On Mon, Aug 17, 2020 at 8:02 AM Steven D'Aprano <st...@pearwood.info> wrote:
> Perhaps I have misunderstood, but isn't this a pure implementation > change, with no user visible API changes and backward compatible output? > According to the documentation [1], it only supports compression levels 0-3. They're supposed to be comparable in ratio to zlib's levels 0-3. I found benchmarks [2] of an older version that only had compression level 1, which shows its ratio being quite a bit worse than zlib's level 1, but maybe they've improved it. The library interface seems similar, but it isn't drop-in compatible. It doesn't appear to have equivalents of inflateCopy and deflateCopy, which are exposed by Python's standard binding. There may be other missing features that I didn't notice. The streams it produces are of course standard-compliant, and decompression works with any standard-compliant stream, and is probably always faster than zlib. [1] https://01.org/sites/default/files/documentation/isa-l_api_2.28.0.pdf [2] https://ci.spdk.io/download/events/2018-summit-prc/08_Liu_Xiaodong_&_Hui_Chunyang_ISA-L_Update_and_Usercase_Sharing_SPDK_Summit_2018_China.pdf
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