1. zstd (Zstandard) content-encoding

    Data compression method providing faster page loading while using less CPU power on the server.

  2. compressionstream api: `compressionstream()` constructor: "zstd" compression

  3. decompressionstream api: `decompressionstream()` constructor: "zstd" compression

  4. headers http header: accept-encoding: zstd

  5. headers http header: content-encoding: zstd