"Just as you can't add quality to your code just before shipping, seldom can you significantly improve performance without dramatic rewriting" That's total bul

"Just as you can't add quality to your code just before shipping, seldom can you significantly improve performance without dramatic rewriting" That's total bullshit. I've seen massive improvements from just a few key optimisations on very large code bases. Q: "When is it a mature time to start to consider performance, however?" A: When you have problems due to slow performance. The "premature optimisation is the root of all evil" catchcry is basically the same as "don't solve problems you don't have".