zstd beats gzip on both speed and size, for every compression level. If you need compatibility then gzip (pigz) or zip (7z) or bz2 (pbzip2) are the best of wor

zstd beats gzip on both speed and size, for every compression level. If you need compatibility then gzip (pigz) or zip (7z) or bz2 (pbzip2) are the best of worse outcomes, but for Pareto front optimal speed and size you want zstd.