I think at this point I should announce that this test is now closed
Thanks everyone who provided feedback.
It was testing the difference between a build with a global exception handler and a build without the global exception handler (_v1 was the trunk build, _v2 was my build).
I wasn't sure that it would make much difference, however The_Es first comment was 'v2 seems slightly faster', so I pursued a little further
(don't ya love subjective tests - in all fairness to The_E, maybe some caching had kicked in somewhere
)
For those who want technical information on how __try/__catch works in VS:
Kevin Frei: How much does Exception Handling cost, really?EDIT: Should have mentioned that in the instance of a C++ exception throwing function (like 'new') things could have been a little slower on the prologue and epilogue of functions, but I'm still unsure as to how much