ci: fix size metrics failures and remove broken repo-stats

[HTRamsey]

Summary

• Fix persistent Size Metrics failures — the benchmark-action/github-action-benchmark action was failing on every master push because sparse checkout prevented git checkout - after switching to gh-pages. Replaced with a cache-based approach: baseline metrics are cached on master push, restored and compared on PRs, with a size report comment posted automatically.
• Remove repo-stats.yml — used the archived lowlighter/metrics action which was failing 4/5 recent runs and producing no usable output.
• Remove ensure-branch action — no longer referenced after the benchmark-action removal.

Test plan

• Merge to master triggers size-metrics job; baseline is cached without errors
• Subsequent PR triggers size comparison and posts a Binary Size Report comment
• No remaining references to ensure-branch, benchmark-action, or lowlighter/metrics

[Copilot]

Pull request overview

This PR addresses persistent Size Metrics failures in CI by replacing the benchmark-action/github-action-benchmark approach (which failed due to sparse checkout preventing git checkout - after gh-pages branch operations) with a simpler cache-based solution. It also removes the failing repo-stats.yml workflow that used the archived lowlighter/metrics action, and deletes the now-unused ensure-branch composite action.

Changes:

• Replaced benchmark-action with GitHub Actions cache for storing/comparing size metrics baselines
• Implemented custom JavaScript comparison and PR comment posting for binary size reports
• Removed repo-stats.yml workflow that used deprecated lowlighter/metrics action
• Removed ensure-branch composite action (no longer needed)
• Changed size-metrics job permissions from contents: write to contents: read (security improvement)

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.

File	Description
.github/workflows/repo-stats.yml	Deleted entire workflow that used archived lowlighter/metrics action
.github/workflows/performance.yml	Replaced benchmark-action with cache-based approach; implemented custom size comparison in JavaScript; removed ensure-branch from sparse-checkout; reduced permissions
.github/actions/ensure-branch/action.yml	Deleted composite action that created gh-pages branch (no longer needed)

[github-actions]

Build Results

Platform Status

Platform	Status	Details
Linux	Passed	View
Windows	Passed	View
MacOS	Passed	View
Android	Passed	View
All builds passed.

Pre-commit

Check	Status	Details
pre-commit	Failed	View

Pre-commit hooks: 32 passed, 82 failed, 10 skipped.

Artifact Sizes

Artifact	Size	Δ from master
QGroundControl-aarch64.AppImage	195.92 MB	+6.29 MB (increase)
QGroundControl-installer-AMD64-ARM64.exe	76.93 MB
QGroundControl-installer-AMD64.exe	164.99 MB
QGroundControl-installer-ARM64.exe	77.88 MB
QGroundControl-mac.apk	187.71 MB
QGroundControl-windows.apk	187.74 MB
QGroundControl-x86_64.AppImage	187.58 MB	+10.02 MB (increase)
QGroundControl.apk	332.47 MB
QGroundControl.dmg	318.74 MB	-4.66 MB (decrease)
size-metrics.AppImage	0.00 MB
test-duration-linux_gcc_64.AppImage	0.00 MB	-0.00 MB (decrease)

Total size increased by 11.65 MB

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_{Updated: 2026-02-25 07:35:21 UTC • Triggered by: Linux}