how to know what requests are super slow in your uswgi server

uswgi_msecs.py

import sys

with open(sys.argv[1]) as f:
    content = f.readlines()

for line in content:
    parts = line.split("bytes in ")

    if len(parts)>1:
        msecs = parts[1].split(" msecs ")[0]
        msecs = int(msecs)
        if msecs >= int(sys.argv[2]) and msecs <= int(sys.argv[3]):
            print line
            
            
# give me the request in the log where response is generated btw 30 and 60 secs
# python uswgi_msecs.py uwsgi.log 30000 60000