How to fix severe frame stuttering and script execution latency during custom game utility runs?

[marcussorr434]

Hey everyone,
I’ve been trying to troubleshoot an annoying performance issue on my PC rig while testing custom game utilities and automated execution setups, and I ran into similar runtime latency while analyzing dynamic script execution behavior on here. Whenever complex multi-threaded execution loops or long-running async background routines are initialized in the wrapper thread, the primary process stutters heavily, dropping frames in real time and causing random input processing delays. I initially assumed it was an issue with local GPU memory leaks, background overlay conflicts from third-party tools, or aggressive CPU thread throttling, but even after clearing browser and app caches, adjusting process priorities in task manager, and testing across fresh device profiles, the execution lag and UI freezing persist during heavy routine passes. Has anyone in the gaming community encountered similar main-thread stutters or execution latency when running dynamic background scripts alongside game client processes, and what optimization or thread isolation tweaks would you suggest to keep performance smooth?