// Measure and compare TypeScript memory usage for @regle/core and test typechecks. Use when checking TS server pressure, type-level perf regressions, or before/after heavy generic typing changes.
| name | ts-memory-baseline |
| description | Measure and compare TypeScript memory usage for @regle/core and test typechecks. Use when checking TS server pressure, type-level perf regressions, or before/after heavy generic typing changes. |
| metadata | {"author":"regle","version":"2026.03.19"} |
This skill defines a reproducible process to measure TypeScript memory usage in this repository.
pnpm build before any test-related measurement.pnpm run test:typecheck should never fail. If it fails, treat the run as invalid for regression tracking.PATH="/Users/victorgarcia/.nvm/versions/node/v24.14.0/bin:$PATH"
node -v
pnpm -v
Expected:
v24.x11.1.2 (or project-compatible version)tests/TS_MEMORY_BASELINE_RESULTS.md.PATH="/Users/victorgarcia/.nvm/versions/node/v24.14.0/bin:$PATH" \
./node_modules/.bin/tsc -p "packages/core/tsconfig.json" --noEmit --extendedDiagnostics
Capture:
Memory usedInstantiationsCheck timeRun build first:
PATH="/Users/victorgarcia/.nvm/versions/node/v24.14.0/bin:$PATH" pnpm build
Then:
PATH="/Users/victorgarcia/.nvm/versions/node/v24.14.0/bin:$PATH" \
/usr/bin/time -l pnpm run test:typecheck
Capture:
0)maximum resident set sizepeak memory footprintreal/user/sysRecommended sequence:
# warm-up (discard)
PATH="/Users/victorgarcia/.nvm/versions/node/v24.14.0/bin:$PATH" \
/usr/bin/time -l corepack pnpm run test:typecheck
# measured runs (collect all 3)
PATH="/Users/victorgarcia/.nvm/versions/node/v24.14.0/bin:$PATH" \
/usr/bin/time -l corepack pnpm run test:typecheck
PATH="/Users/victorgarcia/.nvm/versions/node/v24.14.0/bin:$PATH" \
/usr/bin/time -l corepack pnpm run test:typecheck
PATH="/Users/victorgarcia/.nvm/versions/node/v24.14.0/bin:$PATH" \
/usr/bin/time -l corepack pnpm run test:typecheck
Use median deltas because absolute values can vary with machine/CPU load.
(new - old) / old * 100.±5% for memory metrics.>5% and <=10% increase.>10% increase.Check time and real time, treat as noisy:
>15% and reproducible across runs.pnpm run test:typecheck exit code is non-zero, invalidate the run (do not update baseline).Store only numeric outcomes in:
tests/TS_MEMORY_BASELINE_RESULTS.mdDo not put procedural instructions in the results file.
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