I've been using the Phaser.io 2 game engine which runs on Pixi.js as it's primary renderer. However, I've seen some stuttering in the rendering methods directly that I can't seem to pin down. On Chrome, I've managed to smooth things out but not precisely, while on Firefox things run very smoothly, and apparently in other browser and mini-browsers as well.
Today, I recorded a gif of the effect with the main Pixi.js site open in both:
https://i.gyazo.com/23ede3852844317c3abda424a06b9adc.mp4
I have asked others to look at the rendering on Chrome and they have also seen this stuttering, however in the gif, with Chrome on the left and Firefox on the right, it's very obvious something is not correct.
Is there any possible cause that should be looked at, or known issues?
Try enabling hardware acceleration in Chrome settings->search 'hardware acceleration'
Related
I have an app written with Konva.js, and it works really smoothly on both my 13-year-old PC and my wife's iPhone XR - it's just perfect. But whenever I run it on my Xiaomi Redmi 9 Pro and also my older one, Xiaomi Redmi Note 4X in many different browsers including Chrome, Opera and Firefox, it is really slow. I have animations using Konva.Tween and also some draggable nodes, and both of them work unbelievably slowly, FPS seems to be close to zero.
The strangest part is, I tried moving draggable nodes to a separate layer right before the dragging starts, and it doesn't speed up dragging at all, not one bit, at least visually, I didn't measure the actual FPS. So to me it seems like I am facing a limitation of my phone's performance here or there's something else which I do not see.
What is it that might cause the issue?
First, you should run the performance profile on your phone and take a look at what exactly is slow. Konva code execution? Native 2d canvas rendering? Browser layout work?
Also try to experiment with Konva.pixelRatio property https://konvajs.org/docs/performance/All_Performance_Tips.html.
Konva.pixelRatio = 1;
The image may be blurry on HPDI device, but probably it will be good enough. Probably default pixel ratio is too high. You can try different values like 1 or 1.5.
Okay, so I'm running into a weird issue with a game I'm developing all of the sudden, I'm just wondering if anyone has seen something like this before:
When my window is sized below ~600,000 pixels, it runs very smooth. This is a profile taken at 989x610px:
When my windows is sized a little bit up from that, it slows to a halt, using 99% CPU and running at like 7fps. This was taken at 990x610px (1px wider):
The 990 isn't hard-coded anywhere, because the exact width that it slows down at is dependent on the height, it's more of a "total pixels" thing.
Anyway, I'm just wondering if anyone has seen this before, if it's a known issue, or if I should be filing a bug report with the chrome team.
When your window is that size or when your canvas is that size?
Either way I'm guessing its merely a Chrome bug and you should file a bug report. You should also test to see if its working on Chrome Canary.
There have been similar bugs in the past, such as this still-not-fixed bugs in Chrome for Android where the canvas has distinct functionality above and below 64k total pixels (see bugs here and here)
I am currently developing a web application focusing primarily on Chrome 24.01312.57 and IE10. In the former browser, I am experiencing a large amount of lag. However, the latter experiences little to no lag, which is quite opposite to what everyone claims.
To show you the difference, I am recording the screens of my netbook using an iPhone while scrolling down The Chrome Webstore - something Google itself created.
Testing Equipment
2 year old Gateway Netbook -Single Core Intel Atom - 1GB RAM - Win7
iPhone camera (not that great recording solution, but it is quite easy to spot the difference)
Website: https://chrome.google.com/webstore/category/home (I scrolled down quite a bit for both the browsers before starting the test for those worried of AJAX loaded content slowing down the rendering)
Results
Google Chrome 24 (No extensions) scrolling down the Webstore:
http://www.youtube.com/watch?v=njkRqiNJPIY
Internet Explorer (No addons) 10 on the same page:http://www.youtube.com/watch?v=B_E_9OzPers
Note: Look at the mouse cursor and the scroll thumb - on IE10, the mouse is always on the the thumb whereas Chrome, it is all over the place indicating a high latency between mouse movement and the actual rendering.
Bottom Line:
Before I conclude, do realize that these lags on Google Chrome are increasingly magnified as the website becomes more complex and/or the specs go lower. However, IE10 is pushing the FPS quite high even in these conditions. I also did some analysis of the Chrome timeline. In reveals that the FPS drops as you zoom out to the point where rendering takes up to ~900ms per frame (on the Google Webstore) while IE10 is still fluid smooth (and better yet it retains that smoothness on an atom netbook)
As web developers, is there some CSS property/ies that is causing Chrome to render the pages with lag?
Why is Internet Explorer rendering so quickly?
What can be some steps to make Chrome render as quickly as IE10?
PS: Bug Report: http://code.google.com/p/chromium/issues/detail?id=163092 but no recent developments on this currently.
Chrome struggles with painting, especially at high resolutions such as 2560x1440 and above. Many websites such as the Chrome Web Store, Facebook, etc. exhibit significant scroll lag on it. IE10 maintains 120 fps on my monitor while scrolling on these sites.
I just had and fixed a similar issue.
Apparently Chrome isn't too smart about their recalculation of styles, besides that being terribly slow, so I focused on preventing it from recalculating anything.
I added the 'scrolled' class whenever the scroll event was triggered, but if it was already there, Chrome kept recalculating the new styles anyway. When I modified it to be like:
if (!body.hasClass('scrolled')) { body.addClass('scrolled'); }
Chrome suddenly experienced a significant speedup (still no IE or FF, but much better than before)
It's the video card on the Netbook! You will experience similar effect on almost everithing that moves on your screen.
I have a Netbook...
The web you are testing crashed Chrome browser until not long ago...
A website I'm currently designing displays and works perfectly in all mac browsers, and Windows Firefox, Chrome and IE 8.
I'm having major problems in IE 7 though. Whilst the CSS is pretty much there (a few tweaks needed), the site is maxing out my CPU at 100% rendering the site almost unusable and giving me scripting errors and javascript functionality is not working.
I don't even know where to start trying to find out what's maxing out the CPU, or how to get more info on the scripting messages - it tells me the line the problem is on but it doesn't tell me what file.
I'd like to provide a link but the client has asked me not to.
Any help would be greatly appreciated.
Thank you
Most likely, this issue is caused by ie's poor png rendering capabilities. In the situation that I have experienced, we were using jquery ui 1.8.7 to render modal dialogs and seeing the memory usage spike by 6-8 mega every time a dialog box was opened. It turns out that the culprit was the opacity and alpha CSS settings in the default jquery styles. See this post for a possible partial fix.
Other things to note include:
There seem to be many fixes that attempt to address this issue.
Jquery 1.8.16 has a partial fix where the large memory jump will only happen when the first dialog box is opened.
We have also experimented by setting a single pixel png as the modal background and this rendering of a single pixel caused the memory used by IE to spike 80 megs and caused a temporary spike in CPU usage.
One other peculiar observation was that if we set the modal value of the jquery dialog to false and created our own modal background by appending a div whose background was set to a semi-transparent png, the memory leak seemed to be smaller.
The short of it was to stop using transparent pngs and the opacity and alpha settings foe rendering in IE.
I'm developing a personal website, http://www.miketurley.com.
In any Webkit browser (Chrome, Safari) or Firefox, when you mouse-over the text on my site's opening screen, you get a slick animation which slides the text around and reveals the menu ("waking up" my website.) This may not be too necessary, but I like it and I think it's appropriate to showcase skills like that on my portfolio website.
Anyway, if you go to my website in Internet Explorer, the animations do not appear at all. The same duration of time goes by, and then the page "snaps" into the post-animation state in one frame, with no motion in between.
How can I fix this?
An explanation of this particular animation along with source code is available here: http://www.miketurley.com/index_explain.html
Leaving eval aside, you site is failing to quirks mode in IE. Using dev tools I switched to different Document Mode and the animations ran just nice. Can't find out what activates quirks right now but you have an issue to investigate. Start with passing the strict validation or moving to transitional or html5 <!doctype html>