[Patrick]

I don't think so, I think the default natives and switch in SA-MP is much faster than this include, I've made some speed-test base on my computer, and all the results I got is listed down below

Result

pawn Код:

//Test 1
[14:06:37] With xskins.inc took 83 ms
[14:06:37] Without xskins.inc took 63 ms

//Test 2
[14:08:56] With xskins.inc took 211 ms
[14:08:56] Without xskins.inc took 186 ms

//Test 3
[14:08:59] With xskins.inc took 132 ms
[14:08:59] Without xskins.inc took 91 ms

//Test 4
[14:09:08] With xskins.inc took 156 ms
[14:09:08] Without xskins.inc took 87 ms

The result are based on this code: http://pastebin.com/wngv8Lkr