High performance IO on non-blocking sockets
jeremy at zope.com
Fri Mar 14 17:38:15 CET 2003
On Fri, 2003-03-14 at 05:42, Troels Walsted Hansen wrote:
> Now for recv operations on non-blocking sockets. Assume that I want to read
> a known number of bytes (total_recv_size) from a socket and assemble the
> result as a Python string called self.data (again, think anywhere from 1 to
> hundreds of megabytes of data).
> Approach #1 (list+string.join based):
> self.data = 
> # following code runs when socket is read-ready
> recv_size = 64*1024 # for example
> data = self.socket.recv(recv_size)
> self.data = ''.join(self.data)
> All these three approaches have faults. #1 will cause memory fragmentation
> by allocating len(data) strings (in an unlikely worst case, recv() returns 1
> byte for each recv()).
What's the expected case?
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