Iterative Write Operations Cause Significant Delays and UI Freezes

[ashaytiwari]

I am encountering a performance issue with iterative write operations in Realm DB. My application involves calling APIs and iteratively storing the fetched data in Realm. This process had been working seamlessly for past years.

However, after upgrading both the app and Realm DB to version 20.1.0, the performance has degraded significantly. Previously, the entire operation would complete in approximately 3–4 minutes, but now it takes around 20 minutes. Additionally, during the data storage process, the app experiences severe freezing, making it unresponsive.

I have already tried various approaches, including batch write operations, adding timeouts to reduce UI blocking, and utilizing requestAnimationFrame. Unfortunately, none of these measures have resolved the issue.

I would appreciate any guidance or suggestions to address this performance regression and UI freeze.

React Native Info

System:  
OS: Windows 10 10.0.19045  
CPU: (8) x64 11th Gen Intel(R) Core(TM) i5-1145G7 @ 2.60GHz  
Memory: 389.11 MB / 7.40 GB  

Binaries:  
Node: 20.14.0 - C:\Program Files\nodejs\node.EXE  
Yarn: Not Found  
npm: 10.7.0 - C:\Program Files\nodejs\npm.CMD  
Watchman: Not Found  

SDKs:  
Android SDK:  
Android NDK: 22.1.7171670  
Windows SDK: Not Found  

IDEs:  
Android Studio: AI-221.6008.13.2211.9619390  
Visual Studio: Not Found  

Languages:  
Java: 17.0.12  

npmPackages:  
@react-native-community/cli: ^9.3.5 => 9.3.5  
react: 18.2.0 => 18.2.0  
react-native: 0.71.19 => 0.71.19