On Sat, 17 Mar 2007, Morten Welinder wrote: > > > samples % app name symbol name > > 41527 15.6550 git strlen > > Almost 16% in strlen? Ugh! > > That's a lot of strings, or perhaps very long strings. Or a profiling bug. It's likely real, and the problem is likely lots of small strings. Each git tree entry is: "<octal mode> name\0" <20-byte sha1> so you do have a *lot* of strlen() calls when doing any tree parsing. And for some inexplicable reason, glibc thinks strings are long on average, so it has a fancy algorithm to do 8 bytes at a time and tries to do things aligned etc. The size of strlen() on x86-64 with glibc is 232 bytes. I'm not kidding. Linus - To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html