- Build map-coverage branch of jest locally and link the packages
yarn installin this repositoryyarn testand look at coverage/index.html
Perf testing:
node perf [number], where number is the number of test files to create and run
Without mapped coverage
| Test count | Total time | Coverage time |
|---|---|---|
| 10 | 3.00s | 0.23s |
| 100 | 7.95s | 0.47s |
| 1000 | 55.42s | 2.90s |
With mapped coverage
| Test count | Total time | Coverage time |
|---|---|---|
| 10 | 3.08s | 0.28s |
| 100 | 8.67s | 0.76s |
| 1000 | 57.18s | 4.43s |
With mapped coverage 'enabled' but no source maps supplied
| Test count | Total time | Coverage time |
|---|---|---|
| 1000 | 55.61s | 2.86s |