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

まず、指定された Angular、Firebase、AngularFire、Ionic、Capacitor のバージョンを使って Android 上で最初の Firestore スナップショットリスナーを再現し、iOS および web と比較します。compat SDK が遅延とキャプチャのタイミング、またはデバッグ出力に影響するかを確認します。Android 固有の低速化が説明され、検証済みの修正または明確な upstream への引き継ぎが文書化されれば完了です。

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