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TypeScript 7 vs 6
Type-Checking Performance Report
Reproducible tsc --noEmit comparison between the native TypeScript 7
compiler and TypeScript 6, across synthetic fixtures and a pinned real-world project
(zod), measuring wall-clock time and peak memory per
--checkers setting.
SUMMARY METRIC
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Mean check time by fixture
TS6
TS7
Speedup scaling with --checkers
Detailed results
| Fixture | Checkers | Version | Mean | Median | StdDev | Max Memory (MB) |
|---|
Runner hardware
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Compilers
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Methodology
hyperfine, 10 timed runs + 2 warmups
Peak RSS via GNU time (-v)
tsc --noEmit, project mode (-p)