Hi Dave, Thanks a lot for the quick reply. Your suggestion below worked 😊.
Thanks, Matt From: Dave Watson <dade.wat...@gmail.com> Date: Monday, March 15, 2021 at 6:22 PM To: Matt Borges <matt.bor...@sap.com> Cc: "libunwind-devel@nongnu.org" <libunwind-devel@nongnu.org> Subject: Re: Slow libunwind performance with my build Probably a configure flag, try some combination of --disable-debug --disable-block-signals --disable-conservative-checks --enable-per-thread-cache On Mon, Mar 15, 2021 at 3:17 PM Borges, Matt <matt.bor...@sap.com<mailto:matt.bor...@sap.com>> wrote: Hi, Sorry if this gets sent twice... I grabbed the 1.5.0 source and built libunwind myself on a linux SUSE system. On this linux machine there already exists libunwind in /usr/lib64 but I want to build it myself. To build I’m running autogen.sh, then configure and finally make. When I run my test program which gets callstacks once a millisecond, I see that the libunwind I built takes 4 times longer than the one installed on the system. I’ve also tried adding -O2 -m64 to CFLAGS and CXXFLAGS but it doesn’t make a difference. Is there anything obvious in the above steps that would indicate why there is this huge difference in performance with the version I am building? For example, do I have to pass any options to autogeh.sh, configure, or make to perform an optimized production build? Thanks in advance, Matt -- -Dave
