Greetings, The presentation of start-up crashes on crash-stats has improved recently. If you look at the top crashes for Nightly (https://crash-stats.mozilla.com/topcrashers/?product=Firefox&version=52.0a1&days=7) you will see three different icons that are next to some crash signatures: a rocket, a red flag, and a yellow flag. If you hover over these you will see the following explanatory tool-tips.
- Rocket: "Potential Startup Crash, more than half of the crashes happened during the first minute after launch". This icon has been used for a long time and its meaning has not changed. - Red flag: "Startup Crash, all crashes happened during startup". This icon was added in https://bugzilla.mozilla.org/show_bug.cgi?id=1297966. Its presence is based on a new annotation in crash reports, called "StartupCrash", which was added in https://bugzilla.mozilla.org/show_bug.cgi?id=1295934 and landed in Firefox 51. The annotation is initially set to 1 and then gets set to zero once the browser reaches a certain point during start-up. This annotation is only added in the chrome process. See the bug for more details. - Yellow flag: "Potential Startup Crash, M out of N crashes happened during startup". This is similar to the red flag, but applied when not all crashes have StartupCrash=1. It is never shown at the same time as the red flag. The rocket heuristic is fairly crude (e.g. it's affected by the speed of your computer) and generous and so may include crashes that aren't genuine start-up crashes; it also can only be applied to a group of crashes, as opposed to a single crash. The StartupCrash annotation has a much clearer meaning. It is also stricter, and so quite a few crash signatures have the rocket icon but neither flag icon. You can also view the StartupCrash annotation for individual crashes and search for it. The exact definition of "startup crash" isn't clear in general, so some crashes that some people might consider "startup crashes" may not get both a rocket icon and a flag icon. But if a crash signature has the red flag icon, it meets a quite strict definition of "startup crash", and should be prioritized accordingly. Also, crash signature with a yellow flag icon and a high StartupCrash=1 proportion should be considered similarly. It's possible that the rocket icon will go away eventually. We are currently evaluating the flag icons against the rocket icon to see how they compare. Feedback is welcome. (For example, it just occurred to me that the red vs. yellow distinction might be problematic for colour-blind users.) Thank you. Nick _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
