#20950: Use OrderedDicts in ORM only when needed
-------------------------------------+-------------------------------------
Reporter: akaariai | Owner: nobody
Type: | Status: closed
Cleanup/optimization | Version: master
Component: Database layer | Resolution: fixed
(models, ORM) | Triage Stage: Accepted
Severity: Normal | Needs documentation: 0
Keywords: | Patch needs improvement: 0
Has patch: 1 | UI/UX: 0
Needs tests: 0 |
Easy pickings: 0 |
-------------------------------------+-------------------------------------
Changes (by Anssi Kääriäinen <anssi.kaariainen@…>):
* status: new => closed
* resolution: => fixed
Comment:
In [changeset:"ff723d894d9272ea721d1996432ffc806c2b8180"]:
{{{
#!CommitTicketReference repository=""
revision="ff723d894d9272ea721d1996432ffc806c2b8180"
Fixed #20950 -- Instantiate OrderedDict() only when needed
The use of OrderedDict (even an empty one) was surprisingly slow. By
initializing OrderedDict only when needed it is possible to save
non-trivial amount of computing time (Model.save() is around 30% faster
for example).
This commit targetted sql.Query only, there are likely other places
which could use similar optimizations.
}}}
--
Ticket URL: <https://code.djangoproject.com/ticket/20950#comment:2>
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