What does {method 'poll' of 'select.poll'…} mean in cprofile output?

I have a flask app that I’m trying to profile (I’m new to this). When I ran it, I had this result: 3327 function calls (3247 primitive calls) in 7.350 seconds Ordered by: cumulative time ncalls tottime percall cumtime percall filename:lineno(function) 7/1 0.000 0.000 7.350 7.350 {built-in method builtins.exec} 1 0.000 0.000 7.350 7.350 <string>:1(<module>)… Read More What does {method 'poll' of 'select.poll'…} mean in cprofile output?