ci: optimize workflows with ccache and parallel builds

- Add ccache action and CMake launcher options to cpp-ci workflow
- Enable parallel CMake builds (--parallel) for C++ CI
- Add pip caching to Python setup actions
- Set CMAKE_BUILD_PARALLEL_LEVEL=4 for cibuildwheel builds

Author: Neiko2002

.github/workflows/BuildAndPublish.yml

@@ -28,6 +28,7 @@ jobs:
     - uses: actions/setup-python@v5
       with:
         python-version: "3.12"
+        cache: 'pip'
 
     - name: Add requirements
       run: python -m pip install --upgrade setuptools pybind11>=2.12.0 cibuildwheel
@@ -40,8 +41,8 @@ jobs:
       env:
         CIBW_ARCHS: auto64
         CIBW_BUILD_FRONTEND: "pip; args: --verbose"
-        CIBW_ENVIRONMENT: "FORCE_AVX2=1"
-        CIBW_ENVIRONMENT_MACOS: "FORCE_AVX2=1 MACOSX_DEPLOYMENT_TARGET=11.00"
+        CIBW_ENVIRONMENT: "FORCE_AVX2=1 CMAKE_BUILD_PARALLEL_LEVEL=4"
+        CIBW_ENVIRONMENT_MACOS: "FORCE_AVX2=1 MACOSX_DEPLOYMENT_TARGET=11.00 CMAKE_BUILD_PARALLEL_LEVEL=4"
         CIBW_SKIP: "cp314-* cp314t-* pp*win*"
 
     # upload artifacts

.github/workflows/BuildAndTest.yml

@@ -24,6 +24,7 @@ jobs:
     - uses: actions/setup-python@v5
       with:
         python-version: "3.12"
+        cache: 'pip'
 
     - name: Add requirements
       run: python -m pip install --upgrade setuptools pybind11>=2.12.0 cibuildwheel
@@ -36,8 +37,8 @@ jobs:
       env:
         CIBW_ARCHS: auto64
         CIBW_BUILD_FRONTEND: "pip; args: --verbose"
-        CIBW_ENVIRONMENT: "FORCE_AVX2=1"
-        CIBW_ENVIRONMENT_MACOS: "FORCE_AVX2=1 MACOSX_DEPLOYMENT_TARGET=11.00"
+        CIBW_ENVIRONMENT: "FORCE_AVX2=1 CMAKE_BUILD_PARALLEL_LEVEL=4"
+        CIBW_ENVIRONMENT_MACOS: "FORCE_AVX2=1 MACOSX_DEPLOYMENT_TARGET=11.00 CMAKE_BUILD_PARALLEL_LEVEL=4"
         CIBW_SKIP: "cp314t-* cp314-* pp*win*"
 
   build_sdist:

.github/workflows/cpp-ci.yml

@@ -21,11 +21,17 @@ jobs:
       with:
         submodules: recursive
 
+    - name: Setup ccache
+      uses: hendrikmuhs/ccache-action@v1.2
+      with:
+        key: ${{ matrix.os }}-ccache-${{ github.sha }}
+        restore-keys: ${{ matrix.os }}-ccache-
+
     - name: Configure CMake
-      run: cmake -B build -S cpp -DFORCE_AVX2=ON -DENABLE_BENCHMARKS=OFF
+      run: cmake -B build -S cpp -DFORCE_AVX2=ON -DENABLE_BENCHMARKS=OFF -DCMAKE_C_COMPILER_LAUNCHER=ccache -DCMAKE_CXX_COMPILER_LAUNCHER=ccache
 
     - name: Build
-      run: cmake --build build --config Release
+      run: cmake --build build --config Release --parallel
 
     - name: Run Tests
       run: ctest --test-dir build --output-on-failure -C Release

cpp/CMakeLists.txt

@@ -15,6 +15,7 @@ project(
 
 # build options
 option(ENABLE_BENCHMARKS "compile benchmarks" ON)
+option(ENABLE_TESTING "compile tests" ON)
 option(FORCE_AVX2 "compile for avx2 support. Otherwise compile for this machine." OFF)
 
 # https://cmake.org/cmake/help/latest/prop_tgt/CXX_STANDARD.html
@@ -96,7 +97,9 @@ message("C++ compiler flags release: ${CMAKE_CXX_FLAGS_RELEASE}")
 
 enable_testing()
 add_subdirectory(deglib)
-add_subdirectory(test)
+if (ENABLE_TESTING)
+	add_subdirectory(test)
+endif()
 
 if (ENABLE_BENCHMARKS)
 	add_subdirectory(external/fmt)