python性能测定02

方法01：

##利用python的标准库cProfile

##nova/api/openstack/wsgi.py

import time
import cProfile, pstats, StringIO
from oslo_middleware import request_id

pr = cProfile.Profile()
pr.enable()
start_time = time.time()

doSomething()

end_time = time.time()
pr.disable()
s = StringIO.StringIO()
sortby = ‘cumulative‘
ps = pstats.Stats(pr, stream=s).sort_stats(sortby)
ps.print_stats()
req_id = request.environ.get(request_id.ENV_REQUEST_ID)
p = open("/tmp/test/" + str(req_id),‘w‘)
p.write(s.getvalue())
p.close()