[MuffinFlavored]

> The holy grail of code reloading is to upgrade the code of a HTTP server while it is running and without disturbing any requests being processed. Very few languages except for Erlang are able to do that correctly. Some languages claim to support that, but when you experiment with them you discover "quirks" making it impossible in practice.

You can kind of do it with node.js, but man do things get ugly fast when you manage state/connections in modules on reload.

[muddybytes]

in the olden days there was a “copyover” patch for a MUD codebase that allowed hot reloading with hundreds of active sockets in a single threaded app.