NMS function taking much execution time than expected

[deepak1212194]

Hi, I was trying executing this CPP Code on my local machine but it is very slower than expected.
System configuration: "Dell XPS" machine :
CPU : Intel(R) Core(TM) i7-10750H CPU @ 2.60GHz with 12 cores
RAM : 32 GB
GPU: 4GB of "NVIDIA GTX 1650ti"
I run this code with inputs from yoloV5 (25,200 bounding boxes for each frame) but the code keeps on running. However when I decrease the bounding boxes, the code run but it was very slow.

For 200 Bounding boxes sample input : 1.73809 Sec

For 100 Bounding boxes sample input : 0.398812 Sec

Help me to solve this issue!!!