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flate: Improve level 5+6 compression #656

Merged
merged 1 commit into from Sep 7, 2022
Merged

flate: Improve level 5+6 compression #656

merged 1 commit into from Sep 7, 2022

Commits on Sep 7, 2022

  1. flate: Improve level 5+6 compression 

    Skip 2 bytes when doing end-of-match search.

This allows better matches to be picked up further forward, adding up to 2 literals, but giving a better match.

Level 5:

nyc: 779171549 -> 767765165
github-june: 943488021 -> 938777887
github-ranks: 435111686 -> 435008334
sofia: 3083510553 -> 3048677443

level6, nyc: 768119006 -> 753545897

Performance unchanged.
    @klauspost
    klauspost committed Sep 7, 2022
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