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Add ci+setup benchmark variation - #181
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Add a new benchmark variation that measures the end-to-end time of installing the package manager binary AND running its CI/frozen-lockfile install command. This simulates the full CI pipeline experience where the tool must be set up from scratch before dependencies can be installed. The variation works like the existing 'ci' variation but: - The measured command includes PM binary installation (npm install -g, corepack download, etc.) before the ci/frozen-lockfile command - The prepare step generates the lockfile (via regular install), then uninstalls the PM binary / purges corepack cache so the next measured run includes re-downloading it For corepack-managed PMs (yarn, berry, zpm, pnpm), the corepack cache is purged so the measured command includes the corepack download step. For npm-installed PMs (vlt, bun, deno, aube, upm, pacquet), the global package is uninstalled between runs. Changes: - New variation script: scripts/variations/ci+setup.sh - Registered in bench, benchmark.sh, process-results.sh, generate-chart.js - Added to CI workflow matrix (benchmark.yaml) - Added to app types (Variation union) and UI category lists Co-authored-by: Evert Pot <me@evertpot.com>
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📝 WalkthroughWalkthroughThis change adds a Changesci+setup benchmark
Priority: ⬇️ Low Estimated code review effort: 3 (Moderate) | ~20 minutes Change: Feature Sequence Diagram(s)sequenceDiagram
participant workflow as Benchmark workflow
participant runner as Benchmark runner
participant variation as ci+setup.sh
participant hyperfine as Hyperfine
participant results as Result processor
participant chart as Chart generator
workflow->>runner: Dispatch ci+setup benchmark
runner->>variation: Run variation for selected fixture
variation->>hyperfine: Measure configured package-manager commands
hyperfine->>results: Write benchmark results
results->>chart: Provide processed variation results
Suggested reviewers: Merge Risk: 🟡 Moderate · up to The new benchmark can understate package-manager setup time, and current versus historical averages are inconsistent. Correct the preparation lifecycle and align the averages before merging. Security Architecture ReviewSecurity architecture risk: 🔵 Low · up to The principal concern is ownership and recovery of globally installed tools, particularly for local runs or interrupted execution. The workflow uses separate hosted benchmark jobs, and the package-manager trust model largely predates this change. No new credential compromise was established, but deployment protections and credential scopes remain unverified. Retained concerns
Security review detailsSecurity Blast Radius
Security Findings and Attack Paths
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Hardening Proposals
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 60.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 5 functions across 6 files. (2 skipped: 2 unsupported.) ✨ Finishing Touches 💡 1📝 Generate docstrings 💡
🧪 Generate unit tests (beta)
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Actionable comments posted: 4
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- 🪄 Fix CodeRabbit comments on this PR
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Inline comments:
Review comments at @app/src/lib/utils.ts:
- Line 69: Remove "ci+setup" from the default scenario list in `utils.ts` so the
main chart’s average uses the same inputs as the history average; keep
`ci+setup` available as a valid end-to-end scenario elsewhere.
Review comments at @scripts/variations/ci+setup.sh:
- Line 53: Set COREPACK_HOME to a variation-specific directory before any
Corepack command in the setup script, then remove that directory during
preparation so measured commands use an empty cache without affecting other
benchmarks.
- Line 62: Update the zpm setup configuration in the ci+setup variation to
populate SETUP_INSTALL_ZPM and SETUP_UNINSTALL_ZPM with the Yarn Switch install
and matching cleanup commands used by scripts/setup.sh. Keep BENCH_CI_ZPM using
plain yarn.
- Line 39: Update the npm setup variables so ci_setup_prepare installs npm into
a dedicated prefix with a separate bootstrap cache, and SETUP_UNINSTALL_NPM
removes only those paths before measurement. Point BENCH_CI_NPM at the prepared
npm binary while preserving the dependency cache used by npm ci.
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📒 Files selected for processing (8)
.github/workflows/benchmark.yamlapp/src/lib/utils.tsapp/src/types/chart-data.tsbenchscripts/benchmark.shscripts/generate-chart.jsscripts/process-results.shscripts/variations/ci+setup.sh
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Address CodeRabbit review comments: 1. Remove ci+setup from default average calculation in utils.ts to keep the main chart average consistent with the history chart average. ci+setup remains a standalone viewable variation. 2. Use an isolated COREPACK_HOME (/tmp/bench-corepack-home) instead of relying on the undocumented 'corepack cache path' subcommand. This makes purging deterministic and prevents affecting other benchmarks. 3. Install npm into a dedicated prefix (/tmp/bench-npm) with a separate bootstrap cache (/tmp/bench-npm-cache), and properly uninstall both between runs. The measured command uses the prefix binary, preserving the dependency-level npm cache for npm ci. 4. Add Yarn Switch install/uninstall for zpm (matching setup.sh), and remove its Yarn Switch directory between runs instead of only purging corepack cache. Co-authored-by: Evert Pot <me@evertpot.com>
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Copilot review overview
🟡 Changes recommended
Setup cache handling, failure propagation, process-count preparation, and average calculations currently produce incomplete or inaccurate benchmark data.
Review effort: Balanced
Findings: 4
Open (4)
What changed in this PR
Adds an end-to-end CI benchmark that includes package-manager setup time.
Changes:
- Adds the
ci+setupbenchmark implementation. - Integrates it into execution, processing, charts, and UI.
- Enables it in the default CI matrix.
| File | Description |
|---|---|
scripts/variations/ci+setup.sh |
Implements setup-plus-CI benchmarking. |
scripts/process-results.sh |
Processes the new variation’s results. |
scripts/generate-chart.js |
Includes it in chart generation. |
scripts/benchmark.sh |
Routes the new variation. |
bench |
Registers the variation in the CLI. |
app/src/types/chart-data.ts |
Adds the variation type and validation. |
app/src/lib/utils.ts |
Adds UI categorization and ordering. |
.github/workflows/benchmark.yaml |
Adds the variation to CI runs. |
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| "cache+lockfile", | ||
| "cache+lockfile+node_modules", | ||
| "ci", | ||
| "ci+setup", |
| SETUP_UNINSTALL_BERRY="" | ||
| SETUP_UNINSTALL_ZPM="rm -rf \$HOME/.yarn/switch >/dev/null 2>&1 || true" | ||
| SETUP_UNINSTALL_PNPM="" | ||
| SETUP_UNINSTALL_PACQUET="rm -rf /tmp/pnpm12" |
Comment on lines
+228
to
+230
| # For process counting, use a representative prepare base. | ||
| BENCH_PREPARE_BASE="$BENCH_PREPARE_NPM" | ||
| collect_process_count |
…ocess count 1. Average consistency (utils.ts:168): ci+setup is intentionally excluded from calculateAverageVariationData defaults (already done in prior commit) to match the history average in use-history-data.ts. ci+setup appears in the Package Management category for standalone viewing but doesn't skew the average with setup overhead. 2. Pacquet warm npm cache (ci+setup.sh:54): Give the pacquet bootstrap install a dedicated npm cache directory (PACQUET_SETUP_CACHE) and purge it alongside /tmp/pnpm12 in SETUP_UNINSTALL_PACQUET, so the measured command does a from-scratch npm install without reusing cached tarballs from the prepare step. 3. Use && instead of ; in setup_and_ci (ci+setup.sh:89): Failed PM installations now fail fast via && instead of silently falling through to the ci command with ;. This prevents hyperfine from recording a successful timing when the setup step failed but an older binary was left behind. 4. Per-PM process count (ci+setup.sh:230): Replace the single BENCH_PREPARE_BASE with a custom collect_process_count_per_pm function that passes each PM's own BENCH_PREPARE_<PM> command to process-count.sh. This ensures each PM gets its correct lockfile, PM binary uninstall, and corepack purge before the strace'd run. Co-authored-by: Evert Pot <me@evertpot.com>
evert
approved these changes
Sep 30, 2026
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Summary
Add a new
ci+setupbenchmark variation that measures the end-to-end time of installing the package manager binary AND running its CI/frozen-lockfile install command. This simulates a full CI pipeline where the tool must be set up from scratch before dependencies can be installed.How it works
The variation builds on the existing
civariation but moves PM installation into the measured time window:Prepare step (not measured):
Measured command:
PM installation methods
npm install -g <pm>@latestruns as part of the measured commandnpm install --global pnpm@next-12 --prefix /tmp/pnpm12with the pnpm12 directory wiped between runsnpm install -g npm@latest(npm ships with Node but we reinstall latest)Changes
scripts/variations/ci+setup.sh— variation scriptbench— added to AVAILABLE_VARIATIONSscripts/benchmark.sh— added case routingscripts/process-results.sh— added to processing loopscripts/generate-chart.js— added to chart data generation.github/workflows/benchmark.yaml— added to CI matrixapp/src/types/chart-data.ts— added to Variation type unionapp/src/lib/utils.ts— added to Package Management category, sort order, and average calculationCo-authored-by: Evert Pot me@evertpot.com
Summary by CodeRabbit
ci+setupbenchmark variation that measures package-manager setup alongside CI installation.