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[BUG] Slow preview and pictures/video load from device memory #781
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opened 2026-02-04 22:28:15 +03:00 by OVERLORD
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Originally created by @stefano99 on GitHub (Mar 30, 2023).
The bug
When loading from memory, the app starts to lag and the time required to load the previews goes to around 10s, 20s at times.
It happened as soon as I updated the app to the 1.51.0 version.
Resetting anad reinstalling does nothing.
That's how it looks like when I open the app, or when I scroll down the gallery:

Downgrading back to 1.50.0 brings back the usual speed.
Also, opening the gallery from another device which doesn't sync any folder or from the web doesn't present this behavior.
That's the log file:
Immich_log_2023-03-30T192314.732190.csv
The OS that Immich Server is running on
Ubuntu 20.04 HWE (Linux 5.15.0)
Version of Immich Server
1.52.0
Version of Immich Mobile App
1.52.0
Platform with the issue
Your docker-compose.yml content
Your .env content
Reproduction steps
Additional information
No response
@alextran1502 commented on GitHub (Mar 30, 2023):
Can you help me confirm again which version of the mobile app you are running?
@stefano99 commented on GitHub (Mar 30, 2023):
The last one from the Play Store: 1.52.0
The slowness started with v1.51.0
@alextran1502 commented on GitHub (Mar 30, 2023):
Are you experiencing the same issue if you access the instance with local IP?
@stefano99 commented on GitHub (Mar 30, 2023):
Yes, it still happens

Tried just now and that's the result:
I'm shooting in HEIF and HEVC formats, can that be the issue?
@alextran1502 commented on GitHub (Mar 30, 2023):
It could be, since now it will try to read the local file to work with the offline mechanism. Before it loaded the data from the server
@stefano99 commented on GitHub (Mar 30, 2023):
Ok, I can try to shoot in jpeg for a couple of days and report back here if that improves the loading times.
@alextran1502 commented on GitHub (Mar 30, 2023):
On my iPhone, I am also shooting in HEIC, but I don't experience this issue. Which phone are you using?
@stefano99 commented on GitHub (Mar 30, 2023):
I'm using a Samsung Galaxy S21
Also, it heats up a lot while loading the pictures in the Immich app
@alextran1502 commented on GitHub (Mar 30, 2023):
Can you go to the upload screen, then go to the album selection screen and click on this icon?
Does it load instantly, or are you also facing the same issue you are seeing on the main timeline?
@stefano99 commented on GitHub (Mar 30, 2023):
Same thing: it takes a lot to load, and scrolling while loading makes it worse.
I'm syncing also an album with only jpegs and it's the same.
That's how it looks

At the moment, don't know why, it's showing almost all the pictures as if they're only present on the server and not on the device.

But looking at the backup information, it showsthe Total and Backup numbers as matching, and the same as before, like this:
If the pics are uploaded but not present locally, it shows the pictures instantly, and the same for the previews.
There's also this error popping out in the logs:

@alextran1502 commented on GitHub (Mar 30, 2023):
interesting log. We haven't seen that before. Can you export the log and attach it here?
@stefano99 commented on GitHub (Mar 30, 2023):
Sure!
Here it is:
Immich_log_2023-03-30T214349.208426.csv
Logging out and back in fixed it, btw
@stefano99 commented on GitHub (Apr 14, 2023):
Update after some time.
I moved the whole photo library away from the phone, and started shooting in jpg.
It's roughly 50 pictures now, and it's (of course) faster.
Still, it takes a bit to load the previews of the pictures from the local storage.
Noticeably more than the ones stored only on the server, which load almost instantly.
@fyfrey commented on GitHub (May 12, 2023):
can you check again with app version 1.55? we maybe did some improvements in the unreleased app version 1.54.1
@stefano99 commented on GitHub (May 24, 2023):
Until version 1.56 it was identical.
Just updated to v1.57 and it looks like it's a bit faster!
Reloading assets after I close a picture it's still the same, but it's slightly faster when launching the app.
@fyfrey commented on GitHub (May 25, 2023):
thanks for checking again. at least the lazy loading seems to help a bit. are you still seeing loading times above 1 second?
and another test: can you create an album with only assets uploaded via web or CLI (not the app) and open that album in the app? does it load these assets fast?
@Obsidiannite21 commented on GitHub (Jun 29, 2023):
I'm also experience this issue. I reported it directly to @alextran1502 and @fyfrey via discord but wanted to put my info here to offer trouble shooting assistance if needed.
@stefano99 commented on GitHub (Jun 29, 2023):
@fyfrey sorry for the late reply, didn't see the notification!
Yes I'm still getting high loading times.
If the file isn't in the phone memory, it's almost instant in loading the previews, so everything that's uploaded through anything else, or is been deleted from the phone, is fast.
@fyfrey commented on GitHub (Jun 29, 2023):
I think we can put in a workaround, to always load images from the server (configurable in the app settings). Unless we find the reason for this super slowness
edit: made this PR #3044 to provide the workaround as it seems there is no solution we can apply (since the issue is deep in one of Immich's dependencies)
@fyfrey commented on GitHub (Jun 29, 2023):
I fear it's this bug: https://github.com/bumptech/glide/issues/4608
@Obsidiannite21 commented on GitHub (Jun 30, 2023):
Thank you for such a quick workaround!! @fyfrey
@stefano99 commented on GitHub (Jul 1, 2023):
@fyfrey I switched to jpeg after noticing this bug, and still getting the same behavior with the new images.
I have to say, though, that with HEIC and HEVC it's even slower, so it's not strictly related to HEIF/HEIC format, but it does make it worse.
The workaround is great! Thank you!
@fyfrey commented on GitHub (Jul 2, 2023):
Thanks for the info.
@stefano99 @Obsidiannite21 what resolution do the photos have? Is this like a 100 megapixel camera?
@stefano99 commented on GitHub (Jul 2, 2023):
@fyfrey 12MP for photos, 4k@30fps for videos (but it's the same even at 1080p)
The loading time increases as the number of elements on local storage increases, so if I remove photos and videos from the local storage, the first couple of pics I take load almost instantly.
(The elements only on the server are not affected)
I'll keep an eye on that to see if there's a specific number of elements where it starts to lag.
@Obsidiannite21 commented on GitHub (Jul 2, 2023):
@fyfrey @stefano99 Same here - 12MP for photos. I also have a large library.
@stefano99 commented on GitHub (Jul 5, 2023):
I'm now at 56 between photos and videos and it's starting to lag a bit while loading or reloading the library after closing a pic/video or reopening the app.
@fyfrey commented on GitHub (Jul 6, 2023):
With the newest release, you can enable the workaround in the advanced settings. Assets already uploaded should then load just fine
@stefano99 commented on GitHub (Jul 6, 2023):
@fyfrey thank you so much!
It seems to be working flawlessly!
Thank you!
@Snyaify commented on GitHub (Aug 8, 2023):
@fyfrey thank you so much for workaround.
On my OnePlus 10 PRO with 12k photos in gallery it took eternity to load previews.
@fyfrey commented on GitHub (Sep 10, 2023):
Could you all check whether another flutter app - Aves Gallery (https://github.com/deckerst/aves) has the same issues in loading thumbnails on your devices? If it works fine, we could probably look into how they do the image loading
@Obsidiannite21 commented on GitHub (Sep 10, 2023):
@fyfrey Aves Gallery worked flawlessly on my device with 10k ish pictures.
@stefano99 commented on GitHub (Sep 10, 2023):
@fyfrey for me too Aves worked fast. Not as fast as the Samsung Gallery, but faster than how was Immich.
Lately though Immich is going way faster.
I had around 1k pictures and videos on device until last week, and it was way faster in loading the previews.
Still, sometimes it took around 5-10 secs to load the previews or the full image, but it's faster than before.
The problem, to me, is that it needs to reload the previews almost always, even when I'm just closing a picture.
This happens way more frequently if the image is loading from memory, and way less loading from the server.
And this makes the slowness more noticeable.
@fyfrey commented on GitHub (Sep 10, 2023):
Thanks for testing! Sounds promising. Sadly, it's non-trivial to change the asset handling :-/
So, don't expect a fix soon. We'll need to discuss how to go about this, and what to do about iOS (Aves is Android only)
@Krustak commented on GitHub (Mar 14, 2024):
Hi, Im on latest 1.98.2 version and sadly this BUG is still present. Enabling "Prefer remote images" works, but as I understand its just workaround ...
@alextran1502 commented on GitHub (Mar 14, 2024):
@Krustak Correct, there seems to be some issue with some specific devices that have weird underlying API that cause the speed of getting local file really slow
@Ynng commented on GitHub (Apr 18, 2024):
Experiencing the same issue here on an Oneplus 12 shooting HEIC
@alextran1502 commented on GitHub (Apr 18, 2024):
@Ynng You can go into the settings and turn on "prefer remote images" in the "advanced section" to overcome this at the moment
@ZtereoHYPE commented on GitHub (May 13, 2024):
I have the same issue on a Google Pixel 8, and the only issue with the workaround is that it causes pictures to completely fail to load while I'm offline, which happens very frequently to me.
@foyzur commented on GitHub (May 19, 2024):
I have the same problem. The workaround works but it does not while offline. On Samsung Galaxy S24 Ultra.
@4f1sh3r commented on GitHub (May 23, 2024):
I have the same problem on my wife’s Galaxy S20. More information about my problem can be found here: https://github.com/immich-app/immich/discussions/9614
It could indeed have something to do with HEIC pictures. I know that she has some of them locally on the phone.
@grazy27 commented on GitHub (Aug 20, 2024):
Same issue on S23 Ultra, 'preffer remote' helps, but native gallery is blazingly fast and it's local, maybe there's a special Samsung-specific API used for thumbnails?
@Leyous commented on GitHub (Jan 21, 2025):
I have the same issue on standard galaxy S23. Like some users said: HEIC format is even slower to load compared to JPG.
@JshStadler commented on GitHub (Feb 26, 2025):
I also have this issue
@YarosMallorca commented on GitHub (Mar 5, 2025):
I also noticed this issue on my Pixel 6. It gets slower over time, but it doesn't get as slow as on an S23 Ultra. I compared it, and S23 Ultra is almost half as slow loading local thumbnails. And yes, HEIC is slower to load (especially photos taken with an iPhone) on both phones.
Not sure what is causing this, but turning on "prefer remote image" in Advanced settings resolves this completely.
@laxmanpradhan commented on GitHub (Apr 6, 2025):
I have the same issue, local content on the phone is slow to load while content from the server load very fast. I'm using a Pixel 8 Pro which should be quite fast. Also if I view the same photos in a normal gallery like Fossify Gallery, there are no loading issues at all. I tried loging out and back in so it would rebuild the timeline but that didn't seem to help. Note the camera is taking JPG photos not HEIC.
@danieldietzler commented on GitHub (Sep 12, 2025):
Should be fixed with the new beta timeline. If it's not please let us know and we can re-open