I've seen it mentioned here before, that the performance hit taken when upgrading to 10.5 from 10.4, is marginal. In my personal experience, having compared the two recently, 10.4 is ENORMOUSLY quicker, and appears to have lower CPU overhead than 10.5. This can be observed when performing a CPU intensive task, such as using a script heavy website.
Am I mistaken?
Am I mistaken?