perf(preview): only autorotate with Imaginary when needed - #65148
Open
CarlSchwan wants to merge 1 commit into
Open
CarlSchwan wants to merge 1 commit into
CarlSchwan wants to merge 1 commit into
Conversation
CarlSchwan
requested review from
Altahrim,
icewind1991,
leftybournes and
salmart-dev
and removed request for
a team
October 5, 2026 15:03
Every operation of an Imaginary pipeline decodes and encodes the full image again, so the autorotate operation made each JPEG preview about three times slower: 780ms instead of 286ms for the max preview of a 12 MP photo, 258ms instead of 80ms for a 256px one. Read the EXIF orientation from the start of the file and only add the operation when the image needs to be rotated. Assisted-by: ClaudeCode:claude-opus-5-5 Signed-off-by: Carl Schwan <carl@carlschwan.eu>
CarlSchwan
force-pushed
the
carl/preview-imaginary-autorotate
branch
from
October 5, 2026 17:45
1e9a2fc to
6b3aec3
Compare
This branch has not been deployed
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Summary
Every operation of an Imaginary pipeline decodes and encodes the full image again, so the autorotate operation made each JPEG preview about three times slower: 780ms instead of 286ms for the max preview of a 12 MP photo, 258ms instead of 80ms for a 256px one. Read the EXIF orientation from the start of the file and only add the operation when the image needs to be rotated.
TODO
Checklist
3. to review, feature component)stable32)AI (if applicable)