Improving performance of Lua on low-end systems

[Rena <hyperhacker@...>]

I'm using Lua in a homebrew PSP app (not PS Vita, the original PSP
with 32-64MB RAM and ~333mhz MIPS CPU) and finding performance has
dropped rather sharply (compared to original app which didn't use
Lua). It's using Lua 5.2, though compiling another version for it
wouldn't be out of the question. The main loop isn't doing a lot of
work, but makes multiple calls to C functions (read the button states,
draw things on the screen, read the clock). Does anyone have advice to
improve performance?

-- 
Sent from my Game Boy.