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.. include:: header.rst
.. _RecipesMultiprocessing:
.. |toggleStart| raw:: html
<details>
<summary><a>See code</a></summary>
.. |toggleEnd| raw:: html
</details>
==============================
Multiprocessing
==============================
|PyMuPDF| does not support running on multiple threads - doing so may cause incorrect behaviour or even crash Python itself.
However, there is the option to use :title:`Python's` *multiprocessing* module in a variety of ways.
If you are looking to speed up page-oriented processing for a large document, use this script as a starting point. It should be at least twice as fast as the corresponding sequential processing.
|toggleStart|
.. literalinclude:: samples/multiprocess-render.py
:language: python
|toggleEnd|
Here is a more complex example involving inter-process communication between a main process (showing a GUI) and a child process doing |PyMuPDF| access to a document.
|toggleStart|
.. literalinclude:: samples/multiprocess-gui.py
:language: python
|toggleEnd|
.. include:: footer.rst
|
