I notice when you submit a correct solution for a problem multiple times (same code implementation), the runtime in milli-seconds is non-deterministic. I'm not sure if this is a consequence of other user submissions taking resources on the back-end or something else.

What are others thoughts on this? Can anyone share insight as to how the runtime is calculated? I ask this question due to seeing my same solution increase by 10 ms at times.

Thank you in advance.