Opened 6 years ago

Closed 6 years ago

#29065 closed Cleanup/optimization (fixed)

Make django.core.validators only load Pillow if needed

Reported by: Collin Anderson Owned by: nobody
Component: Core (Other) Version: 2.0
Severity: Normal Keywords:
Cc: Collin Anderson, Akshesh Doshi Triage Stage: Accepted
Has patch: yes Needs documentation: no
Needs tests: no Patch needs improvement: no
Easy pickings: no UI/UX: no

Description

Before #21548, Pillow was only loaded if needed. It would be nice if this were still true.

Change History (8)

comment:1 by Collin Anderson, 6 years ago

Cc: Collin Anderson added
Has patch: set
Summary: Don't load Pillow unless needed → Only load Pillow if needed

​https://github.com/django/django/pull/9619

comment:2 by Tim Graham, 6 years ago

Component: File uploads/storage → Core (Other)
Type: Uncategorized → Cleanup/optimization

Can you elaborate on the motivation for this?

Last edited 6 years ago by Tim Graham (previous) (diff)

comment:3 by Akshesh Doshi, 6 years ago

Cc: Akshesh Doshi added

comment:4 by Collin Anderson, 6 years ago

A few advantages:
If for some reason you can't or have trouble installing pillow, everything else will work fine. It makes django a bit more "lightweight" to have the dependency be optional.

Loading Pillow increases memory usage by 5% (2mb) (in my quick testing) for a runserver on an empty project:
37608kb without loading pillow
39768kb with loading pillow

Also, doesn't matter quite as much, but running "check" also takes about 5% longer (25ms) on an empty project for me when including pillow:
360-400ms without loading pillow
393-424ms with loading pillow

Version 0, edited 6 years ago by Collin Anderson (next)

comment:5 by Loic Bistuer, 6 years ago

Triage Stage: Unreviewed → Accepted

+1 to making Pillow truly optional.

comment:6 by Tim Graham, 6 years ago

Summary: Only load Pillow if needed → Make django.core.validators only load Pillow if needed

Isn't it already "optional" with the try/except ImportError? I think the idea you're proposing is to import it lazily (which could help if it's installed but unused) which makes sense to me.

comment:7 by Collin Anderson, 6 years ago

Good point. The installed but unused case is what I'm running into.

comment:8 by Tim Graham <timograham@…>, 6 years ago

Resolution: → fixed
Status: new → closed

In 46b3e3f:

Fixed #29065 -- Made django.core.validators only load Pillow if needed.

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