> > Mike Conley ported scrollbox to use smooth scrolling instead of JS driven > scrolling <https://bugzilla.mozilla.org/show_bug.cgi?id=1356705>. This > affects most importantly scrolling the tab bar, and should make it more > smooth by removing a lot of slow code that used to run and off-loading that > work to the compositor through CSS-based smooth scrolling! He notes > <https://bugzilla.mozilla.org/show_bug.cgi?id=1356705#c67> on the bug > that in order to achieve great performance some follow-ups may be needed.
Just to ensure credit is given where it's due - that was 95% Dão Gottwald's work. I just helped push the last 5% over the line when he got focused on getting square tabs landed. Thanks Dão! On 4 August 2017 at 04:04, Ehsan Akhgari <ehsan.akhg...@gmail.com> wrote: > Hi everyone, > > This has been a busy week. A lot of fixes have landed, setting up the > Firefox 57 cycle for a good start. On the platform side, a notable change > that will be in the upcoming Nightly is the fix for document.cookie using > synchronous IPC. This super popular API call slows down various web pages > today in Firefox, and starting from tomorrow, the affected pages should > experience a great speedup. I have sometimes seen the slowdown caused by > this one issue to amount to a second or more in some situations, thanks a > lot to Amy and Josh for their hard work on this feature. The readers of > these newsletters know that the work on fixing this issue has gone on for a > long time, and it's great to see it land early in the cycle. > > On the front-end side, more and more of the UI changes of Photon are > landing in Nightly. One of the overall changes that I have seen is that > the interface is starting to feel a lot more responsive and snappy than it > was around this time last year. This is due to many different details. A > lot of work has gone into fixing rough edges in the performance of the > existing code, some of which I have covered but most of which is under the > Photon > Performance project <https://bugzilla.mozilla.org/show_bug.cgi?id=1363750>. > Also the new UI is built with performance in mind, so for example where > animations are used, they use the compositor and don't run on the main > thread. All of the pieces of this performance puzzle are nicely coming to > fit in together, and it is great to see that this hard work is paying off. > > On the Speedometer front, things are progressing with fast pace. We have > been fixing issues that have been on our list from the previous findings, > which has somewhat slowed down the pace of finding new issues to work on. > Although the SpiderMonkey team haven't waited around > <https://bugzilla.mozilla.org/show_bug.cgi?id=1245279> and are > continually finding new optimization opportunities out of further > investigations. There is still more work to be done there! > > I will now move own to acknowledge the great work of all of those who > helped make Firefox faster last week. I hope I am not mistakenly > forgetting any names here! > > - Andrew McCreight got rid of some cycle collector overhead > <https://bugzilla.mozilla.org/show_bug.cgi?id=1385459> related to > using QueryInterface to canonicalize the nsISupports pointers stored in the > purple buffer, and similarly for pointers encountered during traversal > of native roots <https://bugzilla.mozilla.org/show_bug.cgi?id=1385474> > as well. > - Kris Maglione added some utilities to BrowserUtils > <https://bugzilla.mozilla.org/show_bug.cgi?id=1383367> that should > help our front-end devs avoid synchronous layout and style flushes. > - Amy Chung got rid of the sync IPC messages in the cookie service > <https://bugzilla.mozilla.org/show_bug.cgi?id=1331680>! This was a > substantial amount of work and should eliminate jank on a number of sites > that get and set cookies frequently. > - Jessica Jong made us check a boolean flag instead of doing a linear > search looking for an attribute in order to determine whether an Element is > required <https://bugzilla.mozilla.org/show_bug.cgi?id=1385478>. > - André Bargull made String.prototype.toLower/UpperCase use direct VM > calls, and also added specialized unicode::CanLower/UpperCase overloads for > Latin1 characters > <https://bugzilla.mozilla.org/show_bug.cgi?id=1383647>. He also added > an Ion-inline path for Reflect.getPrototypeOf() > <https://bugzilla.mozilla.org/show_bug.cgi?id=1385802>. Additionally, > he made it possible to inline UnsafeGetReservedSlot when the object is > typed as MIRType::Value > <https://bugzilla.mozilla.org/show_bug.cgi?id=1383645>. Last but not > least, he inlined ToObject when called with MIRType::Value > <https://bugzilla.mozilla.org/show_bug.cgi?id=1383644>. > - Mike Conley ported scrollbox to use smooth scrolling instead of JS > driven scrolling <https://bugzilla.mozilla.org/show_bug.cgi?id=1356705>. > This affects most importantly scrolling the tab bar, and should make it > more smooth by removing a lot of slow code that used to run and off-loading > that work to the compositor through CSS-based smooth scrolling! He > notes <https://bugzilla.mozilla.org/show_bug.cgi?id=1356705#c67> on > the bug that in order to achieve great performance some follow-ups may be > needed. > - Olli Pettay avoided allocating element state objects needlessly when > saving the state of <input> and <select> elements > <https://bugzilla.mozilla.org/show_bug.cgi?id=1386582>. > - Tim Taubert and Michael Layzell collaborated on reducing the cost of > the FormDataListener event handler > <https://bugzilla.mozilla.org/show_bug.cgi?id=1373672> inside > sessionstore. > - C.J. Ku fine tuned nsDisplaySVGText::Paint() in several ways > <https://bugzilla.mozilla.org/show_bug.cgi?id=1385861>. > - Tom Schuster optimized String.prototype.indexOf/lastIndexOf for the > case where the search string is equal to the string itself > <https://bugzilla.mozilla.org/show_bug.cgi?id=1383646>. > - Tooru Fujisawa improved the inlining of RegExpMatcher, > RegExpSearcher and RegExpTester > <https://bugzilla.mozilla.org/show_bug.cgi?id=1366263> in IonMonkey. > - Nicholas Hurley ensured HTTP/2 pushes get canceled if they are > already in the cache > <https://bugzilla.mozilla.org/show_bug.cgi?id=1367551>. > - Jerry Shih deferred initializing some part of the platform font list > to the idle queue > <https://bugzilla.mozilla.org/show_bug.cgi?id=1368531>. > - Felipe Gomes updated the transitionend properties of <option> > elements used to implement <select> drop-downs in e10s mode in a deferred > task <https://bugzilla.mozilla.org/show_bug.cgi?id=1383205>. > > Cheers, > -- > Ehsan > > _______________________________________________ > firefox-dev mailing list > firefox-...@mozilla.org > https://mail.mozilla.org/listinfo/firefox-dev > > _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
