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Re: Pixel-based display functions

From: Lars Ingebrigtsen
Subject: Re: Pixel-based display functions
Date: Sat, 07 Feb 2015 20:57:05 +1100
User-agent: Gnus/5.130012 (Ma Gnus v0.12) Emacs/25.0.50 (gnu/linux)

Eli Zaretskii <address@hidden> writes:

> It looks like your previous timings, viz.
>> shr-insert-document                  1           5.11859327    5.11859327
>> shr-pixel-buffer-width               1940        1.8345742170  0.0009456568
>> shr-fold-lines                       1579        1.7859513240  0.0011310648
>> shr-vertical-motion                  2625        1.7517520130  0.0006673341
> and
>> (benchmark-run 5000 (vertical-motion (cons (/ 700 (frame-char-width)) 0)))
>> => (0.942894006 2 0.05716983599999992)
> were better, at least as far as vertical-motion was concerned.  What
> happened that caused almost twofold degradation in speed of
> shr-vertical-motion?  And why does a single call to vertical-motion
> take ~0.2 msec, while a single call to shr-vertical-motion takes 1.7
> msec, more than 8 times more?

My guess would be the extra function call overhead, along with the ELP
instrumentation overhead.  ELP results are never all that precise, in my
opinion, but they're useful to give you a general overview of where time
is spent, since it adds about the same overhead to all functions.

>> http://en.wikipedia.org/wiki/Ocelot
>> The torture test part of the page isn't shown by default.  It's the bit
>> at the end that says "Extant Carnivora species [Show]".
> I don't see "Extant Carnivora species [Show]", I see "Extant Carnivora
> species" with "Carnivora" a link to
> http://en.wikipedia.org/wiki/Carnivora.  Is that what you meant?  (In
> what browser do you see what you described?  I tried eww and Forefox,
> and both show what I described.)

In my Firefox, it's shown as "Extant Carnivora species [Show]".  Do you
have Javascript switched on or something?  It's a JS table toggle or

> Anyway, which part of http://en.wikipedia.org/wiki/Carnivora is the
> torture part? the "Phylogenetic tree" part?

It's not that page, it on the Ocelot page.  In eww, it's the large table
that starts with "Extant Carnivora species" in the heading.

(domestic pets only, the antidote for overdose, milk.)
  bloggy blog http://lars.ingebrigtsen.no/

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