Dear Alexander, > Good point. Also could you please add latency metrics, I see that your testing > framework already exposes the '--latency' flag. here are latency metrics (still on i5-4590): | gcc-9 | gcc-10 | gcc-11 | ------------|-------|--------|--------| -std=c99 | 70.8 | 70.3 | 70.2 | -std=gnu18 | 59.5 | 59.5 | 59.5 | It thus seems the issue only appears for the reciprocal throughput. Best regards, Paul