Re: two suggestions to \typesetbuffer

[Pablo Rodriguez <oinos@gmx.es>]

On 11/08/2013 11:39 PM, Hans Hagen wrote:
> On 11/8/2013 7:11 PM, Pablo Rodriguez wrote:
>> Dear Hans,
>>
>> I have presentations that include buffers typeset with \typesetbuffer.
>>
>> One of the presentation includes 33 buffers, which are small ConTeXt
>> samples.
>>
>> Any time I change anything on the presentation (not on the buffers
>> themselves), every buffer is typeset again. And the compilation time is
>> longer than probably desired.
>>
>> My first suggestion would be to skip compiling buffers again, if the
>> following three requirements are met:
>>
>> 1. Buffer content (.tmp file, I guess) is identical (checked with a
>> hash) with the previous one from last compilation.
> 
> no temp file is used but a although a hash is possible it also means a 
> lot of extra housekeeping due to the fact that buffers are reused (in 
> which case no run happens)

Compiling the presentation I‘m talking about for the first time on my
laptop takes about 210 seconds. Every subsequent compilation takes about
70 seconds.

I know my laptop is old and slow.

But if I make a copy of the presentation source and remove the
\typesetbuffer commands, first compilation takes about 22 seconds and
subsequent compilations take about 7 seconds.

I have no idea on how ConTeXt works internally, but what I’m trying to
say is that if \typesetbuffer has been already compiled, compiling again
is no gain.

>> 3. Buffer content was correctly compiled in previous compilation.
> 
> define correctly

I meant completely compiled: PDF has been generated.

>> My second suggestion may be a bit complex to implement, but I think it
>> would be useful. Wouldn’t it be possible that the fonts are only
>> embedded one in the presentation?
> 
> how often does it happen ... if we're talking about one page files 
> processing should normally fast e.g.
> 
> \setupbodyfont[pagella] \starttext \input tufte \stoptext
> 
> takes .3 seconds on my laptop.
> 
> normally fonts are embedded efficiently (subsets) and shared

Sorry, there was a typo in my message: “that fonts are only embedded
once in the presentation”.

My second suggestion isn’t about compilation time, but about duplicated
fonts.

I tried to provide a sample, but I don’t know why it doesn’t work:

\starttext
These are bufers:

\dorecurse{10}{\startbuffer[text:\recurselevel]\setuppapersize[A7]\starttext\input
tufte\stoptext\stopbuffer\typesetbuffer[text:\recurselevel][frame=on]}
\stoptext

Of course, fonts are embedded fine in documents, but \typesetbuffer is a
special case. Having the fonts embedded only once in the final document
would be better.

Many thanks for your help,


Pablo
-- 
http://www.ousia.tk
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