Evaluate hex encoding for embedding files?
#7,211 opened on Oct 2, 2018
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Description
It was just pointed out to me in a Hacker News thread that hex might be more efficient than base64 after gzip/brotli compression for SINGLE_FILE's embedding.
His test showed that a hex-encoded wasm file was 65% the size of a base64-encoded wasm file after compression. My own test with a random 4.7 MB png I had sitting around showed that it didn't make a difference — with brotli they were all about the same (hex having the edge over base64 by 215 B and over the compressed original file by ~2.5 KB) and gzip was similar (in this case hex was ~600 KB bigger) — so it's unclear what the impact would be.
Just calling attention to this on the off chance that it would actually be an improvement, as I don't recall hex being considered when originally writing the SINGLE_FILE PR, and the previous discussion on encoding efficiencies (https://github.com/kripken/emscripten/pull/3326#issuecomment-91352434) has no mention of hex.
