id	summary	reporter	owner	description	type	status	component	version	resolution	keywords	cc	guest	host
13260	Virtual box has become painfully slow (Windows guest on linux host)	teo8976		"I have a Windows 7 64bit guest on an Ubuntu 14.04 host with VB 4.3.14 on an intel core i7 3632QM (this is a quadcore with 2.2GHz)

Simply moving around a window on the guest is panifully slow.

I used to have the exact same version of windows guest installed from the very same installation CD on VirtualBox 3.x on a FOUR YEAR OLD computer wit Ubuntu 12.x and the guest ran much faster than it does now on the newer hardware with newer VB.

Actually I remember it becoming this slow after some upgrade of VB on the old computer, too.

Something has definitely been screwed up somewhere between 3.x and 4.y that has degraded performance to an unusable slowness.

The host suffers too. Right now while the guest is practically idle and about 2% CPU consumption is reported within the guest, on the host the VirtualBox process is consuming 147% CPU (i.e. a core and a half) and afefcting the host responsiveness.

It's surprising to notice such a degeneration after a couple-of-years newer hardware and VB, with teh exact same guest OS (meaning a clean install of the same installation CD). Something must be badly wrong.

Is there anything I can do to figure out where the bottleneck is?"	defect	closed	other	VirtualBox 4.3.14	obsolete			Windows	Linux