trace parser understand inclusive and exclusive time

Hi all,

I am getting a performance issue from my custom code, on checking the trace for it this is what I see:

The inclusive time in my custom method is 15259.51 ms and exclusive time is 15070.69 ms. Also 1 thing I am not able to figure out is inside the custom code there is nothing which is taking this much time. This is the sit trace, and in dev the time is around 2-3 seconds. Has anyone faced this issue? Can anyone please help me understand this issue?

Thanks in advance