Intel has introduced FRED (Flexible Return and Event Delivery) with its new Panther Lake processors, a technology designed to significantly boost CPU performance in Linux environments. FRED enhances the efficiency of event transitions between different privilege levels—a critical component of the operating system kernel—thereby reducing latency during system calls. Early benchmark results have demonstrated substantial performance gains, particularly in applications that frequently switch between user and kernel modes. Despite being supported in the Linux kernel since 2024, FRED remains disabled by default on Panther Lake systems and requires manual activation via the 'fred=on' boot parameter, adding an extra configuration step for users.