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.

Structure of a stanza:


stanza {
	--- properties ---
	tags -- array of tags
	
	--- static methods ---
	iq(attrs) -- 
	
	--- read-only methods ---
	reply -- return new stanza with attributes of current stanza
	child_with_name(string name) -- return the first child of the current tag with the matching name
	
	--- write methods ---
	tag(name, sttrs) -- create a new child of the current tag, and set the child as current
	up() -- move to the parent of the current tag
	text(string) -- append a new text node to the current tag
}