What to Remember

(Antepenultimate slide)

1. Look at the big picture first - think about the project, not the program

2. It's hard to guess what part of the program matters, so use tools

3. 90% of the runtime is accounted for by 10% of the code

4. The speed of the other 90% of the code hardly matters at all...

   • ...so don't waste your time on it

5. The Benchmark module is good for answering questions that aren't worth asking

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