POV-Ray : Newsgroups : povray.beta-test : Experimental v3.8.0-x.tokenizer.9960461 : Re: Experimental v3.8.0-x.tokenizer.9960461 Server Time
6 Dec 2021 16:10:37 EST (-0500)
  Re: Experimental v3.8.0-x.tokenizer.9960461  
From: jr
Date: 10 Dec 2018 08:15:00
Message: <web.5c0e65cc98d8491ae43b71790@news.povray.org>
hi,

clipka <ano### [at] anonymousorg> wrote:
> Am 09.12.2018 um 16:09 schrieb jr:
> > it's quite a bit slower than the previous x.tokenizer version (from 5576 to 6095
> > seconds for the first test), also shows a slight increase in "K tokens"
> > processed for same scene.
> The token count thing worries me a bit. I couldn't care less if I
> inadvertently introduced a slight change to the rules for how the number
> of tokens is counted as a side effect of some other sensible change, but
> I can't think of any recent change that might have such an effect; are
> you sure it's not simply an artifact of the way you observe this number?

there's more than one way to read it? :-)

> And are you sure we are talking about the same reference version
> (x-tokenizer.9945666)? If so, can you narrow down the scene language
> construct for which the values differ?

yes, and not really.  I used 9945627 as the "baseline", then ran the same scene
with 9945666 and 9960461.  all three were run "remote" on an otherwise idling
machine.  as for the language construct, I can not even guess, I have never
really looked at POV-Ray sources.  essentially, nested loops calling a macro
that uses inside() to trace, ie a scan of a volume.

curiously, the alpha reports the "no objects in scene" warning one line earlier
than the x.tokenizer versions.

> That said, the main focus of this version is on furthering my
> understanding of what's left of the legacy parser code. To that end,
> I've peppered the code with checks to verify some assumptions that may
> or may not hold true, and what I'm really interested in right now is
> reports of cases where they don't. Those should manifest as parse errors.

ah, I might not be much help here, I have no code requiring earlier than 3.6,
still, I'll keep using the latest x.tokenizer as the day-to-day version.


regards ,jr.


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