adding benchmark execution time github action

.github/workflows/benchmark_execution_time.yml

@@ -0,0 +1,138 @@
+name: Benchmark execution time comparison with the main branch
+
+on:
+  pull_request:
+    branches: [main]
+
+jobs:
+  building-pr-branch:
+    if: contains( github.event.pull_request.labels.*.name, 'benchmark-exec-time' )
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout to PR branch
+      uses: actions/checkout@v2
+
+    - name: Setup Linux env
+      run: |
+        sudo apt -y update
+        sudo apt install libsystemd-dev librust-libdbus-sys-dev libseccomp-dev
+
+    - name: Setting rust toolchain
+      uses: actions-rs/toolchain@v1
+      with:
+        toolchain: stable
+        override: true
+        profile: minimal
+
+    - name: Building PR branch
+      run: ./build.sh --release
+
+    - name: Uploading PR build to artifact
+      uses: actions/upload-artifact@v2
+      with:
+        name: pr-youki
+        path: ./youki
+
+  building-main-branch:
+    if: contains( github.event.pull_request.labels.*.name, 'benchmark-exec-time' )
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout to main branch
+      uses: actions/checkout@v2
+      with:
+        ref: main
+
+    - name: Setup Linux env
+      run: |
+        sudo apt -y update
+        sudo apt install libsystemd-dev librust-libdbus-sys-dev libseccomp-dev
+
+    - name: Setting rust toolchain
+      uses: actions-rs/toolchain@v1
+      with:
+        toolchain: stable
+        override: true
+        profile: minimal
+
+    - name: Building main branch
+      run: ./build.sh --release
+
+    - name: Uploading main build to artifact
+      uses: actions/upload-artifact@v2
+      with:
+        name: main-youki
+        path: ./youki
+
+  benchmark-exec:
+    if: contains( github.event.pull_request.labels.*.name, 'benchmark-exec-time' )
+    needs:
+      - building-pr-branch
+      - building-main-branch
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Setup Linux env
+      run: |
+        sudo apt -y update
+        sudo apt install jq podman
+
+    - name: Checkout to PR branch
+      uses: actions/checkout@v2
+
+    - name: Downloading PR build from artifact
+      uses: actions/download-artifact@v2
+      with:
+        name: pr-youki
+        path: ./pr_youki
+
+    - name: Downloading main build from artifact
+      uses: actions/download-artifact@v2
+      with:
+        name: main-youki
+        path: ./main_youki
+
+    - name: Preparing binaries
+      run: |
+        mv ./main_youki/youki ./youki_main
+        mv ./pr_youki/youki ./youki_pr
+        chmod +x ./youki_main
+        chmod +x ./youki_pr
+
+    - name: Preparing benchmark bundle
+      run: |
+        mkdir -p ./benchmark_exec_bundle/rootfs
+        cd benchmark_exec_bundle
+        sudo bash -c 'podman export $(podman create busybox) | tar -C rootfs -xvf -'
+        ../youki_main spec 
+        sed -i 's/"sh"/"sh", "-c", "echo Hi, my PID is $$; echo Bye Bye"/' config.json
+        sed -i 's/"terminal": true/"terminal": false/' config.json
+          
+    - name: Installing hyperfine
+      run: |
+        curl -s https://api.github.com/repos/sharkdp/hyperfine/releases/latest \
+        | jq -r '.assets[] | select(.name? | match("hyperfine-musl_.*_amd64.deb")) | .browser_download_url' \
+        | wget -qi -
+        sudo dpkg -i *.deb
+
+    - name: Running benchmark
+      run: |
+        hyperfine --prepare 'sudo sync; echo 3 | sudo tee /proc/sys/vm/drop_caches' \
+        --export-markdown bench_exec_result.md \
+        --warmup 10 \
+        --min-runs 100 \
+        --command-name 'main youki build' \
+        'sudo ./youki_main run -b benchmark_exec_bundle main_container && sudo ./youki_main delete -f main_container' \
+        --command-name 'pr youki build' \
+        'sudo ./youki_pr run -b benchmark_exec_bundle pr_container && sudo ./youki_pr delete -f pr_container'
+
+    - name: Adding info into result
+      run: |
+        sed -i '1i > commit (${{ github.sha }})\n' bench_exec_result.md
+
+    - name: Writting report to PR comment
+      uses: marocchino/sticky-pull-request-comment@v2 
+      with:
+        append: true
+        path: ./bench_exec_result.md