chore(compiler): clean up codes and update docs for isolatedModules: false #1544
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Summary
This PR updates:
the documentation which can help to improve performance, by almost 30% yayy 🎉 when using☺️
isolatedModules: false
(which is default option). This will help a lot for RFC: Performance report for each ts-jest version #1115clean up some codes
Test plan
Does this PR introduce a breaking change?
Other information
N.A