Mikel Reporter
	Description • 9 years ago

User Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:42.0) Gecko/20100101 Firefox/42.0
Build ID: 20150715030207

Steps to reproduce:

1) Enter agar.io games
2) Play the game
3) Observe the game getting hitches and drop of frames (jank)

*Attaching a performance recording while playing on my machine.


Actual results:

The games drops frames and gets pretty janky at times.


Expected results:

Maintain a smooth 60fps gameplay without drop of frames.

	Loic
	Comment 1 • 9 years ago

did you test with e10s enabled or disabled?

	Gary [:streetwolf52]
	Comment 2 • 9 years ago

I tried it with e10s enabled and disabled and did find it a little sluggish both ways.

Mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:42.0) Gecko/20100101 Firefox/42.0

Graphics
--------

Adapter Description: AMD Radeon R9 200 / HD 7900 Series
Adapter Drivers: aticfx64 aticfx64 aticfx64 aticfx32 aticfx32 aticfx32 atiumd64 atidxx64 atidxx64 atiumdag atidxx32 atidxx32 atiumdva atiumd6a atitmm64
Adapter RAM: 3072
Asynchronous Pan/Zoom: none
ClearType Parameters: D [ Gamma: 2200 Pixel Structure: R ClearType Level: 100 Enhanced Contrast: 300 ] D [ Gamma: 2200 Pixel Structure: R ClearType Level: 50 Enhanced Contrast: 100 ]
Device ID: 0x6798
Direct2D Enabled: true
DirectWrite Enabled: true (6.3.9600.17795)
Driver Date: 6-22-2015
Driver Version: 15.200.1046.0
GPU #2 Active: false
GPU Accelerated Windows: 1/1 Direct3D 11 (OMTC)
Subsys ID: 00000000
Supports Hardware H264 Decoding: true
Vendor ID: 0x1002
WebGL Renderer: Google Inc. -- ANGLE (AMD Radeon R9 200 / HD 7900 Series Direct3D11 vs_5_0 ps_5_0)
windowLayerManagerRemote: true
AzureCanvasBackend: direct2d 1.1
AzureContentBackend: direct2d 1.1
AzureFallbackCanvasBackend: cairo
AzureSkiaAccelerated: 0

	Mikel Reporter
	Comment 3 • 9 years ago

(In reply to Loic from comment #1)
> did you test with e10s enabled or disabled?

I have tested this with e10 enabled.

	noitidart
	Comment 4 • 9 years ago

Me and mfinkle second this. mfinkle said this:

12:49	mfinkle	works great on chrome, crappy on Firefox
12:50	mfinkle	it seems like gc pauses happen, ruining the game play

	noitidart
	Comment 5 • 9 years ago

This is still a major issue in Firefox 43. As soon as multiple blobs come in, it is super janky.

	Hallvord R. M. Steen [:hallvors]
	Comment 6 • 8 years ago

To test this in a more controlled environment, use a local instance of https://github.com/OgarProject/Ogar and load agar.io?ip=127.0.0.1: and the port Ogar is listening on. Running commands like addbot on the server helps control the parameters of the game and the load on the rendering engine.

For a game like agar.io avoiding jank is very important.. I also think it's a question of GC timing/duration, so tweaking is better left to experts, but if there's any more analysis or logging I can help with..

	u279076
	Comment 7 • 8 years ago

Can someone please retest this with the latest Firefox Nightly? If it's still janky, please capture a performance profile and GC profile using the built in Developer Tools. If this is GC related then it doesn't belong in Graphics.

	AEK
	Comment 8 • 8 years ago

i captured a profile from latest Nightly.

	Jennifer Horner
	Comment 9 • 7 years ago

I have tested this with e10 enabled. http://bagario.net running well

	x0a.cake
	Comment 10 • 7 years ago

Slither.io also plays very choppily in Firefox 56.0a1 (2017-07-30) (64-bit nightly build). Plays very well in Chrome. It becomes more exaggerated on lower mid-end laptops (I use a HP Pavillion g7-1277dx with AMD 3530MX processor), especially in linux.

Sluggish canvas rendering is one of the last things keeping me from using Firefox full-time, aside from that it has pretty much caught up to chrome.