Zopfli can reduce the size of files beyond what a simple gzip pass can, but it takes much longer to compress. I think it’s unreasonable to expect Netlify to compress responses with zopfli transparently, but we could achieve the same gains by compressing files in the build process. It would then be up to Netlify to look for a <filename.gz> and serve that if present, instead of gzipping “on the fly”.
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