s2: Avoid Decode size checks #328
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Add another decode loop that doesn't check sizes as long as src is big enough. For now only in Go version. Streams: ``` Before: Decompressing. 426243297 -> 1000000000 [234.61%]; 1.941s, 491.3MB/s After: Decompressing. 426243297 -> 1000000000 [234.61%]; 1.895s, 503.3MB/s ``` Some blocks like it a lot: ``` BenchmarkDecodeS2Block/4-pdf/block-32 379 336 -11.35% BenchmarkDecodeS2Block/4-pdf/block-better-32 691 630 -8.83% BenchmarkDecodeS2Block/4-pdf/block-best-32 816 702 -13.97% BenchmarkDecodeS2Block/5-html4/block-32 13645 8727 -36.04% BenchmarkDecodeS2Block/5-html4/block-better-32 14059 9204 -34.53% BenchmarkDecodeS2Block/5-html4/block-best-32 13729 8975 -34.63% ```
This was referenced Mar 8, 2021
klauspost
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Mar 10, 2021
Relevant updates: * Less allocations on decode: klauspost/compress#322 * Fixed rare out-of-bounds write on amd64. * ARM64 decompression assembly. Around 2x output speed. klauspost/compress#324 * Speed up decompression on non-assembly platforms. klauspost/compress#328 Upgrade cpuid to match simdjson.
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harshavardhana
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Mar 10, 2021
Relevant updates: * Less allocations on decode: klauspost/compress#322 * Fixed rare out-of-bounds write on amd64. * ARM64 decompression assembly. Around 2x output speed. klauspost/compress#324 * Speed up decompression on non-assembly platforms. klauspost/compress#328 Upgrade cpuid to match simdjson.
This was referenced Mar 11, 2021
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Add another decode loop that doesn't check sizes as long as src is big enough.
For now only in Go version.
Streams:
Some blocks like it a lot: