Re: long lines and slowness (common when viewing style sheets)

"Sebastian Geerken" <[email protected]> 26 May 2015 21:50:48 +0200

Newsgroups	gmane.comp.web.dillo.devel
Message-ID	<[email protected]>

On Di, Mai 26, 2015, eocene wrote:
> 
> Now that everyone likes to send their style sheets as one big long line,
> like 250k long, viewing them in dillo is slow.
> 
> gprof says
>   %   cumulative   self              self     total           
>  time   seconds   seconds    calls   s/call   s/call  name    
>  32.47      1.88     1.88 189407242     0.00     0.00  lout::misc::NotSoSimpleVector<dw::Textblock::Word>::getRef(int) const
>  29.36      3.58     1.70 187437456     0.00     0.00  dw::Textblock::BadnessAndPenalty::lineCanBeBroken(int)
>  28.15      5.21     1.63    29345     0.00     0.00  dw::Textblock::wrapWordInFlow(int, bool)
> 
> and I wonder whether any optimizations are possible.

Yes, I know this bug (you sent it me some time ago), and it is on my
todo list.

Since this occured first with hyphenation (or rather per-line
optimization), there is certainly a way to optimize it. A vague guess
is that it has to do with the iteration over the line to find the best
break point.

(BTW: the functionality used for plain text could also be provided by
a new widget which is much simpler than Textblock.)

Sebastian

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