How to Optimize Your Java Code for Speed

Want to make your Java code run faster? Here are five simple ways to optimize for speed.

1. Use StringBuilder instead of regular string concatenation in loops. It’s way more efficient.

2. Minimize object creation. Reuse instances where possible to reduce memory load and garbage collection overhead.

3. Use streams wisely. They're powerful—but in performance-critical code, plain loops are sometimes faster.

4. Cache expensive results. If your method repeats the same calculation, save the result and reuse it.

5. Profile your code. Use tools like VisualVM or JMH to find the real bottlenecks—don’t just guess.

Small changes can deliver big wins in performance. Write clean, test often, and optimize with intent.

Видео How to Optimize Your Java Code for Speed канала Tech Developer