SEGPROD: Time of same code varying by ~1 sec for different submissions.

I submitted a solution twice (within 5 minutes or so) without making any changes and the difference in time was almost a sec. (2.96 Vs 2.18). Such a variation is pretty large considering the time limit of SEGPROD is very strict and it is hard to know if a change is bringing any improvement to the solution. I request @admin to look into this and if possible extend the time limit of the problem by 1 or 2 secs as it is too tight.