using-rust-in-non-rust-servers

I believe the difference is that the JS version specifies compression strategy 3 (Z_RLE)[0][1], whereas the Rust crate is using the default compression strategy[2]. Both otherwise use the same underlying compression library (deflate aka zlib) and the same compression level (9). [0]: https://github.com/pretzelhammer/using-rust-in-non-rust-serv... [1]: https://zlib.net/manual.html#Advanced:~:text=The%20strategy%... [2]: https://github.com/rust-lang/flate2-rs/blob/1a28821dc116dac1... Edit: Nevermind. If you look at the actual generated files, they're 594 and 577 bytes respectively. This is mostly HTTP headers. [3]: https://github.com/pretzelhammer/rust-blog/blob/master/asset... [4]: https://github.com/pretzelhammer/rust-blog/blob/master/asset...