[issue3766] socket.socket.recv broken (unbearably slow)
Thorben Krueger
report at bugs.python.org
Wed Sep 10 09:26:02 CEST 2008
Thorben Krueger <thkruege at uos.de> added the comment:
As promised, here is the profiler output for a Mac (thanks Stefan). The
problem does NOT occur here, which should help greatly in tracking down
the cause in the socket library. Anyone into this?
$ python runme.py
500 packets @ 2 tokens each (500 very short lists)
0.0814669132233
14508 function calls in 0.082 CPU seconds
Ordered by: internal time
ncalls tottime percall cumtime percall filename:lineno(function)
1500 0.048 0.000 0.048 0.000 {method 'recv' of
'_socket.socket' objects}
1500 0.015 0.000 0.015 0.000 <string>:1(sendall)
1500 0.003 0.000 0.021 0.000 Client.py:8(send_int)
1500 0.003 0.000 0.053 0.000 Client.py:16(read_int)
500 0.003 0.000 0.057 0.000 Client.py:19(read_int_list)
1500 0.002 0.000 0.002 0.000 struct.py:77(unpack)
1500 0.002 0.000 0.002 0.000 struct.py:54(pack)
500 0.001 0.000 0.022 0.000 Client.py:11(send_int_list)
1 0.001 0.001 0.082 0.082 runme.py:12(bench)
1000 0.001 0.000 0.001 0.000 {method 'insert' of 'list'
objects}
1001 0.001 0.000 0.001 0.000 {range}
500 0.001 0.000 0.080 0.000 Client.py:28(spam)
1500 0.000 0.000 0.000 0.000 {method 'unpack' of
'Struct' objects}
501 0.000 0.000 0.000 0.000 {len}
1 packet @ 50000 tokens (1 very long list)
5.20953297615
400018 function calls in 5.210 CPU seconds
Ordered by: internal time
ncalls tottime percall cumtime percall filename:lineno(function)
50001 2.267 0.000 2.267 0.000 <string>:1(sendall)
50001 1.263 0.000 1.263 0.000 {method 'recv' of
'_socket.socket' objects}
50000 1.112 0.000 1.112 0.000 {method 'insert' of 'list'
objects}
50001 0.137 0.000 1.490 0.000 Client.py:16(read_int)
50001 0.134 0.000 2.478 0.000 Client.py:8(send_int)
1 0.082 0.082 2.685 2.685 Client.py:19(read_int_list)
50001 0.077 0.000 0.077 0.000 struct.py:54(pack)
50001 0.073 0.000 0.089 0.000 struct.py:77(unpack)
1 0.044 0.044 2.522 2.522 Client.py:11(send_int_list)
50001 0.016 0.000 0.016 0.000 {method 'unpack' of
'Struct' objects}
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<http://bugs.python.org/issue3766>
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