On 2015-07-05, Gordon Messmer gordon.messmer@gmail.com wrote:
On 07/05/2015 04:51 AM, Liam O'Toole wrote:
One practical difference I have seen is the improved performance of -Y over -X. I have long attributed that to the relaxation of security controls in the former case.
When and how did you measure that?
The -Y change was introduced in Fedora Core 3, in November 2004. The default was changed to ForwardX11Trusted=yes just a month or two later. I'm not sure -X and -Y ever behaved differently on Enterprise Linux or CentOS.
At this point, I don't think it's even possible to set ForwardX11Trusted=no any more. The X SECURITY extension was replaced with "X Access Control Extension" several years ago.
The perceived difference was a general impression on my part, and not measured scientifically. Moreover, it was formed years ago, and on a variety of Linux systems. I concede that it may well be obsolete.