Revisiting Knuth's "Premature Optimization" Paper
10 months ago
- #programming
- #performance
- #optimization
- Knuth's famous quote 'premature optimization is the root of all evil' is often misinterpreted.
- The original paper discusses the use of 'goto' statements and performance trade-offs in structured programming.
- Knuth emphasizes that small optimizations (e.g., loop unrolling) are worthwhile if they are in critical code sections.
- Benchmarking is essential to identify which parts of a program truly benefit from optimization.
- Modern compilers do not always optimize effectively, sometimes requiring manual intervention (e.g., assembly tweaks).
- Using well-optimized library functions (e.g., STL, fast hash tables) is often better than manual micro-optimizations.
- A 10% performance improvement can be significant, especially in frequently used library functions.