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On 03/13/2012 05:50 AM, Peng Xiao -X (penxiao - Digital China at
Cisco) wrote:
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<p class="MsoNormal"><span lang="EN-US">Hi experts,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I wrote a TCP client
program used twisted to receive lots of data from the server
and decode them for analysis.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">But the efficiency is
ugly.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I used<b><span
style="color:red"> “profile” and “pstats” </span></b>to
analysis and found <b><span style="color:red">selectreactor.py</span></b>
is time consuming.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">what is <b><span
style="color:red">selectreactor.py</span></b> used for?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">How can I improve that?
<o:p></o:p></span></p>
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selectreactor is the core event loop; it waits for events to happen
and calls other code.<br>
<br>
In general, if you have many connections (hundreds or thousands)
switching to the IOCP reactor on Windows, epoll on Linux, or poll on
other Unix platforms may help (next release will also have kqueue
support for FreeBSD). Running your application with PyPy may also
help.<br>
<br>
It may also be, though, that your program is taking a long time
because it's waiting for data to arrive, for example, and that won't
show up in a profile because it has nothing to do with CPU time.<br>
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