Bad performance while idle

[bdcomp]

Using the just released about:performance I discovered that Private Tab is slowing down my Firefox while idle: "Private Tab seems to have slown down Firefox very often. When this happens, the slowdown is generally noticeable" Impact on framerate: 0 high-impacts, 309 medium-impact. CPU usage: 2% (total 2903704ms). System usage: 1% (total 136975ms). Blocking process calls: 0% (total 0ms). Measure start: 2699 seconds ago.

Private Tab 0.1.9.1 Firefox 47 Kubuntu 16.04 64bit

[anewuser]

You had to go to about:performance to learn that there's a noticeable impact on your computer? :) I've been using Private Tab extensively basically every day for years, and it never hurt my Firefox performance. Please close this issue if you can't provide a detailed way to reproduce a slowdown (how many tabs you had open and for how long, what sites you had in private tabs etc.).

about:performance isn't too reliable yet.

[bdcomp]

@anewuser I just reproduced it again - you should open a new private tab and close it after several seconds. No need even to load any page. Later, Impact on framerate, CPU usage and System usage continue to grow, like there is some leak.

After only 1 opened and closed private tab (as described above): Full name: privateTab@infocatcher. Impact on framerate: 26 high-impacts, 87 medium-impact (16 alerts). CPU usage: 1% (total 1005210ms). System usage: 1% (total 65183ms). Blocking process calls: 0% (total 0ms). Measure start: 619 seconds ago.

Private Tab 0.1.9.1 Firefox 48 Kubuntu 16.04 64bit

[anewuser]

I kept toggling a tab with the website of a newspaper open into/off the private mode, and the report for Private Tab CPU usage didn't go up higher than 1% (which is barely anything and just means that it's working).

I don't get any framerate impact alert either. I believe that this may be related to a problem with your graphics card. Disable hardware acceleration on about:preferences#advanced and check if that improves your performance.

[bdcomp]

Features Compositing: Basic Asynchronous Pan/Zoom: none WebGL Renderer: X.Org -- Gallium 0.4 on AMD ARUBA (DRM 2.43.0, LLVM 3.8.0) Hardware H264 Decoding: No GPU #1 Active: Yes Description: X.Org -- Gallium 0.4 on AMD ARUBA (DRM 2.43.0, LLVM 3.8.0) Vendor ID: X.Org Device ID: Gallium 0.4 on AMD ARUBA (DRM 2.43.0, LLVM 3.8.0) Driver Version: 3.0 Mesa 11.2.0

Diagnostics AzureCanvasAccelerated: 0 AzureCanvasBackend: skia AzureContentBackend: cairo AzureFallbackCanvasBackend: none CairoUseXRender: 0

I am without hardware acceleration.

[anewuser]

I've seen that you've also created other reports on other Github repositories about this, and that even simpler extensions like Undo Closed Tabs will throw medium-impact framerate alerts to you.

You will need to investigate this problem with the users and developers of your Linux distribution, or some other forum dedicated to graphical problems. Maybe there's another driver you can use. Individual extension developers can't help you.

Since this isn't a Private Tab bug, please close this issue.