angular / angular/angularfire

[Android] Firestore snapshot listeners is slow to retrieve data.

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Description

### Version info

**Angular:** 17.3.3

**Firebase:** 10.10.0

**AngularFire:** 17.0.1

**Other (e.g. Ionic/Cordova, Node, browser, operating system):**
Ionic:

Ionic CLI : 7.2.0 (/Users/user/.nvm/versions/node/v18.17.0/lib/node_modules/@ionic/cli)
Ionic Framework : @ionic/angular 7.8.2
@angular-devkit/build-angular : 17.3.2
@angular-devkit/schematics : 17.3.2
@angular/cli : 17.3.2
@ionic/angular-toolkit : 11.0.1

Capacitor:

Capacitor CLI : 5.7.4
@capacitor/android : 5.7.4
@capacitor/core : 5.7.4
@capacitor/ios : 5.7.4

Utility:

cordova-res : not installed globally
native-run : 2.0.1

System:

NodeJS : v18.17.0 (/Users/user/.nvm/versions/node/v18.17.0/bin/node)
npm : 10.5.0
OS : macOS Unknown

### How to reproduce these conditions

**Failing test unit, Stackblitz demonstrating the problem**

**Steps to set up and reproduce**

We have developed an Ionic Hybrid app for iOS, Android, and Web platforms, which has been functioning smoothly for the past two years. However, after multiple library updates, we have encountered an issue specific to Android devices. Retrieving the first fresh snapshot listener takes an exceptionally long time on Android, whereas iOS and web platforms retrieve the same snapshot listener in just 1 second on the same device. Android hybrid apps may take up to 60 seconds for this process.

Interestingly, restarting the app after the initial retrieval significantly improves the speed.

I am currently using the compat SDK instead of the Web modular SDK. I wonder if this choice affects the result.

**Sample data and security rules**

### Debug output

** Errors in the JavaScript console **

** Output from `firebase.database().enableLogging(true);` **

** Screenshots **

### Expected behavior

### Actual behavior

Contributor guide

Open the contributing guide

Research direction

Start by reproducing the first Firestore snapshot listener on Android using the listed Angular, Firebase, AngularFire, Ionic, and Capacitor versions, comparing it with iOS and web. Check whether the compat SDK affects the delay and capture timing or debug output; done means the Android-specific slowdown is explained and a verified fix or clear upstream handoff is documented.

Written by the indexing model from the issue text.

Assessment

Tech stack
android, angular, firebase, typescript
Domain
databases, mobile-dev
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
18/100

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