Re: Profiling LPEG

[Sean Conner <sean@...>]

It was thus said that the Great Roberto Ierusalimschy once stated:
> > > Quick comparison:
> > > -----------------------------------------------------------
> > > local P = lpeg.P"hello world"    -- pattern in a Lua variable
> > > (P * P * P):ptree()
> > > -- tree has 66 lines
> > > 
> > > local P = lpeg.V"P"         -- pattern in a grammar rule
> > > lpeg.P{P * P * P, P = lpeg.P"hello world"}:ptree()
> > > -- tree has 32 lines
> > > -----------------------------------------------------------
> > 
> >   I see.  Although, when I tried the above as-is, I got:
> > 
> > lua: ll.lua:3: attempt to perform arithmetic on a nil value (global 'P')
> > stack traceback:
> > 	ll.lua:3: in main chunk
> > 	[C]: in ?
> 
> Sorry. Line 3 should start with a ';', otherwise Lua is reading it
> as an argument in a call from the previous line:

  Wow!  I use semicolons so seldom (as in, never) that it never occured to
me to use one.  Thanks.

  -spc