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> 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
