i'm not sure if GRINDER is still best tool so far JAVA API performance testing tool. If anyone is using it, could you share your feedback? tx
I have used JMeter and Grinder and can tell you that grinder is awesome . JMeter is also great . Not sure why you will be testing a JAVA API. Grinder is more like a programmers performance tester tool. Once you get a hang of it you will not lean away from it . The only complex part could be the recorded scripts that grinder generates .The initial recorded script can get you overwhelmed and you might think what have i picked up . But actually it just a step by step script and easy to modify as per your needs. Any performance testing will have only these steps .
My vote is for grinder specially for complicated scenarios.