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<p class=MsoNormal style='text-autospace:none'>Hello Guys,<o:p></o:p></p>
<p class=MsoNormal style='text-autospace:none'><o:p> </o:p></p>
<p class=MsoNormal style='text-autospace:none'>I’m looking for a little
advice on spawning a sub process to run a command line application for transferring
a file over Bluetooth. Now the spawned process runs from start to finish
exactly as I would expect it too, however its very slow. <o:p></o:p></p>
<p class=MsoNormal style='text-autospace:none'><o:p> </o:p></p>
<p class=MsoNormal style='text-autospace:none'>Now the main reason this is so
odd, is that If I have my python application running as usual, and I start the
command line application manually myself from the command line, then it’ll
transfer the file to my phone about 3 or 4 times faster than when the app is
launch using sub process. Take a look below for a quick snippet example of my
process launch code.<o:p></o:p></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:"Courier New"'><o:p> </o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:"Courier New"'>send = 'ussp-push --debug --dev hci%s %s@%s
/pblue/new/Media/%s %s' % (<o:p></o:p></span></p>
<p class=MsoNormal style='text-indent:36.0pt;text-autospace:none'><span
style='font-size:9.0pt;font-family:"Courier New"'>adapter, <o:p></o:p></span></p>
<p class=MsoNormal style='text-indent:36.0pt;text-autospace:none'><span
style='font-size:9.0pt;font-family:"Courier New"'>mac, <o:p></o:p></span></p>
<p class=MsoNormal style='text-indent:36.0pt;text-autospace:none'><span
style='font-size:9.0pt;font-family:"Courier New"'>result, <o:p></o:p></span></p>
<p class=MsoNormal style='text-indent:36.0pt;text-autospace:none'><span
style='font-size:9.0pt;font-family:"Courier New"'>media[3], <o:p></o:p></span></p>
<p class=MsoNormal style='text-indent:36.0pt;text-autospace:none'><span
style='font-size:9.0pt;font-family:"Courier New"'>media[0]<o:p></o:p></span></p>
<p class=MsoNormal style='text-indent:36.0pt;text-autospace:none'><span
style='font-size:9.0pt;font-family:"Courier New"'>)<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:9.0pt;
font-family:"Courier New"'>process = subprocess.Popen(<o:p></o:p></span></p>
<p class=MsoNormal style='text-indent:36.0pt;text-autospace:none'><span
style='font-size:9.0pt;font-family:"Courier New"'>send, <o:p></o:p></span></p>
<p class=MsoNormal style='text-indent:36.0pt;text-autospace:none'><span
style='font-size:9.0pt;font-family:"Courier New"'>shell=True, <o:p></o:p></span></p>
<p class=MsoNormal style='text-indent:36.0pt'><span style='font-size:9.0pt;
font-family:"Courier New"'>stdout=subprocess.PIPE,
stderr=subprocess.PIPE).stderr<o:p></o:p></span></p>
<p class=MsoNormal style='text-indent:36.0pt'><span style='font-size:9.0pt;
font-family:"Courier New"'><o:p> </o:p></span></p>
<p class=MsoNormal>Do you have any ideas what might be causing this slow behaviour?
Do spawned sub processes generally run at a much slower rate than expected? Or is
this something specific to my application?<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I’d love to work this out as when transferring larger
files this becomes a real pain, especial when I know there is no real physical
reason for it running so slowly.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Thanks guys for any help you can offer.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Rob<o:p></o:p></p>
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