Hi Paul,
I got a 2x speedup by making two changes.
1) adding some type declarations to the vm and insn tuples:
TUPLE: peg-vm { str string } { insns vector } { pc fixnum } { pos
fixnum } { stack vector } { cap vector } ;
TUPLE: insn { type fixnum } { off fixnum } aux ;
To get the latter to work I had to change some f's to 0 in the insn
constructors. This didn't seem to break anything.
2) changing the two nth calls to nth-unsafe.
Slava
On Sun, Jan 25, 2009 at 9:18 AM, Paul Moore <[email protected]> wrote:
> 2009/1/25 Slava Pestov <[email protected]>:
>> Perhaps you can share your code and I might be able to give additional
>> hints. I'm really keen on closing this 10x performance gap with C.
>
> No problem. I'd not done so before purely because I didn't want to
> just dump a "please fix my code" posting on the list :-)
>
> I've uploaded my code to Bitbucket (I use Mercurial rather than git -
> hope that's OK). You can get the current version from
> http://bitbucket.org/pmoore/factor-peg/raw/ca3cd70af2a0/lpeg.factor or
> look at the whole repository at
> http://bitbucket.org/pmoore/factor-peg/
>
> I think the key areas for improvement now are the any and char opcodes
> - those are the ones used in the inner loop in my current tests (if I
> do 3000000 test-vm 10 do-test-run print-timings, those opcodes run 30m
> times each). The jmp opcode is also used that many times, but that
> looks faily tight to me...
>
> Thanks for the interest!
>
> Paul.
>
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