SUMMARY From a some days, on one of the my computer, I observed a dramatic loss of performances in the applications launched from konsole. the problem appears only on the machine mentioned in this bug reports, with my laptop I've no problems. The problem appears with bash or fish shells. STEPS TO REPRODUCE Example: I used stream benchmark from: https://www.cs.virginia.edu/stream/ download directly from: https://www.cs.virginia.edu/stream/FTP/Code/stream.c compiled with: gcc stream.c -o stream -fopenmp -O2 -DSTREAM_ARRAY_SIZE=100000000 OBSERVED RESULT This is the result of the stream benchmark if I launch the executable from konsole: ------------------------------------------------------------- Function Best Rate MB/s Avg time Min time Max time Copy: 6342.9 0.268758 0.252252 0.319046 Scale: 6184.0 0.265170 0.258734 0.269353 Add: 6698.0 0.364608 0.358317 0.378277 Triad: 6844.6 0.364596 0.350642 0.380089 ------------------------------------------------------------- Solution Validates: avg error less than 1.000000e-13 on all three arrays ------------------------------------------------------------- The performance is significantly below the expected performance for this machine. Note: this application is a memory bandwidth benchmark. But the problems appears also with others applications, like compilation .... EXPECTED RESULT This is the expected result from my machine (by using the XFCE terminal, or any other terminal): ------------------------------------------------------------- Function Best Rate MB/s Avg time Min time Max time Copy: 74815.6 0.021462 0.021386 0.021570 Scale: 52472.7 0.030675 0.030492 0.031344 Add: 57675.5 0.041826 0.041612 0.042759 Triad: 57436.9 0.042027 0.041785 0.042953 ------------------------------------------------------------- Solution Validates: avg error less than 1.000000e-13 on all three arrays ------------------------------------------------------------- SOFTWARE/OS VERSIONS Operating System: Arch Linux KDE Plasma Version: 6.5.4 KDE Frameworks Version: 6.21.0 Qt Version: 6.10.1 Kernel Version: 6.18.3-arch1-1 (64-bit) Graphics Platform: Wayland Processors: 36 × Intel® Core™ i9-10980XE CPU @ 3.00GHz Memory: 128 GiB of RAM (125.5 GiB usable) Graphics Processor: NVIDIA GeForce RTX 2060 konsole 25.12.0-1