(In reply to Nathan Froyd [:froydnj] from comment #12) > My impression of this question is "do we have any evidence that this is impacting startup performance *to the point of* necessitating that we make moderately significant changes in firefox". Or "do the larger changes that we have to make give enough of a win to justify making them in the first place". And that seems like a fair question to ask. Because the above comments don't contain any evidence aside from "this does main thread I/O". My understanding is that just not reading these files as part of normal Firefox startup isn't actually a significant change. The comments so far indicate that we can just do so today as long as we ignore `-app` and local builds without omni jar. Am I missing something? Gathering data here (and likewise for all the other similar bugs along the lines of "let's just read this one small file real quick") would be a significant task that sets us back several releases. I don't think doing that makes sense.
Bug 1543761 Comment 13 Edit History
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(In reply to Nathan Froyd [:froydnj] from comment #12) > My impression of this question is "do we have any evidence that this is impacting startup performance *to the point of* necessitating that we make moderately significant changes in firefox". Or "do the larger changes that we have to make give enough of a win to justify making them in the first place". And that seems like a fair question to ask. Because the above comments don't contain any evidence aside from "this does main thread I/O". My understanding is that just not reading these files as part of normal Firefox startup isn't actually a significant change. The comments so far indicate that we can just do so today as long as we make an exception for runs with `-app` and local builds without omni jar. Am I missing something? Gathering data here (and likewise for all the other similar bugs along the lines of "let's just read this one small file real quick") would be a significant task that sets us back several releases. I don't think doing that makes sense.