Files
ComfyUI_frontend/.github/workflows/pr-report.yaml
Christian Byrne 437f41c553 perf: add layout/GC metrics + reduce false positives in regression detection (#10477)
## Summary

Add layout duration, style recalc duration, and heap usage metrics to CI
perf reports, while improving statistical reliability to reduce false
positive regressions.

## Changes

- **What**:
- Collect `layoutDurationMs`, `styleRecalcDurationMs`, `heapUsedBytes`
(absolute snapshot) alongside existing metrics
- Add effect size gate (`minAbsDelta`) for integer-quantized count
metrics (style recalcs, layouts, DOM nodes, event listeners) — prevents
z=7.2 false positives from e.g. 11→12 style recalcs
- Switch from mean to **median** for PR metric aggregation — robust to
outlier CI runs that dominate n=3 mean
- Increase historical baseline window from **5 to 15 runs** for more
stable σ estimates
- Reorder reported metrics: layout/style duration first (actionable),
counts and heap after (informational)

## Review Focus

The effect size gate in `classifyChange()` — it now requires both z > 2
AND absolute delta ≥ `minAbsDelta` (when configured) to flag a
regression. This addresses the core false positive issue where integer
metrics with near-zero historical variance produce extreme z-scores for
trivial changes.

Median vs mean tradeoff: median is more robust to outliers but less
sensitive to real shifts — acceptable given n=3 and CI noise levels.

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-10477-perf-add-layout-GC-metrics-reduce-false-positives-in-regression-detection-32d6d73d365081daa72cec96d8a07b90)
by [Unito](https://www.unito.io)
2026-03-25 10:16:56 -07:00

234 lines
8.2 KiB
YAML

name: 'PR: Unified Report'
on:
workflow_run:
workflows: ['CI: Size Data', 'CI: Performance Report']
types:
- completed
permissions:
contents: read
pull-requests: write
issues: write
actions: read
concurrency:
group: pr-report-${{ github.event.workflow_run.head_sha }}
cancel-in-progress: true
jobs:
comment:
runs-on: ubuntu-latest
if: >
github.repository == 'Comfy-Org/ComfyUI_frontend' &&
github.event.workflow_run.event == 'pull_request'
steps:
- uses: actions/checkout@v6
- name: Setup frontend
uses: ./.github/actions/setup-frontend
- name: Resolve PR from workflow_run context
id: pr-meta
uses: actions/github-script@v8
with:
script: |
let pr = context.payload.workflow_run.pull_requests?.[0];
if (!pr) {
const { data: prs } = await github.rest.repos.listPullRequestsAssociatedWithCommit({
owner: context.repo.owner,
repo: context.repo.repo,
commit_sha: context.payload.workflow_run.head_sha,
});
pr = prs.find(p => p.state === 'open');
}
if (!pr) {
core.info('No open PR found for this workflow run — skipping.');
core.setOutput('skip', 'true');
return;
}
// Verify the workflow_run head SHA matches the current PR head
const { data: livePr } = await github.rest.pulls.get({
owner: context.repo.owner,
repo: context.repo.repo,
pull_number: pr.number,
});
if (livePr.head.sha !== context.payload.workflow_run.head_sha) {
core.info(`Stale run: workflow SHA ${context.payload.workflow_run.head_sha} != PR head ${livePr.head.sha}`);
core.setOutput('skip', 'true');
return;
}
core.setOutput('skip', 'false');
core.setOutput('number', String(pr.number));
core.setOutput('base', livePr.base.ref);
core.setOutput('head-sha', livePr.head.sha);
- name: Find size workflow run for this commit
if: steps.pr-meta.outputs.skip != 'true'
id: find-size
uses: actions/github-script@v8
with:
script: |
const headSha = '${{ steps.pr-meta.outputs.head-sha }}';
const { data: runs } = await github.rest.actions.listWorkflowRuns({
owner: context.repo.owner,
repo: context.repo.repo,
workflow_id: 'ci-size-data.yaml',
head_sha: headSha,
per_page: 1,
});
const run = runs.workflow_runs[0];
if (!run) {
core.setOutput('status', 'pending');
return;
}
if (run.status !== 'completed') {
core.setOutput('status', 'pending');
return;
}
if (run.conclusion !== 'success') {
core.setOutput('status', 'failed');
return;
}
core.setOutput('status', 'ready');
core.setOutput('run-id', String(run.id));
- name: Find perf workflow run for this commit
if: steps.pr-meta.outputs.skip != 'true'
id: find-perf
uses: actions/github-script@v8
with:
script: |
const headSha = '${{ steps.pr-meta.outputs.head-sha }}';
const { data: runs } = await github.rest.actions.listWorkflowRuns({
owner: context.repo.owner,
repo: context.repo.repo,
workflow_id: 'ci-perf-report.yaml',
head_sha: headSha,
per_page: 1,
});
const run = runs.workflow_runs[0];
if (!run) {
core.setOutput('status', 'pending');
return;
}
if (run.status !== 'completed') {
core.setOutput('status', 'pending');
return;
}
if (run.conclusion !== 'success') {
core.setOutput('status', 'failed');
return;
}
core.setOutput('status', 'ready');
core.setOutput('run-id', String(run.id));
- name: Download size data (current)
if: steps.pr-meta.outputs.skip != 'true' && steps.find-size.outputs.status == 'ready'
uses: dawidd6/action-download-artifact@0bd50d53a6d7fb5cb921e607957e9cc12b4ce392 # v12
with:
name: size-data
run_id: ${{ steps.find-size.outputs.run-id }}
path: temp/size
- name: Download size baseline
if: steps.pr-meta.outputs.skip != 'true' && steps.find-size.outputs.status == 'ready'
uses: dawidd6/action-download-artifact@0bd50d53a6d7fb5cb921e607957e9cc12b4ce392 # v12
with:
branch: ${{ steps.pr-meta.outputs.base }}
workflow: ci-size-data.yaml
event: push
name: size-data
path: temp/size-prev
if_no_artifact_found: warn
- name: Download perf metrics (current)
if: steps.pr-meta.outputs.skip != 'true' && steps.find-perf.outputs.status == 'ready'
uses: dawidd6/action-download-artifact@0bd50d53a6d7fb5cb921e607957e9cc12b4ce392 # v12
with:
name: perf-metrics
run_id: ${{ steps.find-perf.outputs.run-id }}
path: test-results/
- name: Download perf baseline
if: steps.pr-meta.outputs.skip != 'true' && steps.find-perf.outputs.status == 'ready'
uses: dawidd6/action-download-artifact@0bd50d53a6d7fb5cb921e607957e9cc12b4ce392 # v12
with:
branch: ${{ steps.pr-meta.outputs.base }}
workflow: ci-perf-report.yaml
event: push
name: perf-metrics
path: temp/perf-baseline/
if_no_artifact_found: warn
- name: Download perf history from perf-data branch
if: steps.pr-meta.outputs.skip != 'true' && steps.find-perf.outputs.status == 'ready'
continue-on-error: true
run: |
if git ls-remote --exit-code origin perf-data >/dev/null 2>&1; then
git fetch origin perf-data --depth=1
mkdir -p temp/perf-history
for file in $(git ls-tree --name-only origin/perf-data baselines/ 2>/dev/null | sort -r | head -15); do
git show "origin/perf-data:${file}" > "temp/perf-history/$(basename "$file")" 2>/dev/null || true
done
echo "Loaded $(ls temp/perf-history/*.json 2>/dev/null | wc -l) historical baselines"
fi
- name: Generate unified report
if: steps.pr-meta.outputs.skip != 'true'
run: >
node scripts/unified-report.js
--size-status=${{ steps.find-size.outputs.status }}
--perf-status=${{ steps.find-perf.outputs.status }}
> pr-report.md
- name: Remove legacy separate comments
if: steps.pr-meta.outputs.skip != 'true'
uses: actions/github-script@v8
with:
script: |
const prNumber = Number('${{ steps.pr-meta.outputs.number }}');
const legacyMarkers = [
'<!-- COMFYUI_FRONTEND_SIZE -->',
'<!-- COMFYUI_FRONTEND_PERF -->',
];
const comments = await github.paginate(github.rest.issues.listComments, {
owner: context.repo.owner,
repo: context.repo.repo,
issue_number: prNumber,
per_page: 100,
});
for (const comment of comments) {
if (legacyMarkers.some(m => comment.body?.includes(m))) {
await github.rest.issues.deleteComment({
owner: context.repo.owner,
repo: context.repo.repo,
comment_id: comment.id,
});
core.info(`Deleted legacy comment ${comment.id}`);
}
}
- name: Post PR comment
if: steps.pr-meta.outputs.skip != 'true'
uses: ./.github/actions/post-pr-report-comment
with:
pr-number: ${{ steps.pr-meta.outputs.number }}
report-file: ./pr-report.md
comment-marker: '<!-- COMFYUI_FRONTEND_PR_REPORT -->'
token: ${{ secrets.GITHUB_TOKEN }}