[Issue 9584] Exceptions in D are ludicrously slow (far worse than Java)

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=9584



--- Comment #3 from Don <clugdbug at yahoo.com.au> 2013-02-25 03:49:32 PST ---
Exception handling is not intrinsically very slow. Basically there are two
function calls per stack frame, each of which only executes a handful of
instructions. All of the data that is accessed lies on the stack, so it should
be in cache. On Windows, there are a few system calls during stack unwinding,
but they are also extremely quick.

But even so, I'm a bit suspicious of that Java code. Is it really throwing an
exception? If it contains any exception handling optimisations at all, it would
optimize the throw/catch away.

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