http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59061
--- Comment #19 from Joost VandeVondele <Joost.VandeVondele at mat dot ethz.ch> --- (In reply to Kostya Serebryany from comment #18) > I don't think we've measured pure-lsan slowdown, but I expect it to be small. > asan/lsan bring in a different allocator (malloc/free). > We tried to make it very fast and our measurements show that's it is close > to > tcmalloc performance (but a bit more greedy in memory). > It also performs stack unwind on every malloc, so on malloc-intensive apps > you may see some small slowdown. I our simulation code, it looks like the overhead for leak checking is about 20%. I haven't done very careful measurements yet, since this is more or less what we're willing to pay to integrate the (very useful) feature in our testing setup.
