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comparison: dom/browser-element/mochitest/priority/CAUTION
dom/browser-element/mochitest/priority/CAUTION
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| 1 A word to the wise: | |
| 2 | |
| 3 You must ensure that if your test finishes successfully, no processes have | |
| 4 priority FOREGROUND_HIGH. | |
| 5 | |
| 6 If you don't do this, expect to see tests randomly fail with mysterious | |
| 7 FOREGROUND --> FOREGROUND priority transitions. | |
| 8 | |
| 9 What's happening in this case is that your FOREGROUND_HIGH process lives until | |
| 10 the beginning of the next test. This causes the process started by the next | |
| 11 test to have low CPU priority. Then the FOREGROUND_HIGH process dies, because | |
| 12 its iframe gets GC'ed, and we transition the new test's process from low CPU | |
| 13 priority to regular CPU priority. | |
| 14 | |
| 15 Ouch. |
