Java Performance Optimization: Fixing 8 Common Anti-Patterns to Reduce Processing Time by 80%
By
siegers
Hot, fresh, and worth queueing round the block for.
Summary
The article presents a case study of Java performance optimization where fixing common anti-patterns dramatically improved application performance. The author's order-processing app went from 1,198ms elapsed time to 239ms, increased throughput from 85,000 to 419,000 orders per second, reduced heap usage from over 1GB to 139MB, and decreased garbage collection pauses from 19 to 4. The article identifies eight Java anti-patterns that compile fine and pass code review but silently drain CPU and balloon heap, providing benchmarks and code fixes for each pattern.
Key quotes
· 5 pulledBefore any changes: 1,198ms elapsed time, 85,000 orders per second, peak heap sitting at just over 1GB, 19 GC pauses.
After: 239ms. 419,000 orders per second. 139MB heap. 4 GC pauses.
Same app. Same tests. Same JDK. No architectural changes.
Fixing common Java anti-patterns took an app from 1,198ms to 239ms.
Eight patterns that compile fine and pass code review but silently drain CPU and balloon heap, with benchmarks and code fixes for each.
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