Cython Speedups
Installing Python extension
PyCharm's debugger is written in Python. Python is an interpreted language, which means that instructions have to be translated to machine code as the code is being run.
This costs time, and therefore it isn't as fast as the compiled code. Thankfully, Python supports compiled C-extensions through Cython. PyCharm ships with C versions of debugger code, which you can compile to make debugging in PyCharm faster.
If you have a large code base, using this speedup extension is reasonable.
The actions required to get additional speedups, depend on your platform:
- *NIX
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When the users start the debugger session, the notification pop-up window appears. The users just need to click the Install link there:
- macOS and Windows
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You don't need to do anything. We've bundled precompiled extensions, so you're already using them.
Troubleshooting
Reported Problem | Description | Solution |
|---|---|---|
Python.h: no such file or directory | You lack header files and static libraries for Python dev. | Use your package manager to install header files and static libraries for Python dev system-wide. For example, you can use the following commands:
|
Command 'gcc' failed with exit status 1 | You lack a C compiler. | Install a C compiler in order to build Cython extensions for the debugger |
Using Cython Speedups without PyCharm UI
If one wants to manually compile Cython speedups, he/she should not use the PyCharm UI.
On Ubuntu, use the following command:
/usr/bin/python3 /<PYCHARM_INSTALLATION_PATH>/helpers/pydev/setup_cython.py build_ext --inplaceNote that your paths should be adjusted to your particular local system.