Re: Vague question about lpeg performance

[Stefan <stefan@...>]

Jerome Vuarand wrote:
> 2010/4/2 Stefan <stefan@chehalispost.com>:
> > Perhaps a benchmark is in order?
> >
> > YAJL is reportedly among the fastest C JSON libs around. There is a Lua
> > module for it here:
> >
> > http://github.com/brimworks/lua-yajl/
> >
> > A trivial bench between lua-yajl and json4lua encoding a small array 100,000
> > times shows this:
> >
> > alpha# time lua-5.1 yajltest.lua
> > 3.967u 0.000s 0:03.97 99.7%     177+983k 0+0io 0pf+0w
> >
> > alpha# time lua-5.1 jsontest.lua
> > 9.170u 0.000s 0:09.17 100.0%    175+973k 0+0io 0pf+0w
> >
> > 230% faster is what I am seeing - YMMV
>
> Thanks for the tip. lua-yajl decoding seems to be about 18% faster
> than luajson, and encoding is 400% faster. But it seems to be a work
> in progress, and it's less complete than luajson, so I guess I won't
> switch just now.

Is that using the "recommended" Lua to_value(string) decoding 
convenience function? If so, then once it is implemented within the C 
module itself one would expect to see equally impressive improvement (as 
encoding)

But yes, I think he 1.0ed it a wee bit too soon...