I agree multiple imports is not supposed to be a problem, but I have seen it cause issues, or seen issues be resolved by not doing it. Remember that the Google Implementation of Python has its own "Specialness" and what is true in traditional python is not always quite the same in GAE land. From: google-appengine@googlegroups.com [mailto:google-appengine@googlegroups.com] On Behalf Of Karl Rosaen Sent: Monday, January 16, 2012 7:32 AM To: google-appengine@googlegroups.com Subject: Re: [google-appengine] Re: Why are several production issues related to DeadlineExceededErrors being ignored? Brandon, thanks so much for taking the time to put together the video, very helpful. The key insight seem to be: time spent in the queue waiting for a frontend counts towards the limit for a DeadlineExceedError. This seems silly - seems to me user visible latency, and framework level timeout enforcement should be decoupled in this case. But good insight and glad to better understand this behavior. This also makes me wonder what the benefit of having 'auto' for max pending latency would ever be - I'm going to slide mine down to ~1s. One quibble about your advice for 'avoid importing code more than once': this shouldn't be a major issue in python unless you are importing a module from within a function that is called several times: Although Python's interpreter is optimized to not import the same module multiple times, repeatedly executing an import statement can seriously affect performance in some circumstances. http://wiki.python.org/moin/PythonSpeed/PerformanceTips#Import_Statement_Ove rhead Just wanted to clarify that one needn't fret about the same utility module being imported from two modules or anything like that. Karl -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To view this discussion on the web visit https://groups.google.com/d/msg/google-appengine/-/7FTyQ34tagsJ. To post to this group, send email to google-appengine@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
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