Ubuntu 14.04 LTS 32-bit vs. 64-bit Performance
Written by Michael Larabel in Operating Systems on 9 May 2014 at 12:00 AM EDT. Page 3 of 4. 10 Comments.
For different Linux graphics drivers there may be more benefits out of 64-bit Linux, but for this Intel HD Graphics testing on Mesa 10.1 with Linux 3.13 there wasn't much change for the gaming tests.
The x264 video encoding performance was 13% faster in using the 64-bit version.
The time needed to build the Linux kernel was about the same between the 32-bit and 64-bit versions.