如何验证PyCharm中的Cython调试器已正常激活？

Hey there, let’s work through verifying your Cython debugger installation and fixing that brutal slowdown in debug mode. Here’s a step-by-step breakdown:

First: Verify if the Cython Debugger is Actually Installed & Active #

1. Check the Plugins Menu #

Open PyCharm and head to File > Settings > Plugins (Linux/Windows) or PyCharm > Preferences > Plugins (Mac). Type "Cython Debugger" into the search bar—if it shows up with a checkmark next to it, it’s enabled. If not, you’ll need to reinstall it via that popup link you used earlier.

2. Inspect Your Debug Configuration #

Go to your run/debug configs (click the dropdown next to the run button in the top-right, then select Edit Configurations). Find your Python debug setup and look for a section related to Cython debugging—you should see an option like "Enable Cython debugging" (the exact wording might vary slightly in 2018.1). If this option is missing, the plugin isn’t integrated properly.

3. Check the Plugin Installation Path #

You mentioned the path starts with /home/davidparks...—PyCharm’s plugin directory for 2018.1 on Linux is usually ~/.PyCharm2018.1/config/plugins/. Navigate there and look for a folder named something like cython-debugger. If it’s not present, the installation failed, and you’ll need to run the install again.

4. Test with a Minimal Cython Script #

The most definitive way to confirm the debugger works is to test it with a simple example:

1. Create a test.pyx file with:

   def add(int a, int b):
       return a + b
   

2. Make a setup.py to compile it with debug symbols:

   from setuptools import setup
   from Cython.Build import cythonize
   
   setup(
       ext_modules=cythonize("test.pyx", debug=True)
   )
   

3. Run python setup.py build_ext --inplace in your terminal to compile the module.
4. Write a small Python script that calls test.add(2,3), set a breakpoint inside the Cython function, and start debugging. If the breakpoint hits, the debugger is working. If not, something’s off with the installation.

Fixing the Debug Mode Slowdown #

A 30-minute debug session for a 30-second non-debug run is way out of line. Here are the most likely fixes:

• Ensure you’re compiling with debug symbols: The debug=True flag in cythonize is critical—without it, the debugger has to guess at code locations, which is extremely slow. Double-check your setup.py includes this.
• Trim unnecessary breakpoints: If you’ve got breakpoints in tight loops or frequently called functions, each pause adds up. Disable breakpoints you don’t need right now.
• Consider resource constraints: Debugging (especially Cython debugging) uses more CPU/memory. Close any other heavy apps running on your system to free up resources.
• Note your PyCharm version: 2018.1 is pretty old, and newer PyCharm versions have better Cython debugger performance and compatibility. If you can upgrade, it might solve the slowdown outright.

内容的提问来源于stack exchange，提问作者David Parks