AriPerkkio on Mythryl: “Latest work on Vitest's istanbuljs fork removed Babel from…”

Latest work on Vitest's istanbuljs fork removed Babel from coverage-istanbul. Instrumentation is now done with packages that Vitest dep graphs already have: magic-string and rolldown, similar to Vite's own SSR transform. Surprisingly this dep trim improved instrumentation speed 5-10x.

github.comRelease v2.0.0 · vitest-dev/istanbuljs🚨 Breaking Changes lib-instrument: Replace babel with rolldown + magic-string - by @AriPerkkio in #28 (fdd34) @vitest/istanbul-lib-instrument no longer uses Babel. Code is parsed with OXC (v...

19/10/26, 5:31 pm6 reposts37 likes

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