Re: Understanding filter function calls

[Karthik Chikmagalur]

> > > AFAICT, the data it outputs is completely useless in
> > > production use cases, and (with the possible exception of the last
> > > line, which shows the output file name) is basically debug-level info.
> > 
> > The filter function needs to read the output file name for the purposes
> > of updating LaTeX previews in the buffer.  The rest is superfluous to us
> > -- but it's possible that the sizing information is useful to other
> > applications.
>  
> Then maybe ask the dvisvgm developers to provide the level of
> verbosity that only shows the file name.  Emacs in general and Org in
> particular are important applications, and so it would be reasonable
> for the dvisvgm developers to cater to our needs, not only to the
> needs of other programs.

An update from the future: we asked the dvisvgm maintainer to provide a
customizable stdout message option and it was added in dvisvgm 3.2.
This has made the Emacs side of things great.  The filter function
is no longer the bottleneck, dvisvgm itself is.

Karthik