After running the xpcshell tests on Firefox 24.6 and Tor Browser, I have seen that:
- 6 tests failed on firefox, and it took 10 minutes to run those tests
- 121 test failed on tor-browser, and it took 2.5 hours to run those tests
My plan now is to automatically run the tests on all of our commits (starting from the last from mozilla), save the results and time spent running each test, and compare with the previous commit, in order to find which commits cause tests to fail.
Nicolas