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Date: Tue, 25 Sep 2012 14:35:28 -0700
From: Junkshops <junkshops@gmail.com>
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To: Oscar Benjamin <oscar.j.benjamin@gmail.com>
Subject: Re: Memory usage per top 10x usage per heapy
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Xref: csiph.com comp.lang.python:30128

On 9/25/2012 2:17 PM, Oscar Benjamin wrote:
> I don't know whether it would be better or worse but it might be worth 
> seeing what happens if you replace the FileContext objects with tuples.
I originally used a string, and it was slightly better since you don't 
have the object overhead, but I wanted to code to an interface for the 
context information so started a Context abstract class that FileContext 
inherits from (both have __slots__ set). Using an object without 
__slots__ set was a disaster. However, the difference between a string 
and an object with __slots__ isn't severe.

>
> I can't see anything wrong with that but then I'm not sure if the 
> lambda function always keeps its frame alive. If there's only that one 
> line in the __init__ function then I'd expect it to be fine.

That's it, I'm afraid.

>
> Perhaps you could see what objgraph comes up with:
> http://pypi.python.org/pypi/objgraph
>
> So far as I know objgraph doesn't tell you how big objects are but it 
> does give a nice graphical representation of which objects are alive 
> and which other objects they are referenced by. You might find that 
> some other object is kept alive that you didn't expect.
>
I'll give it a shot and see what happens.

Cheers, MrsEntity