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perf: cache tsconfig parsing within bundless batches - #875
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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Cache tsconfig lookup and parsing within each bundless file batch to avoid repeated scans. Watch rebuilds start with a fresh cache; declaration generation copies compiler options before modifying them.
Local build, type checking and all 191 tests passed. A synthetic 1,000-file SWC ESM+CJS benchmark (declarations disabled; three-run medians) improved from 24.31s to 2.47s cold and 12.30s to 1.49s warm, with identical outputs.
Internal
getTsconfig()results are now shared within a batch; plugins mutating them may affect later reads.