marcinkowski
Personally, I wouldn't even bother with the Killed > 0 check, I'd just reset the variable to 0 regardless.
Of the two, though, the first one is better if you are going to add other subevents On start of layout, otherwise there is no real difference and is not something you should be wasting time on when there are so many other more productive things you could be doing to make your game better.
See: https://www.scirra.com/blog/83/optimisa ... -your-time