Oracle VirtualBox 4.2 Virtualization Benchmarks
Written by Michael Larabel in Software on 26 August 2012. Page 3 of 3. 6 Comments

There does appear to be a serious regression somewhere when it comes to the ability of VirtualBox for building a vanilla Linux kernel. Building the vanilla Linux 3.1 kernel took significantly longer under VirtualBox 4.2 RC1 than when using the current stable release (v4.1.20).

There are some small performance improvements in some of the tests, such as Smallpt, but that test for instance still has significant overhead compared to the raw/bare-metal performance on the multi-core Intel Linux system.

If you were hoping for some performance breakthroughs with Oracle VirtualBox 4.2, it sadly doesn't look that way, at least when using an Intel Linux system and an Ubuntu 12.04 LTS guest. A few tests improved by small amounts with VirtualBox 4.2 RC1 over the 4.1.20 stable release, but there weren't any clear trends and there were also some performance regressions (namely with the build-linux-kernel test profile). More benchmarks of VirtualBox will be conducted when the 4.2 release is officially available.

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Michael Larabel is the principal author of and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and automated benchmarking software. He can be followed via Twitter or contacted via

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