[rakeshpai]

Link about v8 performance cost of try/catch.

http://floitsch.blogspot.in/2012/03/optimizing-for-v8-introd... "It turns out that some constructs are not yet supported by Crankshaft. In particular, try/catch turns off all optimizations in a function."

[ef4]

Yes, but only in the function where the try catch appears. Whatever you call from there, even if it's protected within the stack of the try/catch statement, is still optimizable.

So entering a try/catch once and then doing all your work inside it is still fast. What's expensive is constantly entering new try/catch contexts.