Opencv 4.10 too slow

I am using the KCF (Kernelized Correlation Filters) tracker, but there is a noticeable delay in the camera feed, even though the CPU usage is reported to be low (around 62% idle). I am working with OpenCV 4.10.0 on a Jetson NX. Has anyone else encountered this issue? If so, can you suggest a solution to minimize the delay?

top - 21:36:51 up 47 min, 1 user, load average: 1.78, 1.48, 1.93
Tasks: 274 total, 1 running, 273 sleeping, 0 stopped, 0 zombie
%Cpu0 : 17.7 us, 19.3 sy, 0.0 ni, 60.0 id, 0.0 wa, 2.0 hi, 1.0 si, 0.0 st
%Cpu1 : 17.8 us, 11.4 sy, 0.0 ni, 69.8 id, 0.0 wa, 0.7 hi, 0.3 si, 0.0 st
%Cpu2 : 19.1 us, 16.2 sy, 0.0 ni, 63.7 id, 0.0 wa, 0.7 hi, 0.3 si, 0.0 st
%Cpu3 : 19.2 us, 13.9 sy, 0.0 ni, 65.6 id, 0.3 wa, 1.0 hi, 0.0 si, 0.0 st
%Cpu4 : 16.3 us, 15.0 sy, 0.0 ni, 67.8 id, 0.3 wa, 0.7 hi, 0.0 si, 0.0 st
%Cpu5 : 17.3 us, 12.0 sy, 0.0 ni, 70.0 id, 0.0 wa, 0.7 hi, 0.0 si, 0.0 st
MiB Mem : 6833.6 total, 4010.2 free, 1737.8 used, 1085.7 buff/cache
MiB Swap: 11608.8 total, 11608.8 free, 0.0 used. 4780.3 avail Mem