[terrelln]

The latest Zstandard exposes several parameters which are useful for reducing time to first byte latency in web compression. They make Zstandard cut the compressed data into smaller blocks, e.g. 4 KB, with the goal to fit a compressed block within a small number of packets, so the browswer can start to decompress without waiting for a full 128 KB block to be sent.

These parameters are described in the v1.5.6 release notes [0]. ZSTD_c_targetCBlockSize is the most notable, but ZSTD_c_maxBlockSize can also be used for a lower CPU cost but larger compressed size.

Are you using these features at Cloudflare? If you need any help using these, or have any questions, please open an issue on Zstandard's GitHub!

[0] https://github.com/facebook/zstd/releases/tag/v1.5.6