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3579782a44
This patch switches the compressor from Gzip to ZStandard for ssate cache files. Zstandard compression provides a significant improvement in decompression speed as well as improvement in compression speed and disk usage over the 'tgz' format in use. Furthermore, its configurable compression level offers a trade-off between time spent compressing sstate cache files and disk space used by those files. The reduced disk usage also contributes to saving network traffic for those sharing their sstate cache with others. Zstandard should therefore be a good choice when: * disk space is at a premium * network speed / resources are limited * the CI server can sstate packages can be created at high compression * less CPU on the build server should be used for sstate decompression (From OE-Core rev: 0710e98f40ec7394567ede1f88f7c7bae306b925) Signed-off-by: Henry Kleynhans <hkleynhans@fb.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>