Performance of a mocking framework

Few days ago came in my mind the idea to measure the performance of the mocking framework used here. I was curious how it affects our unit tests' running time and how can we squeeze out some extra performance from the build agents. I created a basic measurement code with low amount of iteration steps (to imitate a medium sized codebase) and recognized we are in the world of nanoseconds. From this point all the measurement is just about some competition between the frameworks and no reason to switch between them just to make the test run faster.

I tested only three common cases:

• Mock creation
• Mock interaction
• Mock verification

Test environment: Core i5 750@2.67GHz

Here are the results



Conclusion:
Easymock dramatically overperforms Mockito even it needs a bit more coding in some cases, but the difference is not changing the game. You can use any of them without worrying for their performance

The code also available on GitHub