Storing participant program in execdir after judging is complete

Hello

We run an instance of domjudge for our university courses, which has a lot of submissions (the judging run table has almost a million rows now).

I was exploring ways to reduce the disk usage of the judge, and I found that in the directory for every judging run, we store a copy of the executable under execdir under every testcase. Each executable is > 1 MB, and when this multiplies with number of test cases * number of judgings, this becomes very large in our use case.

Is there a reason why the executables are stored after judging is complete?

Thank you Parth Mittal