ErrUchIsDown

In the Min and Max task, I get the following error:

ErrUchIsDown: You process have been killed because of using too much resources

I can't see why my code would be particularly resource intensive. I'm sure I've used more resource intensive code on Checkio previously, so I'm guessing it's to do with the recent upgrade.

I'll post my code if requested, but I haven't done so yet because it would reveal my answer to the task and therefore possibly spoil it for others.