I am not running it locally yet so not able to debug. If not clear enof you can use gitter to reach me. Now the test works, i went from 2s rerun to 0.6s => performance issue gone (completely)
I got errors to run the test and had to readd from v22.4.4 the files reporter_dispatcher.js and test_result_helpers.js Rollbacking from v22.4.4 -> rename and add TestScheduler.js TEST 2 (i dont replace the whole folder but i try just to rollback TestScheduler.js) Then i installed jest 23.0.0-alpha.1 (problem present) went to node_modules, erased jest-cli folder and replace it with the one from 22.4.4 => the performance issue gone (completely) I went to node_modules backuped the jest-cli package folder I am hunting down this each time i have time :) (top priority out of my the problem i mentioned on top, it is coming from the package jest-cli We need to find the commit between 22.4.4 and the release 23.0.0 that causes the problem. => So mainly a cache problem :) but probably something else also. ( good catch for the no-cache -> much much better but not as good as jest 22.4.4) I get ~0.605s each time i change/save the test file in watch mode I get ~2.161s each time i change/save the test file in watch mode I get: ~0.574s each time i change/save the test file in watch mode With this command: npm run testjest -runTestsByPath src\app\game\ -runInBand -watch Do not focus on 23.6.0 or 23.5.0 i tracked down the problem in 23.0.0 as mentionned also.