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Dvi caching #10268

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645c8da
Cache kpsewhich results persistently
jkseppan Jan 12, 2018
2124ac8
Include next_whats_new/* again
jkseppan Feb 16, 2018
3ce3061
Enable some sqlite and pysqlite options
jkseppan Feb 18, 2018
ba47418
Call kpsewhich with more arguments at one time
jkseppan Jan 12, 2018
940925d
Small improvements to the Vf class
jkseppan Jan 19, 2018
545b407
Add a way to represent dvi files in the cache
jkseppan Jan 19, 2018
2418413
Implement reading dvi files into the cache
jkseppan Jan 19, 2018
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8 changes: 8 additions & 0 deletions doc/api/next_api_changes/2018-02-16-JKS.rst
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dviread changes
---------------

The ``format`` keyword argument to ``dviread.find_tex_file`` has been
deprecated. The function without the ``format`` argument, as well as
the new ``dviread.find_tex_files`` function, cache their results in
``texsupport.N.db`` in the cache directory to speed up dvi file
processing.
22 changes: 22 additions & 0 deletions doc/users/next_whats_new/texsupport_cache.rst
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TeX support cache
-----------------

The `usetex` feature sends snippets of TeX code to LaTeX and related
external tools for processing. This causes a nontrivial number of
helper processes to be spawned, which can be slow on some platforms.
A new cache database helps reduce the need to spawn these helper
processes, which should improve `usetex` processing speed.

The new cache files
~~~~~~~~~~~~~~~~~~~

The cache database is stored in a file named `texsupport.N.db` in the
standard cache directory (traditionally `$HOME/.matplotlib` but
possibly `$HOME/.cache/matplotlib`), where `N` stands for a version
number. The version number is incremented when new kinds of items are
added to the caching code, in order to avoid version clashes when
using multiple different versions of Matplotlib. The auxiliary files
`texsupport.N.db-wal` and `texsupport.N.db-shm` help coordinate usage
of the cache between concurrently running instances. All of these
cache files may be deleted when Matplotlib is not running, and
subsequent calls to the `usetex` code will recompute the TeX results.
10 changes: 5 additions & 5 deletions doc/users/whats_new.rst
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Expand Up @@ -14,12 +14,12 @@ revision, see the :ref:`github-stats`.
..
For a release, add a new section after this, then comment out the include
and toctree below by indenting them. Uncomment them after the release.
.. include:: next_whats_new/README.rst
.. toctree::
:glob:
:maxdepth: 1
.. include:: next_whats_new/README.rst
.. toctree::
:glob:
:maxdepth: 1

next_whats_new/*
next_whats_new/*


New in Matplotlib 2.2
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