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ci(perf): add the weekly baseline tightening workflow (#1760)
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@@ -321,61 +321,10 @@ jobs:
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- name: Install dependencies
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run: pnpm install --frozen-lockfile
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# The journeys drive Electron through Playwright's _electron API
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# and never launch a Playwright browser, so no `playwright
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# install`. The runner image ships Electron's shared libraries and
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# xvfb; fail fast with a clear message if an image update drops one.
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# pnpm skips Electron's postinstall, so download the binary first;
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# otherwise ldd sees no file and the check passes vacuously.
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- name: Check Electron runtime dependencies
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run: |
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command -v xvfb-run || { echo "::error::xvfb-run is missing on the runner"; exit 1; }
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node tools/testing/ensure-electron-binary.mjs || { echo "::error::Electron binary download failed"; exit 1; }
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missing="$(ldd node_modules/electron/dist/electron | grep 'not found' || true)"
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if [ -n "$missing" ]; then
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echo "::error::Electron is missing shared libraries:"
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echo "$missing"
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exit 1
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fi
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# The Nx target builds electron-backend:build-performance first
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# and playwright.journeys.config.ts starts the Xtream mock server.
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# Electron dependency check, the xvfb run, the summary lookup and
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# the job-summary report; shared with performance-ratchet.yml.
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- name: Run the performance journeys
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run: xvfb-run --auto-servernum --server-args="-screen 0 1280x960x24" pnpm run perf:journeys
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env:
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CI: true
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NX_TASKS_RUNNER_DYNAMIC_OUTPUT: false
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# Every run writes a fresh timestamped directory, so a clean
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# checkout must hold exactly one summary.
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- name: Locate the journey summary
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id: summary
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run: |
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set -euo pipefail
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mapfile -t summaries < <(find dist/performance/journeys -mindepth 2 -maxdepth 2 -name summary.json)
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if [ "${#summaries[@]}" -ne 1 ]; then
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echo "::error::Expected one journey summary, found ${#summaries[@]}"
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exit 1
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fi
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echo "path=${summaries[0]}" >> "$GITHUB_OUTPUT"
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- name: Report journey measurements
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env:
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SUMMARY: ${{ steps.summary.outputs.path }}
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run: |
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set -euo pipefail
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jq -r '
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"## Performance journeys (\(.harness.platform), \(.harness.measuredIterations) measured iterations)", "",
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(.journeys | to_entries[] | .key as $journey | .value as $j |
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"### `\($journey)`", "",
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"| Measurement | Value | Iterations |",
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"| --- | ---: | --- |",
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(($j.counters // {}) | to_entries[] |
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($j.counterStability[.key] // {}) as $s |
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"| `\(.key)` | \(.value) | \(($s.values // []) | map(tostring) | join(", "))\(if $s.stable == false then " (unstable)" else "" end) |"),
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(($j.wallClock // {}) | to_entries[] | "| `\(.key)` | \(.value) | |"),
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"")
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' "$SUMMARY" | tee -a "$GITHUB_STEP_SUMMARY"
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uses: ./.github/actions/performance-journeys
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- name: Upload journey summaries
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if: always()
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@@ -0,0 +1,246 @@
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name: Performance ratchet
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# Weekly tightening of tools/performance/journey-baselines.json (plan item B4;
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# contract in the Ratchet section of docs/architecture/performance-journeys.md).
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# Three runners measure the same master commit independently; a pull request
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# lowers every baseline that all three beat. Nothing is ever raised, and slack
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# and tolerances are left alone. A manual dispatch on another branch measures
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# and reports but never opens a pull request.
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on:
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schedule:
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- cron: '41 4 * * 1'
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workflow_dispatch:
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permissions:
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contents: read
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concurrency:
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group: performance-ratchet-${{ github.ref }}
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cancel-in-progress: false
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jobs:
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measure:
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name: Measure (run ${{ matrix.run }})
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if: github.repository == '4gray/iptvnator'
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runs-on: ubuntu-latest
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# Production web build plus the journeys (their electron-performance
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# build and seven Electron processes per journey).
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timeout-minutes: 60
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strategy:
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# Separate runners, so one machine's noise cannot pass for a
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# reduction. The tightener needs all three runs.
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fail-fast: true
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matrix:
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run: [1, 2, 3]
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env:
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NX_SKIP_NX_CACHE: true
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steps:
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- name: Checkout code
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uses: actions/checkout@v7
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with:
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persist-credentials: false
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- name: Install pnpm
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uses: pnpm/action-setup@v6.0.10
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- name: Setup Node.js
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uses: actions/setup-node@v7
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with:
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node-version-file: '.nvmrc'
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cache: 'pnpm'
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- name: Install dependencies
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run: pnpm install --frozen-lockfile
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# Same build as the Initial bytes ratchet job in ci.yml. Measured
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# before the journeys, whose build also writes to dist/.
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- name: Build web app (production)
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run: pnpm nx build web --skip-nx-cache
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env:
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CI: true
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NX_TASKS_RUNNER_DYNAMIC_OUTPUT: false
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- name: Measure renderer.initialBytes
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run: node tools/performance/measure-initial-bytes.mjs --summary dist/performance/ratchet/initial-bytes.summary.json
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# A failed journey run must not block tightening the initial bytes:
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# its entries are then missing from this run's summary, and the
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# tightener keeps any baseline that a run did not measure.
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- name: Run the performance journeys
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id: journeys
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continue-on-error: true
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uses: ./.github/actions/performance-journeys
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- name: Keep the journey summary
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if: steps.journeys.outputs.summary != ''
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env:
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SUMMARY: ${{ steps.journeys.outputs.summary }}
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run: cp "$SUMMARY" dist/performance/ratchet/journeys.summary.json
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- name: Upload run summaries
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uses: actions/upload-artifact@v7
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with:
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name: performance-ratchet-run-${{ matrix.run }}
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path: dist/performance/ratchet/
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if-no-files-found: error
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retention-days: 30
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tighten:
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name: Tighten baselines
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needs: measure
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runs-on: ubuntu-latest
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timeout-minutes: 15
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steps:
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# This job later receives secrets.PAT, so its actions are pinned
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# to reviewed commits, as in refresh-windows-embedded-mpv-runtime.
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- name: Checkout code
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uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
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with:
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persist-credentials: false
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# The ratchet scripts are dependency-free Node; no pnpm install.
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- name: Setup Node.js
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uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
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with:
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node-version-file: '.nvmrc'
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- name: Download run summaries
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uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
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with:
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pattern: performance-ratchet-run-*
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path: ${{ runner.temp }}/runs
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# Each run directory holds that runner's initial-bytes and journeys
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# summaries. The direction check is the same one ci.yml runs on the
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# PR, without --allow-increase: a tightening can only lower limits.
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- name: Lower baselines every run beat
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id: tighten
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env:
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RUNS_DIR: ${{ runner.temp }}/runs
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REPORT: ${{ runner.temp }}/tighten-report.md
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BASE_BASELINES: ${{ runner.temp }}/base-journey-baselines.json
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RUN_URL: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}
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run: |
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set -euo pipefail
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baselines=tools/performance/journey-baselines.json
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cp "$baselines" "$BASE_BASELINES"
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runs=()
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for dir in "$RUNS_DIR"/performance-ratchet-run-*; do
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runs+=(--run "$dir")
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done
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node tools/performance/tighten-baselines.mjs \
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"${runs[@]}" \
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--evidence-run "$RUN_URL" \
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--report "$REPORT"
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{
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echo "## Performance ratchet"
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echo
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cat "$REPORT"
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} >> "$GITHUB_STEP_SUMMARY"
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node tools/performance/check-baseline-direction.mjs \
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--base "$BASE_BASELINES" \
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--head "$baselines"
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if git diff --quiet -- "$baselines"; then
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echo "changed=false" >> "$GITHUB_OUTPUT"
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else
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git diff -- "$baselines"
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echo "changed=true" >> "$GITHUB_OUTPUT"
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fi
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- name: Report a dispatch outside master
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if: steps.tighten.outputs.changed == 'true' && github.ref != 'refs/heads/master'
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env:
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REF_NAME: ${{ github.ref_name }}
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run: echo "Dispatched on $REF_NAME, not master; the diff above is not proposed as a pull request."
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# PAT, not GITHUB_TOKEN: a pull request pushed with GITHUB_TOKEN
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# triggers no workflows, and this one needs ci.yml's Initial bytes
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# ratchet run. Same secret as refresh-windows-embedded-mpv-runtime.
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# The PR number is only known once the PR exists, so evidencePr is
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# filled in afterwards and the single commit amended. Each run
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# replaces the branch with one fresh commit, but never over an open
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# tightening PR that someone else committed to (review edits, an
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# "Update branch" merge); explicit leases also refuse a push that
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# lands between that check and ours.
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- name: Create or update the tightening pull request
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if: steps.tighten.outputs.changed == 'true' && github.ref == 'refs/heads/master'
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env:
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GH_TOKEN: ${{ secrets.PAT }}
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REPOSITORY: ${{ github.repository }}
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BRANCH_NAME: automation/performance-ratchet
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TITLE: 'ci(perf): tighten journey baselines'
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LABEL: no-release-note
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REPORT: ${{ runner.temp }}/tighten-report.md
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BODY: ${{ runner.temp }}/pr-body.md
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HEAD_SHA: ${{ github.sha }}
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RUN_URL: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}
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run: |
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set -euo pipefail
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if [ -z "${GH_TOKEN}" ]; then
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echo "::error::The PAT secret is required so the bot-created PR triggers normal CI."
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exit 1
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fi
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baselines=tools/performance/journey-baselines.json
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bot_email="41898282+github-actions[bot]@users.noreply.github.com"
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gh auth setup-git
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git config user.name "github-actions[bot]"
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git config user.email "$bot_email"
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pr="$(gh api "repos/$REPOSITORY/pulls?base=master&head=${REPOSITORY%%/*}:$BRANCH_NAME&state=open" --jq '.[0].number // empty')"
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remote_tip="$(git ls-remote --heads origin "refs/heads/$BRANCH_NAME" | cut -f1)"
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if [ -n "$pr" ] && [ -n "$remote_tip" ]; then
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foreign="$(gh api "repos/$REPOSITORY/compare/master...$remote_tip" |
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jq -r --arg bot "$bot_email" '.commits[] | select(.commit.author.email != $bot) | "\(.sha[0:9]) \(.commit.author.name)"')"
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if [ -n "$foreign" ]; then
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echo "::warning::Pull request #$pr has commits this workflow did not make; its branch is left as is. Merge or close it so the next run can refresh it. This run's numbers are in the job summary."
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echo "$foreign"
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exit 0
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fi
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fi
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if [ -n "$remote_tip" ]; then
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git fetch --no-tags --depth=1 origin "$remote_tip"
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fi
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git switch -C "$BRANCH_NAME"
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git add -- "$baselines"
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git commit -m "$TITLE" -m "Measured by $RUN_URL"
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git push --force-with-lease="refs/heads/$BRANCH_NAME:$remote_tip" origin "HEAD:refs/heads/$BRANCH_NAME"
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pushed="$(git rev-parse HEAD)"
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if [ -z "$pr" ]; then
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pr="$(gh api -X POST "repos/$REPOSITORY/pulls" \
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-f title="$TITLE" -f head="$BRANCH_NAME" -f base=master \
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-f body="Measurements follow." --jq '.number')"
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fi
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gh api -X POST "repos/$REPOSITORY/issues/$pr/labels" -f "labels[]=$LABEL" --silent
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node tools/performance/tighten-baselines.mjs \
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--fill-evidence-pr "$pr" --evidence-run "$RUN_URL"
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git add -- "$baselines"
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git commit --amend --no-edit
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git push --force-with-lease="refs/heads/$BRANCH_NAME:$pushed" origin "HEAD:refs/heads/$BRANCH_NAME"
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{
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echo "Automated weekly tightening of \`$baselines\` from [three runner measurements]($RUN_URL) of \`$HEAD_SHA\`."
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echo
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echo "Each lowered baseline was strictly below its value in all three runs and now holds the largest of the three. Slack and tolerances are unchanged; \`check-baseline-direction.mjs\` accepted the file without \`--allow-increase\`."
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echo
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echo "## Per-run measurements"
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echo
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cat "$REPORT"
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echo
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echo "## Diff"
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echo
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echo '```diff'
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git diff "$HEAD_SHA" HEAD -- "$baselines"
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echo '```'
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echo
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echo "If \`master\` moved since \`$HEAD_SHA\`, make sure the Initial bytes ratchet job passes on this PR before merging."
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} > "$BODY"
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gh api -X PATCH "repos/$REPOSITORY/pulls/$pr" -F "body=@$BODY" --silent
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echo "Pull request: ${GITHUB_SERVER_URL}/$REPOSITORY/pull/$pr"
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