Tag Memory Allocation

Core Java, Performance

BigDecimal Is Correct, But Expensive: How High Performance Systems Store Money

BigDecimal is a life saver when it comes to financial applications. If you are doing lots of decimal math where correctness is non negotiable, things like taxes, interest, and FX conversions, BigDecimal gives you clear guarantees around decimal behavior, correctness,…

Lobe Serge
March 7, 2026

Core Java, Collection

Stop Guessing: When new ArrayList<>(capacity) Actually Matters

I am sure you have written this in your Java code: List<Type> list = new ArrayList<>(); Countless times, I will say. That is normal. ArrayList is one of the most popular data structures in Java and in most situations, this…

Lobe Serge
February 12, 2026

Tag Memory Allocation

BigDecimal Is Correct, But Expensive: How High Performance Systems Store Money

Stop Guessing: When new ArrayList<>(capacity) Actually Matters

Saving 30% Heap Without Changing Code: String Deduplication vs. Interning

Escape Analysis in HotSpot: When new Object() Doesn’t Actually Create an Object

Stop Storing Flat Data Like Objects: Why int[] Beats Integer[] in Java

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BigDecimal Is Correct, But Expensive: How High Performance Systems Store Money

Stop Guessing: When new ArrayList<>(capacity) Actually Matters

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Saving 30% Heap Without Changing Code: String Deduplication vs. Interning

Escape Analysis in HotSpot: When new Object() Doesn’t Actually Create an Object

Stop Storing Flat Data Like Objects: Why int[] Beats Integer[] in Java