In fact, 13% sounds a lot, even 5% should be generally a good outcome.
the main point for me of using a recent code base and recent building tools is not only FPS, I also trust them more for having stability and smoothness in operation (plus perhaps speed ups in FPS-unrelated parts of the program, e.g. map loading); recent versions also work on bug fixing (not only on features; well, depending on the people or project the ratio may change) and new systems in hardware may require new software. Sure a very new version of a tool or code base could have its problems but I think the alterations are probably worth the risk - and one could revert to a recent version working or tweak it to work anyway. In the case of ioquake3 this is very prominent because - regardless of using latest building tools - the edits on the source code since ioUrT was released are immense in quantity; and they are generally good coders in my opinion there - though granted they don't work on it 24/7 apparently. it takes its time. (Plus they seem to be - and officially - more inclined to bug fixing and careful - non mod-interrupting - feature adding than to blindly feature addition.)
This post has been edited by mitsubishi: 07 November 2009 - 06:01 PM