On 10 Oct 2002, Neil Conway wrote: > Well, I'd assume any C library / compiler of half-decent quality on > any platform would provide assembly optimized versions of common > stdlib functions like memset(). > > While playing around with memset() on my machine (P4 running Linux, > glibc 2.2.5, GCC 3.2.1pre3), I found the following interesting > result. I used this simple benchmark (the same one I posted for the > earlier MemSet() thread on -hackers): >
[snip] > Compiled with '-DBUFFER_SIZE=256 -O2', I get the following results in > seconds: > > MemSet(): ~9.6 > memset(): ~19.5 > __builtin_memset(): ~10.00 I ran the same code. I do not understand the results you go. Here are mine, on an AMD Duron with GCC 3.2 and glibc-2.2.5. Results are: MemSet(): 14.758 sec memset(): 11.597 sec __buildin_memset(): 9.000 sec Who else wants to test? Gavin ---------------------------(end of broadcast)--------------------------- TIP 5: Have you checked our extensive FAQ? http://www.postgresql.org/users-lounge/docs/faq.html
