I just ran Ensemble on mac with the latest, with pulse logger turned on. Ran the SequentialTransition demo and I agree it didn't look smooth, even though the pulse logger reports that of over 3,000 pulses, not a single one crossed the 16ms threshold. Is the grid background causing an optical illusion? (as the shape passes a boundary it may temporarily looked wider and then shorter making it look like it is changing size / speed??)
Richard On Jul 25, 2013, at 9:28 AM, Richard Bair <richard.b...@oracle.com> wrote: > I don't see his link to impact.js, can you send it again? > > Usually the stutters that we see are the result of threading problems between > Glass & Prism rather than a performance (fps) problem. You probably saw the > issue come by yesterday that smoothed this out on the mac. In order to get > rid of these, what we need to do is have a way to measure when they happen, > and have a reproducible example. I've seen them forever on the mac (but now > that *should* be fixed), but on windows I've never seen them (windows was > always exceptionally smooth for me), and that has been the primary challenge > in nailing it down. > > It may be related to drift -- 1/60th of a second is 16.666666… ms long, and > the timer used to get pulses may be running at 16ms for example, in which > case there is drift where eventually it takes 2 frames worth of time to draw > a single frame because we're waiting on the card. > > I'm not sure how WebView's interaction with prism would be avoiding this, but > that's what it sounds like. > > We also recently changed the way the FX thread and render thread interact so > as not to drop frames. I would expect that to have an impact in smoothing > things out as well. > > Are you building locally or are you using one of the promoted builds? Do you > see the hiccups right now in Ensemble? > > Richard > > On Jul 25, 2013, at 3:21 AM, Felix Bembrick <felix.bembr...@gmail.com> wrote: > >> I have noticed something curious. >> >> When I run the impact.js demo that Klaus posted a link to I see a very >> smooth animation. The curious part is that on this same machine I see >> noticeable flicker and jittering when I run even the most simple JavaFX >> animation and have never seen one that performs as smoothly as the impact.js >> demo within WebView. Also, the impact.js demo runs very smoothly even when >> I run the WebView maximised. >> >> OK, so now I know that it can't be the actual graphics hardware or driver >> that cause JavaFX animations to flicker and clearly JavaFX *can* render >> animated content without jittering so why then do simple animations (such as >> those from Ensemble) perform so poorly? >> >> >> On 25 July 2013 02:02, Artem Ananiev <artem.anan...@oracle.com> wrote: >> >> On 7/24/2013 2:55 AM, Felix Bembrick wrote: >> Windows 7 64-bit here. >> >> On this platform, JavaFX web component is compiled without JIT support for >> JavaScript: >> >> https://javafx-jira.kenai.com/browse/RT-24998 >> >> It explains why it is slow, but it doesn't explain rendering artifacts. >> >> Thanks, >> >> Artem >> >> >> On 24 July 2013 08:53, Richard Bair <richard.b...@oracle.com> wrote: >> >> I've filed https://javafx-jira.kenai.com/browse/RT-31885, lets see how >> that turns out. >> >> Richard >> >> On Jul 23, 2013, at 3:49 PM, Richard Bair <richard.b...@oracle.com> wrote: >> >> Doh, that's just what you said :-) >> >> On Jul 23, 2013, at 3:49 PM, Richard Bair <richard.b...@oracle.com> >> wrote: >> >> I'm not seeing anything at all, beyond a fuzzy background image >> (similar app to yours): >> >> import javafx.application.Application; >> import javafx.scene.Scene; >> import javafx.scene.web.WebView; >> import javafx.stage.Stage; >> >> public class HelloWebView extends Application { >> @Override public void start(Stage stage) throws Exception { >> WebView web = new WebView(); >> web.getEngine().load("http://famo.us/";); >> Scene scene = new Scene(web); >> stage.setScene(scene); >> stage.setTitle("HelloWebView"); >> stage.show(); >> } >> >> public static void main(String[] args) { >> launch(args); >> } >> } >> >> I'm on Mac. What OS are you running on? >> >> >> >> >
