[allura:tickets] Re: #6388 Deep trace of single pageload

[Dave Brondsema <br...@users.sf.net>]

`Neighborhood.query.get` is all over the place.  For example in a discussion thread, each post calls `User.icon_url` which calls `private_project` which uses `self.neighborhood` but even though that is a `LazyProperty` it is instance-level so doesn't get re-used much.  There are many other places too.

We could have a general purpose Neighborhood cache system and use it in lots of places.  Some tests might not want it to be cached though.  Another even generalized possibility is to extend Ming's identity map.  It currently indexes objects by `_id` only, but we could make it do lookups by any unique key(s) for a given model (e.g. `url_prefix` for `Neighborhood`).


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** [tickets:#6388] Deep trace of single pageload**

**Status:** in-progress
**Labels:** performance 
**Created:** Mon Jun 24, 2013 04:38 PM UTC by Dave Brondsema
**Last Updated:** Mon Dec 16, 2013 11:07 PM UTC
**Owner:** Dave Brondsema

Let's do a trace (e.g. start with TimerMiddleware verbose mode to get every pymongo call; maybe try `line_profiler` later) of common functionality to every page.  Focus on just the core parts of allura, not looking into the specifics of whatever page you're on.  Might be helpful to test hitting an external link URL, so there's not much tool-specific going on, just core route handling, project/tool lookup, permission checks, etc.  Identify opportunities for improvement.


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