Can you share a test file so we can compare the results and rule out a bottleneck with your device?
this post was submitted on 07 Jul 2025
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Android
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What should I use to do the test?
Check the difference on other phones. Try different file manager apps to see which can do the task faster. Try turning on battery saver mode β sometimes background processes can slow foreground apps.
To be consistent test 3 times in flight mode. Also, when your phone is warn/hot it can slow down drastically compared to when its cold to the touch.
might have something to do with SAF, idk why but android file operation especially with the default file manager is pretty weird. I tend to just use unzip on termux or total commander and it generally seems to work better..
EDIT AGAIN:
Solved!
yes it the archive does contains thousands of small files! I think that could be the reason of low performance on android mobile!
thanks a lot @[email protected]
hey, i just run in the issue again today where an file would have taken several hours. instead i tried the app zarchiver and it was done in under a minute. idk if its the best app for that matter. but it worked for me.
thank you, I will try that!
In my experience the unzipping speed roughly matches my expectations of a phone unless the archive contains thousands of small files. I have a phone with a Snapdragon 870 SOC, 8GB RAM und UFS 3.1 storage and a Pixel 7 with Tensor G2, 8GB RAM and also UFS 3.1 storage. Performancewise they're roughly the same. On both decompression is fairly speedy for phone hardware. But when i tried to decompress texture packs for PS2 games with thousands of small texture files time to complete exploded up to several hours. I uneducatedely believe UFS3.1 is the bottleneck here? Decompression scales pretty well with multithreading so i dont expect the SOCs to be a problem. Maybe something something how android handles blocks of data, idk?
UFS 3.1 is not necessarily bottleneck here. It also depends on the optimization by OEM.
According to this youtuber some brands UFS 2.2 storage outperforms UFS 3.1 storage used by other brands solely due to their software optimization. Skip the video to 04:54s to see the zip uncompression test and a few mins back to see the results of other tests.
Thanks a lot!
yes it the archive does contains thousands of small files! I think that could be the reason of low performance on android mobile!
I am NOT in any way well known in this topic, so take it as source? my ass answer, but if I'd have to guess it would be
- Poorer singlethread performance of ARM CPUs
- Missing instruction sets
- Android algorithms written in Java/Kotlin where as Windows (WinRAR, 7zip) are written in C/C++
Most of the file browsers I've looked at use a native tool to unzip (sometimes literally invoking unzip).
Even the native/optimised byte code difference shouldn't make the process that much slower unless OP is just using a phone that's not very powerful.
Sry, I should state my device model in the post
Post updated
I am using google pixel 9a so this issue looks like it might not be the issue of storage speed? But I reckon it could be the issue of ARM CPUs