Benchmark Generators #1
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| name: Benchmark Generator | |
| on: | |
| workflow_dispatch: | |
| permissions: | |
| contents: read | |
| actions: write | |
| jobs: | |
| benchmark: | |
| strategy: | |
| matrix: | |
| os: [ubuntu-latest, windows-latest, macos-latest] | |
| runs-on: ${{ matrix.os }} | |
| steps: | |
| - uses: actions/checkout@v6 | |
| - uses: actions/setup-java@v5 | |
| with: | |
| distribution: 'temurin' | |
| java-version: '25' | |
| - uses: jbangdev/setup-jbang@main | |
| - name: Setup Python | |
| uses: actions/setup-python@v5 | |
| with: | |
| python-version: '3.13' | |
| - name: Build fat JAR | |
| run: jbang export fatjar --force --output html-generators/generate.jar html-generators/generate.java | |
| - name: Build AOT cache | |
| run: java -XX:AOTCacheOutput=html-generators/generate.aot -jar html-generators/generate.jar | |
| - name: Run benchmark | |
| shell: bash | |
| run: | | |
| JAR="html-generators/generate.jar" | |
| AOT="html-generators/generate.aot" | |
| RUNS=6 | |
| snippet_count=$(find content -name '*.json' | wc -l | tr -d ' ') | |
| java_ver=$(java -version 2>&1 | head -1 | sed 's/.*"\(.*\)".*/\1/') | |
| os_name="${{ matrix.os }}" | |
| # Timing helper using bash TIMEFORMAT | |
| measure() { | |
| TIMEFORMAT='%R' | |
| local t | |
| t=$( { time "$@" > /dev/null 2>&1; } 2>&1 ) | |
| echo "$t" | |
| } | |
| bench() { | |
| local label="$1"; shift | |
| local times=() | |
| for ((i = 1; i <= RUNS; i++)); do | |
| t=$(measure "$@") | |
| times+=("$t") | |
| done | |
| local cold="${times[0]}" | |
| local sum=0 | |
| for ((i = 1; i < RUNS; i++)); do | |
| sum=$(awk "BEGIN {print $sum + ${times[$i]}}") | |
| done | |
| local warm | |
| warm=$(awk "BEGIN {printf \"%.2f\", $sum / ($RUNS - 1)}") | |
| echo "${label}|${cold}|${warm}" | |
| } | |
| echo "Running benchmark on $os_name (Java $java_ver, $snippet_count snippets)..." | |
| aot_result=$(bench "Fat JAR + AOT" java -XX:AOTCache="$AOT" -jar "$JAR") | |
| jar_result=$(bench "Fat JAR" java -jar "$JAR") | |
| jbang_result=$(bench "JBang" jbang html-generators/generate.java) | |
| python_result=$(bench "Python" python3 html-generators/generate.py) | |
| # Write to GitHub Actions Job Summary | |
| { | |
| echo "## Benchmark Results — \`$os_name\`" | |
| echo "" | |
| echo "Java $java_ver · $snippet_count snippets · $RUNS runs (1 cold + $((RUNS - 1)) warm)" | |
| echo "" | |
| echo "| Method | Cold Start | Warm Average |" | |
| echo "|--------|-----------|-------------|" | |
| for result in "$aot_result" "$jar_result" "$jbang_result" "$python_result"; do | |
| IFS='|' read -r label cold warm <<< "$result" | |
| echo "| **$label** | ${cold}s | ${warm}s |" | |
| done | |
| } >> "$GITHUB_STEP_SUMMARY" |