[iOS] FastImage.preload causes 150–200% CPU usage and app termination when preloading large batches (300+ images)

Environment

React Native version: 0.76.0

react-native-fast-image version: ^8.6.3

Problem Summary

When using FastImage.preload() to preload a large number of remote images (approximately 300+ items), the app crashes only on iOS.

Observed symptoms: The CPU usage spikes to 200–220% during FastImage.preload()

The main thread becomes unresponsive

After ~5–10 seconds, iOS Watchdog kills the app

No JS exception is thrown; the process is terminated abruptly

This issue does not occur on Android, only iOS.

Code Snippet & Screenshot of the issue

const {data: themes} = useGetThemes({ categorySeq: undefined, countrySeq: nowCountry.countrySeq, type: ThemeTypeEnum.SEND, });

Request

Since this issue results in app crashes on iOS, it would be helpful to have:

• Confirmation whether this is a known limitation

• Guidance on safe usage

• Potential improvements to preload batching on iOS