Re: Lua is faster than Java?
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- Subject: Re: Lua is faster than Java?
- From: Antero Vipunen <antero@...>
- Date: 2005年7月26日 16:04:43 +0700
Mike Pall wrote:
Here's the timing on a code snippet which alternates between
two opcodes (LOADBOOL and FORLOOP):
$ TIMEFORMAT="%U"
$ time lua -e 'local x; for i=1,1e8 do x = true end'
6.106
$ time luajit -e 'local x; for i=1,1e8 do x = true end'
0.893
Superior! Both your project and your knowledge!
But it could be faster. I experimented with compiling Lua to C few
month ago.(I planned and still planning to move to asm)
My recipe was:
`unwind' VM-switch into linear program with gotos, and do some high
level optimization based on my so-called soft-types-system and good
thinking.
For example: if the step, limit and start of for are integers why then
we use floating point arithmetic? If register where i-variable is stored
is not used in for-body at all, then why we waste time boxing value it
in the stackobject? Etc...
In my approach I trade dynamism and memory for speed.
Ad majorem Lua gloriam,
Antero Vipunen.