Bug 514261

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