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Re:Flickr: PHP4 vs PHP5 drop in CPU comparison by emmett on Friday May 08, 2009 @08:35PM (#600533)
Definitely not. If your boxes are pegged at 100%, you have no spare capacity!

The real question is, are you CPU constrained at peak capacity? And in the case of dynamic web apps, the answer is almost always yes. So CPU improvements are a huge deal. Double your CPU efficiency, double your server efficiency.

Re:Flickr: PHP4 vs PHP5 drop in CPU comparison by axod on Saturday May 09, 2009 @03:25AM (#600807)
Yes, I agree - in terms of extra capacity. But for your current users, they may see no difference.