and if I don't touch it, after a while it'll work again!

but it always freeze eventually... so strange behaviour! any idea about the possible reasons?

Thank you, Marco

PS: the goal is to draw a simple math expression: i thought in this case JS would have been more efficient than max, but I read so many people saying that Math.pow() is highly inefficient, so I may reconsider using it.

I attach the patch (showing the max equivalent too) and the js file. cheers :)