017d8937fa
This compresses multiple files in parallel, and will split up larger files (5MB+) into smaller chunks (1MB) to compress in parallel. There is a small size overhead to recombine the chunks, but it's only a few bytes per chunk, so for a 1MB chunk, it's minimal. Rough numbers, with everything in the page cache, this can compress ~4GB (1000 files) down to 1GB in 6.5 seconds, instead of 120 seconds with the non-parallel soong_jar and 150 seconds with zip. Go's DEFLATE algorithm is still a bit worse than zip's -- about 3.5% larger file sizes, but for most of our "dist" targets that is fine. Change-Id: Ie4886c7d0f954ace46e599156e35fea7e74d6dd7 |
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