Loading recordings is slow

[naveensingh]

Checklist

• I can reproduce the bug with the latest version given here.
• I made sure that there are no existing issues - open or closed - to which I could contribute my information.
• I made sure that there are no existing discussions - open or closed - to which I could contribute my information.
• I have read the FAQs inside the app (Menu -> About -> FAQs) and my problem isn't listed.
• I have taken the time to fill in all the required details. I understand that the bug report will be dismissed otherwise.
• This issue contains only one bug.
• I have read and understood the contribution guidelines.

Affected app version

1.1.0

Affected Android/Custom ROM version

All Android versions

Affected device model

All Android devices

How did you install the app?

GitHub releases

Steps to reproduce the bug

1. Select a folder with a lot (100s) of recordings (or audio files)
2. Reopen the app
3. Record another recording

Expected behavior

• Recordings load immediately or at least after a few seconds.
• New recordings should show up immediately.

Actual behavior

• On an average device, loading takes around 10 seconds for just 300 files.
• New recordings show up after the app is done loading all recordings. One has to wait for minutes if there are a lot of recordings.

Screenshots/Screen recordings

No response

Additional information

The slowness is a result of Android's inefficient DocumentFile implementation which is what the app uses now. Querying the document Uri directly using DocumentsContract should significantly speed up the process.

Even then, for a lot of recordings, some kind of pagination would be the ideal solution.

[OxygenCobalt]

I'd definitely recommend doing direct queries over DocumentsContract to increase speed. If you use kotlin flows, you can also speed things up by using flatMapMerge on recursive flows. I don't know how much post-extraction work is needed, but you can also leverage kotlin flows/channels to distribute that work in parallel and increase overall speed.