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epriestley 4adaf53bf0 Dramatically increase cache hit rate for feed
Summary:
Ref T8631. The query plan for feed stories is really bad right now, because we miss caches we should be hitting:

  - The workspace cache is stored at each query, so adjacent queries can't benefit from the cache (only subqueries). Feed has primarily sibling queries.
    - There is no technical reason to do this. Store the workspace cache on the root query, so sibling queries can hit it.
  - In `ObjectQuery`, we check the workspace once, then load all the PHIDs. When the PHIDs are a mixture of transactions and objects, we always miss the workspace and load the objects twice.
    - Instead, check the workspace after loading each type of object.
  - `HandleQuery` does not set itself as the parent query for `ObjectQuery`, so handles never hit the workspace cache.
    - Pass it, so they can hit the workspace cache.
  - Feed's weird `PhabricatorFeedStory::loadAllFromRows()` method does not specify a parent query on its object/handle queries.
    - Just declare the object query to be the "root" query until this eventually gets cleaned up.

Test Plan: Saw queries for each object drop from 4-6x to 1x in `/feed/`.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T8631

Differential Revision: https://secure.phabricator.com/D13479
2015-06-30 11:19:41 -07:00
bin Add some of a billing daemon skeleton 2015-01-30 11:29:05 -08:00
conf Mark some strings for translation 2015-06-09 23:06:52 +10:00
externals Work around mailparse bug (?) with messages that have no terminal newline 2015-04-21 09:49:40 -07:00
resources Stop running a second symbol migration 2015-06-27 13:45:51 -07:00
scripts Add "Mailing List" users 2015-06-03 18:42:33 -07:00
src Dramatically increase cache hit rate for feed 2015-06-30 11:19:41 -07:00
support Remove PhabricatorStartup::getGlobal/setGlobal mechanism 2015-06-04 17:26:52 -07:00
webroot Popup datepicker should respect user preferred week start day 2015-06-27 10:06:48 -07:00
.arcconfig Remove "project.name" from .arcconfig 2015-05-25 22:35:15 +10:00
.arclint Turn lint TODO comments back on 2015-05-27 10:06:55 -07:00
.editorconfig Fix text lint issues 2015-02-12 07:00:13 +11:00
.gitignore When registering a device, write a device ID 2015-01-22 16:06:04 -08:00
LICENSE Fix text lint issues 2015-02-12 07:00:13 +11:00
NOTICE Update Phabricator NOTICE file to reflect modern legal circumstances 2014-06-25 13:42:13 -07:00
README.md Marginal improvements to README 2015-03-08 11:29:06 -07:00

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