juniorOptimisation
What is optimization in software engineering?
Updated May 17, 2026
Short answer
Optimization is the process of improving system performance by reducing resource usage like time, memory, or compute.
Deep explanation
Optimization focuses on improving efficiency without changing the correctness of the program. It involves analyzing bottlenecks, selecting better algorithms, reducing redundant computations, and improving system design. It is applied at code, database, and architecture levels.
Real-world example
Replacing nested loops with hash maps in search systems to reduce response time.
Common mistakes
- Optimizing too early without profiling leads to unnecessary complexity.
Follow-up questions
- When should you start optimizing code?
- Is optimization always about speed?