On 2/7/14, 8:40 AM, Dmitry Olshansky wrote:
07-Feb-2014 06:44, Walter Bright пишет:
On 2/6/2014 2:15 PM, Brad Anderson wrote:
Personally I don't think bad user input qualifies as an exceptional
case because
it's expected to happen and the program is expected to handle it (and
let the
user know) when it does. That's just a matter of taste though.
It's not a matter of taste. If your input is subject to a DoS attack,
don't put exceptions in the control flow.
Meh. If exceptions are such a liability we'd better make them (much)
faster.
One simple idea is to statically allocate the same exception and rethrow
it over and over. After all there's no guarantee a distinct exception is
thrown every time, and the approach is still memory safe (though it
might surprise the programmer who saves a reference to an old exception).
Andrei
