java - CPU Intensive Calculation Examples?

Question

I need a few easily implementable single cpu and memory intensive calculations that I can write in java for a test thread scheduler.

They should be slightly time consuming, but more importantly resource consuming.

Any ideas?

Answer 1

A few easy examples of CPU-intensive tasks:

• searching for prime numbers (involves lots of BigInteger divisions)
• calculating large factorials e.g. 2000! ((involves lots of BigInteger multiplications)
• many Math.tan() calculations (this is interesting because Math.tan is native, so you're using two call stacks: one for Java calls, the other for C calls.)