786a38e773
According to the [jest docs], setting `maxWorkers=4` can substantially improve performance on CI. This commit sets `maxWorkers=4` when running `yarn unit` as a part of `yarn test`. Based on my local testing (see data below), this improves performance locally in addition to the expected performance improvement on travis. \## Testing `yarn unit` by itself ``` yarn unit --maxWorkers=1 15.28s user 3.71s system 112% cpu 16.848 total 15.13s user 3.68s system 112% cpu 16.708 total 15.32s user 3.76s system 112% cpu 16.917 total 15.91s user 3.74s system 112% cpu 17.425 total 15.61s user 3.76s system 113% cpu 17.125 total yarn unit --maxWorkers=2 19.43s user 4.03s system 212% cpu 11.061 total 19.86s user 4.19s system 210% cpu 11.407 total 21.19s user 4.26s system 213% cpu 11.902 total 20.68s user 4.51s system 212% cpu 11.873 total 20.78s user 4.26s system 212% cpu 11.780 total yarn unit --maxWorkers=4 29.43s user 5.14s system 389% cpu 8.865 total 29.99s user 5.18s system 392% cpu 8.961 total 32.22s user 5.52s system 390% cpu 9.659 total 33.99s user 5.97s system 395% cpu 10.097 total 33.38s user 5.93s system 395% cpu 9.933 total yarn unit --maxWorkers=8 48.21s user 6.57s system 621% cpu 8.815 total 51.61s user 7.16s system 610% cpu 9.622 total 59.48s user 7.82s system 621% cpu 10.833 total 58.18s user 8.10s system 624% cpu 10.607 total 58.92s user 8.22s system 620% cpu 10.817 total unset 46.27s user 6.44s system 599% cpu 8.799 total 49.08s user 7.04s system 600% cpu 9.342 total 54.85s user 7.52s system 600% cpu 10.383 total 55.66s user 7.52s system 605% cpu 10.438 total 53.77s user 7.50s system 604% cpu 10.142 total ``` \## Testing `yarn test` ``` maxWorkers=1 46.65s user 5.92s system 249% cpu 21.038 total 47.94s user 5.81s system 251% cpu 21.354 total 51.50s user 6.44s system 260% cpu 22.234 total 52.60s user 6.65s system 268% cpu 22.077 total 53.04s user 6.27s system 266% cpu 22.278 total maxWorkers=2 56.13s user 6.13s system 409% cpu 15.204 total 63.32s user 7.22s system 412% cpu 17.091 total 64.82s user 7.19s system 422% cpu 17.027 total 64.59s user 7.41s system 417% cpu 17.227 total 65.40s user 7.30s system 419% cpu 17.318 total maxWorkers=4 74.64s user 7.60s system 584% cpu 14.066 total 82.69s user 8.43s system 582% cpu 15.643 total 85.00s user 8.68s system 591% cpu 15.835 total 84.81s user 8.58s system 595% cpu 15.690 total 85.22s user 8.59s system 596% cpu 15.719 total maxWorkers=4 and everything depends on unit 59.29s user 6.01s system 378% cpu 17.261 total 62.99s user 6.64s system 375% cpu 18.564 total 65.54s user 7.31s system 375% cpu 19.419 total 63.24s user 7.13s system 379% cpu 18.548 total 63.68s user 7.13s system 383% cpu 18.457 total maxWorkers=8 92.85s user 8.13s system 643% cpu 15.702 total 101.63s user 9.21s system 632% cpu 17.510 total 101.63s user 9.23s system 636% cpu 17.428 total 101.81s user 9.32s system 633% cpu 17.546 total 101.62s user 9.39s system 632% cpu 17.542 total unset 88.75s user 8.15s system 646% cpu 14.988 total 96.43s user 9.23s system 631% cpu 16.739 total 98.27s user 9.17s system 638% cpu 16.819 total 98.46s user 9.01s system 642% cpu 16.729 total 98.53s user 9.15s system 637% cpu 16.889 total unset + everything depends on unit 76.02s user 7.61s system 486% cpu 17.208 total 79.14s user 8.26s system 484% cpu 18.030 total 84.32s user 9.19s system 488% cpu 19.136 total 84.92s user 9.14s system 497% cpu 18.919 total 84.46s user 8.94s system 492% cpu 18.965 total ``` Test plan: `yarn test` passes here and on travis [jest docs]: https://jestjs.io/docs/en/troubleshooting |
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| .. | ||
| jest | ||
| RemoveBuildDirectoryPlugin.js | ||
| babel.js | ||
| env.js | ||
| paths.js | ||
| polyfills.js | ||
| test.js | ||
| webpack.config.backend.js | ||
| webpack.config.web.js | ||