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Asked: 2026-05-14T01:23:06+00:00

What is the memory and performance usage compared to creating a object with only

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What is the memory and performance usage compared to creating a object with only a constructor?

The usage here is in creating a Set<Object> or List<Object> that may contain million plus entries and I am concerned with the overhead of using Bloch’s Builder Pattern. I have used it in the past, but never in this large of a scope.

Reference: Item 2: Consider a builder when faced with many constructor parameters, reprinted in Creating and Destroying Java Objects: Part 1, excerpted from Effective Java Second Edition by Joshua Bloch.

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  1. Editorial Team

    You have the additional Builder-object, that is discarded after the creation of the object. So you may have some impact on memory-usage and speed. But the Java-VM does optimize very strongly, especially the Server-VM (java -server), so the VM may optimize away the builder completely. So my suggestion is you should measure the real impact (as always if you care about performance) and decide if the impact is too big.

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