Comment by tumultco

I was curious about this myself. I extracted the json for the "uncompressed" image:

https://gist.github.com/jmfd/8dbb96fcd8a1ba1e8ad6e9167bd70ce...

And then tried these commands against it:

  gzip:        39.56kb    (93.7%)
  zstd:        35.86kb    (94.3%)
  gzip -9:     35.51kb    (94.4%)
  bzip2:       24.35kb    (96.1%)
  zstd -19:    24.01kb    (96.2%)
  brotli:      21.42kb    (96.6%)

(I'm not up-to-date on default web server configs, but I imagine most would automatically transmit with gzip over the wire for json?)