% (p=0.000 n=9+10) IndexMapHash-8 3.64µs ± 1% 2.00µs ± 0% -45.09% (p=0.000 n=10+9) IndexAlloc-8 700ms ± 1% 601ms ± 6% -14.18% (p=0.000 n=8+10) IndexAllocParallel-8 205ms ± 5% 192ms ± 8% -6.18% (p=0.043 n=10+10) MasterIndexAlloc-8 319ms ± 1% 279ms ± 5% -12.58% (p=0.000 n=10+10) MasterIndexLookupSingleIndex-8 156ns ± 8% 147ns ± 6% -5.46% (p=0.023 n=10+10) MasterIndexLookupMultipleIndex-8 150ns ± 7% 142ns ± 8% -5.69% (p=0.007 n=10+10) MasterIndexLookupSingleIndexUnknown-8 74.4ns ± 6% 72.0ns ± 9% ~ (p=0.175 n=10+9) MasterIndexLookupMultipleIndexUnknown-8 67.4ns ± 9% 65.5ns ± 7% ~ (p=0.340 n=9+9) MasterIndexLookupParallel/known,indices=25-8 461ns ± 2% 445ns ± 2% -3.49% (p=0.000 n=10+10) MasterIndexLookupParallel/unknown,indices=25-8 408ns ±11% 378ns ± 5% -7.22% (p=0.035 n=10+9) MasterIndexLookupParallel/known,indices=50-8 479ns ± 1% 437ns ± 4% -8.82% (p=0.000 n=10+10) MasterIndexLookupParallel/unknown,indices=50-8 406ns ± 8% 343ns ±15% -15.44% (p=0.001 n=10+10) MasterIndexLookupParallel/known,indices=100-8 480ns ± 1% 455ns ± 5% -5.15% (p=0.000 n=8+10) MasterIndexLookupParallel/unknown,indices=100-8 391ns ±18% 382ns ± 8% ~ (p=0.315 n=10+10) MasterIndexLookupBlobSize-8 71.0ns ± 8% 57.2ns ±11% -19.36% (p=0.000 n=9+10) PackerManager-8 254ms ± 1% 254ms ± 1% ~ (p=0.285 n=15+15) name old speed new speed delta IndexMapHash-8 1.12GB/s ± 1% 2.05GB/s ± 0% +82.13% (p=0.000 n=10+9) PackerManager-8 208MB/s ± 1% 207MB/s ± 1% ~ (p=0.281 n=15+15) name old alloc/op new alloc/op delta IndexMapHash-8 0.00B 0.00B ~ (all equal) IndexAlloc-8 400MB ± 0% 400MB ± 0% ~ (p=1.000 n=9+10) IndexAllocParallel-8 401MB ± 0% 401MB ± 0% +0.00% (p=0.000 n=10+10) MasterIndexAlloc-8 258MB ± 0% 262MB ± 0% +1.42% (p=0.000 n=9+10) PackerManager-8 73.1kB ± 0% 73.1kB ± 0% ~ (p=0.382 n=13+13) name old allocs/op new allocs/op delta IndexMapHash-8 0.00 0.00 ~ (all equal) IndexAlloc-8 907k ± 0% 907k ± 0% -0.00% (p=0.000 n=10+10) IndexAllocParallel-8 907k ± 0% 907k ± 0% +0.00% (p=0.009 n=10+10) MasterIndexAlloc-8 327k ± 0% 317k ± 0% -3.06% (p=0.000 n=10+10) PackerManager-8 744 ± 0% 744 ± 0% ~ (all equal) |
||
|
greatroar
|
7bda28f31f |
Chaining hash table for repository.Index
These are faster to construct but slower to access. The allocation rate is halved, the peak memory usage almost halved compared to standard map. Benchmark results on linux/amd64, -benchtime=3s -count=20: name old time/op new time/op delta PackerManager-8 178ms ± 0% 178ms ± 0% ~ (p=0.231 n=20+20) DecodeIndex-8 4.54s ± 0% 4.30s ± 0% -5.20% (p=0.000 n=18+17) DecodeIndexParallel-8 4.54s ± 0% 4.30s ± 0% -5.22% (p=0.000 n=19+18) IndexHasUnknown-8 44.4ns ± 5% 50.5ns ±11% +13.82% (p=0.000 n=19+17) IndexHasKnown-8 48.3ns ± 0% 51.5ns ±12% +6.68% (p=0.001 n=16+20) IndexAlloc-8 758ms ± 1% 616ms ± 1% -18.69% (p=0.000 n=19+19) IndexAllocParallel-8 234ms ± 3% 204ms ± 2% -12.60% (p=0.000 n=20+18) MasterIndexLookupSingleIndex-8 122ns ± 0% 145ns ± 9% +18.44% (p=0.000 n=14+20) MasterIndexLookupMultipleIndex-8 369ns ± 2% 429ns ± 8% +16.27% (p=0.000 n=20+20) MasterIndexLookupSingleIndexUnknown-8 68.4ns ± 5% 74.9ns ±13% +9.47% (p=0.000 n=20+20) MasterIndexLookupMultipleIndexUnknown-8 315ns ± 3% 369ns ±11% +17.14% (p=0.000 n=20+20) MasterIndexLookupParallel/known,indices=5-8 743ns ± 1% 816ns ± 2% +9.87% (p=0.000 n=17+17) MasterIndexLookupParallel/unknown,indices=5-8 238ns ± 1% 260ns ± 2% +9.14% (p=0.000 n=19+20) MasterIndexLookupParallel/known,indices=10-8 1.01µs ± 3% 1.11µs ± 2% +9.79% (p=0.000 n=19+20) MasterIndexLookupParallel/unknown,indices=10-8 222ns ± 0% 269ns ± 2% +20.83% (p=0.000 n=16+20) MasterIndexLookupParallel/known,indices=20-8 1.06µs ± 2% 1.19µs ± 2% +12.95% (p=0.000 n=19+18) MasterIndexLookupParallel/unknown,indices=20-8 413ns ± 1% 530ns ± 1% +28.19% (p=0.000 n=18+20) SaveAndEncrypt-8 30.2ms ± 1% 30.4ms ± 0% +0.71% (p=0.000 n=19+19) LoadTree-8 540µs ± 1% 576µs ± 1% +6.73% (p=0.000 n=20+20) LoadBlob-8 5.64ms ± 0% 5.64ms ± 0% ~ (p=0.883 n=18+17) LoadAndDecrypt-8 5.93ms ± 0% 5.95ms ± 1% ~ (p=0.247 n=20+19) LoadIndex-8 25.1ms ± 0% 24.5ms ± 1% -2.54% (p=0.000 n=18+17) name old speed new speed delta PackerManager-8 296MB/s ± 0% 296MB/s ± 0% ~ (p=0.229 n=20+20) SaveAndEncrypt-8 139MB/s ± 1% 138MB/s ± 0% -0.71% (p=0.000 n=19+19) LoadBlob-8 177MB/s ± 0% 177MB/s ± 0% ~ (p=0.890 n=18+17) LoadAndDecrypt-8 169MB/s ± 0% 168MB/s ± 1% ~ (p=0.227 n=20+19) name old alloc/op new alloc/op delta PackerManager-8 91.8kB ± 0% 91.8kB ± 0% ~ (p=0.772 n=12+19) IndexAlloc-8 786MB ± 0% 400MB ± 0% -49.04% (p=0.000 n=20+18) IndexAllocParallel-8 786MB ± 0% 401MB ± 0% -49.04% (p=0.000 n=19+15) SaveAndEncrypt-8 21.0MB ± 0% 21.0MB ± 0% +0.00% (p=0.000 n=19+19) name old allocs/op new allocs/op delta PackerManager-8 1.41k ± 0% 1.41k ± 0% ~ (all equal) IndexAlloc-8 977k ± 0% 907k ± 0% -7.18% (p=0.000 n=20+20) IndexAllocParallel-8 977k ± 0% 907k ± 0% -7.17% (p=0.000 n=19+15) SaveAndEncrypt-8 73.0 ± 0% 73.0 ± 0% ~ (all equal) |