+Nicolás Peña <n...@chromium.org> On Sun, Aug 9, 2020 at 5:40 AM Ryosuke Niwa <rn...@webkit.org> wrote:
> On Fri, Aug 7, 2020 at 2:09 PM Rob Buis <rb...@igalia.com> wrote: > > > > I was not aware of Long Tasks API. However it seems to have a slightly > > different focus (task vs. input events). Also I am mostly interested in > > First Input Delay, and it was decided some time ago to not put it in > > Long Tasks API (see > > > https://docs.google.com/document/d/1bYMLTkjcyOZR5Jt3vrulzMSoS32zOFtwyH33f6hW_C8/edit# > ). > > The concern still withstands. We don't have dozens of slightly > different APIs that websites need to track for junks & delays during > user interactions. > > It's also unclear how this first input delay works with a single page > app which may have multiple transitions after a single page load from > the browser engine's perspective. There had been some discussions > about this in the past in Web Perf WG but I don't think we've come to > any conclusion about it. > > In general, I'm hesitant to have any of these APIs implemented in > WebKit without figuring out more coherent picture of how they'd all > fit together to address underlying use cases. > > - R. Niwa > > > On 06.08.20 20:07, Simon Fraser wrote: > > > Our feedback is that this API seems reasonable, but that there's > overlap with the "long tasks" API, > > > and it's not clear if we need both. > > > > > > Simon > > > > > >> On Aug 6, 2020, at 10:43 AM, Rob Buis <rb...@igalia.com> wrote: > > >> > > >> Hi Webkit-Dev, > > >> > > >> I would like to get an official position from Webkit on the Event > Timing Web Perf API. > > >> Besides providing information about input event latency it can be > used to obtain > > >> First Input Timing metrics. This specification builds on the > Performance Timeline > > >> specification, which is implemented in Webkit. Chrome has implemented > the Event > > >> Timing API, see the chrome status entry below. > > >> > > >> - Specification: https://wicg.github.io/event-timing/ > > >> - Explainer: https://github.com/WICG/event-timing > > >> - MDN: > https://developer.mozilla.org/en-US/docs/Web/API/PerformanceEventTiming > > >> - ChromeStatus: https://chromestatus.com/feature/5167290693713920 > > >> - Caniuse.com URL: > https://caniuse.com/#feat=mdn-api_performanceeventtiming > > >> > > >> Regards, > > >> > > >> Rob. > > >> _______________________________________________ > > >> webkit-dev mailing list > > >> webkit-dev@lists.webkit.org > > >> https://lists.webkit.org/mailman/listinfo/webkit-dev > > _______________________________________________ > > webkit-dev mailing list > > webkit-dev@lists.webkit.org > > https://lists.webkit.org/mailman/listinfo/webkit-dev > _______________________________________________ > webkit-dev mailing list > webkit-dev@lists.webkit.org > https://lists.webkit.org/mailman/listinfo/webkit-dev >
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