jpegtran

There's a huge problem with these improvements. They rarely make it to the original project. Luckily, the SIMD acceleration for progressive Huffman encoding was a rare exception [1]. So, alone with other improvements, it made this fork [2] rather pointless. Adding the NEON optimizations would have been easier with a proper rebase, and that would require less work for both to keep things up to date. [1] https://github.com/libjpeg-turbo/libjpeg-turbo/pull/46 [2] https://github.com/cloudflare/jpegtran

I ended up writing asm for the important part: https://github.com/cloudflare/jpegtran/blob/vlad/arm/jchuff_...