File

net.http: Send entire HTTP request header as one write When opportunistic writes are enabled this reduces the number of syscalls and TCP packets sent on the wire. Experiments with TCP Fast Open made this even more obvious. That table trick probably wasn't as efficient. Lua generates bytecode for a table with zero array slots and space for two entries in the hash part, plus code to set [2] and [4]. I didn't verify but I suspect it would have had to resize the table when setting [1] and [3], although probably only once. Concatenating the strings directly in Lua is easier to read and involves no extra table or function call.

Welcome hackers!

This project accepts and *encourages* contributions. If you would like to get 
involved you can join us on our mailing list and discussion rooms. More 
information on these at https://prosody.im/discuss

Patches are welcome, though before sending we would appreciate if you read 
docs/coding_style.md for guidelines on how to format your code, and other tips.

Documentation for developers can be found at https://prosody.im/doc/developers

Have fun :)