Create a benchmark test for various scenarios to help ensure mem usage doesn't increase too much in future releases

[ankur22]

What

Add a benchmark test to ensure that changes to the codebase do not introduce memory leaks.

Why

We found several memory leaks in the past releases (#1431, #1488, and #1493). These issues could have quite easily been spotted earlier and fixed quickly, avoiding several days worth of debugging and profiling. To mitigate the risk of this occurring again we want to create a benchmark test that will ensure that the memory usage stays constant between changes to the codebase.