CS2D
Scripts hudtxt performance
hudtxt performance
1 
Offline--1)
show:
parse('hudtxt2 1 1 "TEXT" 0 00 1 12')
hide:
parse('hudtxt2 1 1')
show:
parse('hudtxt2 1 1 "TEXT" 0 00 1 12')
--2)
show:
parse('hudtxt2 1 1 "TEXT" 0 00 1 12')
hide:
hudtxtalphafade(1, 1, 0, 0.0)
show:
hudtxtalphafade(1, 1, 0, 1.0)
you are disabling/enabling the text more often the text gets longer Strings* are huge (in comparison to numbers). Avoid sending strings frequently. Commands with less parameters mean less traffic in most cases (of course this is only true for commands which do stuff which needs to be synchronized with the server/other players)
image paths are strings too but CS2D creates a mapping table which allows to greatly reduce their size in most cases. This does not work for image paths with special tags though. So in general it's a good idea to keep file names and paths short. 
Quattro: Yes, same thing. It is much cheaper to set the alpha of images to 0 and back to something else instead of removing and re-creating them. VADemon: You are right in general but wrong in this particular case. CS2D checks the alpha value before rendering. Images with a very low alpha value are not rendered anymore and therefore do not take any GPU time. imagealpha
Whenever you know that you just want to hide an image and show it again later it's advisable to set alpha to 0 and back to a higher value later. Otherwise (if you don't plan to show the same image again) just use freeimage 1