Am 10.08.19 um 14:40 schrieb Carlo Arenas: > On Sat, Aug 10, 2019 at 12:57 AM René Scharfe <l.s.r@xxxxxx> wrote: >> I don't understand why my performance is lower by factor 2.5 than yours >> for all perl regex tests except 7820.15 (your 7820.4), where my system >> is two times faster. Debian Testing, GCC 9.1.0, i5-9600K, 16GB RAM. > > interesting; did you also see at most 100% of one CPU being used? For 7820.15 yes -- 100% of a single core, the rest idling. The other tests had only brief sequential phases, if at all, and used all cores. René