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- Subject: How can I optimize my metatables?
- From: "Soni \"They/Them\" L." <fakedme@...>
- Date: Thu, 30 Nov 2017 20:38:41 -0200
I have some code that looks like this:
local mt = metatables[coroutine.running()].string
if mt then
local __index = rawget(mt, "__index")
if type(__index) == "function" then
It takes the metatables for the basic Lua types (string, number, nil,
etc) and replaces them with a proxy metatable. This proxy metatable
forwards to a different table based on the currently running coroutine.
This gives me virtualization of those metatables.
It's really slow (3-4x slower than the default string metatable) and
I'd like to make it faster. Is that possible?
 - I haven't actually benchmarked it, but default string metatable
gives about 2 table accesses per operation; this thing does at least 8
when using globals, and that doesn't take into account interpreter
overhead and all the function calls!
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