Is Java slow when creating Objects?

java, new-operator, object-construction, oop, performance

Solution

Very big question. Generally speaking, it depends from the object class definition and by the amount of work required to construct object.

Some issue:

- avoid finalize method,

- tune memory and GC in order to avoid excessive GC activity,

- avoid big work during constructor,

- do not use syncronization call during object construction,

- use Weak references

these issues solved my problem.

See also http://oreilly.com/catalog/javapt/chapter/ch04.html

Finally let me suggest you the (deprecated) Object Pool pattern or reuse objects.

Concluding, no, generally speaking, java object creation is not slow

Problem

In my current project (OpenGL Voxel Engine) I have a serious issue when generating models. I have a very object oriented structure, meaning that even single parameters of my vertices are `Object`s. This way I am creating about 75000 `Object`s for 750 voxels in about 5 seconds. Is Java really this slow when allocating new `Object`s or do I miss a big failure somewhere in my code?

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