How to optimize application performance — a hands on tutorial
Performance Optimization: Measure Before You Optimize
Donald Knuth's famous warning-"premature optimization is the root of all evil"-boils down to one principle: measure before optimizing. Without real-world evidence that your application is too slow, you're guessing where to fix problems, and guesses create the wrong solutions.
The Golden Rule: Establish a Baseline First
Before touching any code, establish baseline metrics:









