Create benchmark_pr.yml (#141)

* Create benchmark_pr.yml

Benchmark workflow for Pull Request

* Update benchmark_pr.yml

* Update benchmark_pr.yml

* Update benchmark_pr.yml

.github/workflows/benchmark_pr.yml

@@ -0,0 +1,67 @@
+name: Benchmark
+on:
+  #push:
+  #  branches: [ master ]
+  pull_request:
+    branches: [ master ]
+env:
+  # Customize the CMake build type here (Release, Debug, RelWithDebInfo, etc.)
+  BUILD_TYPE: Release
+
+jobs:
+  benchmark:
+    name: Performance regression check
+    runs-on: ubuntu-latest
+    steps:
+      - name: Install gtest manually
+        run: sudo apt-get install libgtest-dev
+
+      - name: Install benchmark manually
+        run: |
+          git clone https://github.com/google/benchmark.git
+          git clone https://github.com/google/googletest.git benchmark/googletest
+          cd benchmark
+          cmake -E make_directory "build"
+          cmake -E chdir "build" cmake -DCMAKE_BUILD_TYPE=Release ../
+          cmake --build "build" --config Release
+          sudo cmake --build "build" --config Release --target install
+      - uses: actions/checkout@v2
+
+      - name: Configure CMake
+      # Configure CMake in a 'build' subdirectory. `CMAKE_BUILD_TYPE` is only required if you are using a single-configuration generator such as make.
+      # See https://cmake.org/cmake/help/latest/variable/CMAKE_BUILD_TYPE.html?highlight=cmake_build_type
+        run: cmake -B ${{github.workspace}}/build -DCMAKE_BUILD_TYPE=${{env.BUILD_TYPE}} -DBENCHMARK=ON
+
+      - name: Build
+      # Build your program with the given configuration
+        run: cmake --build ${{github.workspace}}/build --config ${{env.BUILD_TYPE}}
+      - name: Download previous benchmark data
+        uses: actions/cache@v1
+        with:
+          path: ./cache
+          key: ${{ runner.os }}-benchmark
+
+      - name: Benchmarking
+        working-directory: ${{github.workspace}}/build
+        run: ./benchmark --benchmark_format=json | tee benchmark_result.json
+        # Run `github-action-benchmark` action
+      - name: Store benchmark result
+        uses: rhysd/github-action-benchmark@v1
+        with:
+            # What benchmark tool the output.txt came from
+            tool: 'googlecpp'
+            # Where the output from the benchmark tool is stored
+            output-file-path: ${{github.workspace}}/build/benchmark_result.json
+            # Where the previous data file is stored
+            #external-data-json-path: ./cache/benchmark-data.json
+            # Workflow will fail when an alert happens
+            fail-on-alert: false
+            # Upload the updated cache file for the next job by actions/cache
+            # Personal access token to deploy GitHub Pages branch
+            github-token: ${{ secrets.PERSONAL_TOKEN }}
+            # Push and deploy GitHub pages branch automatically
+            #auto-push: true
+            # Enable alert commit comment
+            comment-on-alert: true
+            # Mention @rhysd in the commit comment
+            alert-comment-cc-users: '@ZigRazor'