install no-gil python from miniconda

and run with GIL disabled

.github/workflows/test.yml

@@ -9,21 +9,53 @@ jobs:
   build:
     strategy:
       matrix:
-        version: ["3.9", "3.10", "3.11", "3.12"]
+        version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
     runs-on: ubuntu-latest
+    defaults:
+      run:
+        shell: bash -el {0}
     steps:
     - uses: actions/checkout@v3
+
     - name: Set up Python
+      if: matrix.version != 3.13
       uses: actions/setup-python@v4
       with:
         python-version: "${{ matrix.version }}"
         allow-prereleases: true
 
+    - name: Setup Python via Miniconda
+      if: matrix.version == 3.13
+      uses: conda-incubator/[email protected]
+      with:
+        python-version: 3.13
+        channels: defaults,ad-testing/label/py313_nogil
+
+    - name: Check Python version
+      run: |
+        python -VV
+
+    - name: Check Python GIL enabled
+      if: matrix.version == 3.13
+      run: python -c "import sys; print(sys._is_gil_enabled())"
+
     - name: Install dependencies
       run: |
         pip install setuptools
-    - name: Build and run tests
+
+    - name: Build C extension
       run: |
         python python_c_extension/setup.py build
         cp -r build/*/* python_c_extension
-        python -m unittest discover tests/ -vvv
+
+    - name: Run script in single and multi-thread mode
+      run: |
+        python python_c_extension/c_extension_gil.py
+      env:
+        PYTHONPATH: "."
+        PYTHON_GIL: 0
+
+    - name: Run Tests
+      run: python -m unittest discover tests/ -vvv
+      env:
+        PYTHON_GIL: 0

python_c_extension/c_extension_gil.py

@@ -13,24 +13,31 @@
 
 N = int(10e8)
 
+def count_pure_python(n):
+    while n > 0:
+        n -= 1
 
-def run_count_in_single_thread():
+
+def run_count_in_single_thread(count_func=count):
     t1 = time()
-    count(N)
+    count_func(N)
     time_taken = time() - t1
     return time_taken
 
 
-def run_count_in_multiple_threads():
+def run_count_in_multiple_threads(count_func=count):
     t1 = time()
-    th1 = Thread(target=count, args=(N // 2,))
-    th2 = Thread(target=count, args=(N // 2,))
+    th1 = Thread(target=count_func, args=(N // 2,))
+    th2 = Thread(target=count_func, args=(N // 2,))
     th1.start(); th2.start()
     th1.join(); th2.join()
     time_taken = time() - t1
     return time_taken
 
 
 if __name__ == '__main__':
-    print('Single Thread: %8f' % (run_count_in_single_thread()))
-    print('Two Threads:   %8f' % (run_count_in_multiple_threads()))
+    print('Single Thread (C extension): %8f' % (run_count_in_single_thread(count)))
+    print('Two Threads (C extension):   %8f' % (run_count_in_multiple_threads(count)))
+
+    print('Single Thread (Pure Python): %8f' % (run_count_in_single_thread(count_pure_python)))
+    print('Two Threads (Pure Python):   %8f' % (run_count_in_multiple_threads(count_pure_python)))