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14064 :: chronos 4.4.0: The HTTP refresh

• arnetheduck (orginal) [2026-07-17T14:32:51+02:00] view original

  The 4.4.0 release of nim-chronos is out with several improvements, chief among them:

  • a new AsyncStream implementation to speed up the HTTP client - up to ~10x throughput improvement for HTTP transfers (!) thanks to this and a few other tricks
  • RFC 9112 alignment / refresh - ie both client and server more closely follow larger parts of the spec (things like CONNECT tunneling, "correcter" Transfer/Content-Encoding parsing, etc)
  • ALPN support for TLS
  • Finally enables sink for Future (!) - gated on using a new-enough Nim that has the prerequisite bugfixes

  If you're new to chronos, you'll appreciate the new HTTP tutorials for the client and server - the porting guide has been around for a while as well, in case you're coming from std/asyncdispatch.

  Chronos is not the only thing that got documented - nim-json-rpc has a new guide and also received some major updates, benefiting from the improved HTTP performance and fixes.

  While we're on the topic of networking, there's also a new chronos-based wrapper for lsquic - it's being used in libp2p but can also be used standalone for all your QUIC needs.

  Thanks to everyone that contributed to this release!

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