Opened 10 years ago
#13731 new defect
High CPU load when smooth-scrolling
| Reported by: | 00prometheus | Owned by: | |
|---|---|---|---|
| Component: | other | Version: | VirtualBox 4.3.20 |
| Keywords: | scrolling high-cpu | Cc: | |
| Guest type: | Linux | Host type: | Windows |
Description
I have noticed that when smooth-scrolling in either Firefox or Chrome, either by continuously running the mouse wheel, or by mid-click to activate auto-scroll and then moving the cursor slightly to slowly start scrolling, I get very high CPU load. At usual reading pace I can often get 70-80% CPU, slightly less when I scroll slower. This surprises me, since scrolling really shouldn't be a CPU intensive task! Under the Windows host, smooth scrolling never takes any CPU at all. Also, the Linux guest feels a bit more sluggish when scrolling compared to the Windows host. I am running Compiz, and 3D is generally working well (if using the 3D-box desktop, and it rotates nicely).
It is a bit of a bother, since this significantly reduces battery time: When just browsing the web, I scroll while reading, and this usually loads the CPU high enough to spin up the fan. Obviously, all that heat is a battery drain!
I am using a dual-boot Windows 8.1 and Windows 7 host with an Ubuntu 14.04 LTS guest on an ASUS 550JV laptop (Core I7-4700HQ, 16GB RAM and nVidia GT-750M). I have seen this on Virtualbox 4.3.12 (with guest additions 4.3.14) and on 4.3.20 (with guest additions 4.3.20). Virtualbox has one core and 6GB RAM. 3D in general is working well, as mentioned.
