Speed up diagnostics tests - #762
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Summary
skipLibCheckfor mocked TypeScript programs in the diagnostics test harnessPerformance
A controlled v4 run over 14 diagnostic and quick-fix tests measured:
skipLibCheck: trueskipLibCheck: falseskipLibCheck: trueThis is approximately 57.5% lower wall time and 36% lower peak memory.
Validation
pnpm codegenpnpm lint-fixpnpm checkpnpm testpnpm test:v4