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by Cthulhu_ 1308 days ago
Jest, probably the most popular JS test runner of today, also has had it since forever.
2 comments
solardev 1308 days ago
My Jest can run on only changed files, but it still takes forever. Much longer than 250ms
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_cfl0 1308 days ago
Right.. Because out of a 100 tests it will run close to that number. when you change code most of the time only a handful of tests or less need to run.
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_cfl0 1308 days ago
Had what since forever? Does jest analyze the changes you make and compare them to code coverage? (hint: no)

The key innovation piece here is the speed that the extreme selectively enables you.

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