Performance issue for using List in JNI

[pluris]

I was using ros2 java and noticed that the performance was very slow in List.

When communicating with ros2 native, there is a serious performance difference in ros2java side.
So, I compared the performance by creating a Android JNI project.

• Array TIME : 17.532115(ms)
• List TIME : 1419.957922(ms)

How about using Array instead of List?
The usability is not good, but the difference in performance is significant, so I suggest.

Need some more modifications, but to me it also has an improved code.

[jacobperron]

We have a fix #165 that will land on main as we start porting changes from our fork.

[pluris]

@jacobperron I'm sorry. I see too late because didn't follow up this. I think #165 is a great job.