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Sending an image on iOS mobile increases the file size

(#4130) Bug Open: Needs triage dms media messaging mobile performance
by Complex edited

Reproduction steps

  1. Take a photo
  2. Send that photo on Fluxer. It can be in a group chat, a DM, or the Personal Notes section. Even in the send preview, a bigger file size is displayed.
Tested with iPhone 16 Pro Max with iOS settings: Settings -> Camera -> Formats Camera Capture: Most Compatible Photo Mode: 24 MP ProRAW & Res Control: Enabled Pro Default: JPEG Max

Expected behaviour

The file size stays consistent, or even smaller due to compression.

Actual behaviour

The file size is inflated, for example with IMG_8208.jpg, from 3.7 MB to 3.9 MB.

Build information

Version 2026.10.100, Beta 8, Channel Beta, Build 90, iOS 18.7.8 (arm64), Device iPhone17,2, Locale en-US, Push apns, Flutter 3.47.7, Dart 3.13.5

Platform

iOS

Evidence

IMG_8337.jpg IMG_8208.jpg IMG_8336.jpg The images I tested with are attached.

2 comments

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Comment by bizo
bizoReviewer 1 vote 1 reply
Can't reproduce In my case the file size actually decreased - Version 2026.10.100, Beta 8, Channel Beta, Build 90, iOS 26.6 (arm64), Device iPhone13,1, Locale en-GB, Push apns, Flutter 3.47.7, Dart 3.13.5
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Comment by Complex
Complex OP1 vote
Thanks, did not know you can click the version info for the full list. Tested again today with build 90: Version 2026.10.100, Beta 8, Channel Beta, Build 90, iOS 18.7.8 (arm64), Device iPhone17,2, Locale en-US, Push apns, Flutter 3.47.7, Dart 3.13.5 It seems to be a lot better now. I was seeing the first image go from 3.7 MB to 12+ MB on build 88, but now it only increases to 3.9 MB. Screenshot attached IMG_8355.png
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