zstd: Improve best compression #360
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See if we can find a better match by checking where the current best ends. Use that offset to see if we can find a better full match. Before/after. Ignore speed, may not be comparable: ``` gob-stream zskp 4 1911399616 171537212 32113 56.76 gob-stream zskp 4 1911399616 167273881 29337 62.13 enwik9 zskp 4 1000000000 276609671 44029 21.66 enwik9 zskp 4 1000000000 275241169 36430 26.18 github-june-2days-2019.json zskp 4 6273951764 512796117 97791 61.18 github-june-2days-2019.json zskp 4 6273951764 503314661 93811 63.78 nyc-taxi-data-10M.csv zskp 4 3325605752 495986829 89368 35.49 nyc-taxi-data-10M.csv zskp 4 3325605752 490907191 65939 48.10 ```
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This includes the following zstd improvement since v1.12.1: * Add helpers to compress/decompress zstd inside zip files klauspost/compress#363 * Improve best compression klauspost/compress#360 * Improve better compression klauspost/compress#364 * Improve compression with dictionaries too klauspost/compress#365
mostynb
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This includes the following zstd improvement since v1.12.1: * Add helpers to compress/decompress zstd inside zip files klauspost/compress#363 * Improve best compression klauspost/compress#360 * Improve better compression klauspost/compress#364 * Improve compression with dictionaries too klauspost/compress#365
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See if we can find a better match by checking where the current best ends.
Use that offset to see if we can find a better full match.
Before/after. Ignore speed, may not be comparable: