On Tue, Feb 7, 2017 at 2:38 PM, Harald Kirschner <har...@mozilla.com> wrote:
> > To better understand the long tail of slow process startup, 95th > percentile is over 5s, the context of this metric could : > I doubt that I'm the right person to own a deep dive into this, but I will attempt to provide the answers I can right now. > > 1) How often is a content process started during a user's session? This > would define if we should track the long tail or median (probably both). > With single-process e10s, this is once at app startup, plus once every time a content process crashes. With e10s-multi, there are additional launches that may happen at other times. With a bug I just patched, we'll also launch new content processes whenever we detect that one of them is near-OOM. With a custom query it's possible to count these as per-usage-hour or per some other denominator. > > 2) Probably related to Gabor's question: How does this metric fit into the > breakdown of timings from interaction to tab loading? Is it the major part > or are there other metrics we need to consider? > I don't know exactly how to answer this: it's clearly part of the critical path from the time a user launches Firefox to having usable web content, but I don't think it blocks the start page if the user is using the default start page instead of restore-tabs or a custom start page. > > 3) Do we know the circumstances that cause the long tail? > I suspect not. --BDS _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
