A small fun Python puzzle

[Dave Aitel <dave () immunityinc com>]

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This is part of our smb file putter. With small files it works great. 
With larger files, it uses 100% of the CPU and takes forever. Can anyone 
spot why? (Answer forthcoming, of course)

~        while data!="":
~            data_to_send=data[:1024]
~            success, results=smb_writex(self.s,self.fid,self.uid, 
self.tid,self.pid,data_to_send,offset)
~            offset+=len(data_to_send) #nt4 needs the offset to be 
calculated correctly on a named pipe
~            #for a given DCE call - oddly, 2000 and above don't care.

~            if not success:
~                devlog("msrpc", "Error while writex-ing")
~                #close request
~                self.fileclose()
~                return 0
~            #we wrote up to 1024 bytes...
~            data=data[1024:]

- -dave
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