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title: Same CPU, Five Times the Memory: What Flutter Really Costs
description: A peer-reviewed study by seven researchers compared Flutter (Dart, Riverpod) and native Android (Kotlin, Jetpack Compose) implementations of an on-device AI...
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# Same CPU, Five Times the Memory: What Flutter Really Costs

**[Medium](https://daily.dev/sources/medium_js)** · 4 min read · 0 upvotes · 0 comments

## Summary

A peer-reviewed study by seven researchers compared Flutter (Dart, Riverpod) and native Android (Kotlin, Jetpack Compose) implementations of an on-device AI content moderation system. CPU usage and battery drain were nearly identical between the two frameworks. The major difference was memory: Flutter averaged 955 MB versus 184 MB for native Android, largely due to Flutter's bundled rendering engine, Dart VM, and GC heap. Latency also differed — Flutter averaged 764 ms per frame versus 645 ms for Android, with ONNX inference 1.43x slower on Flutter due to Dart FFI overhead compared to Kotlin's direct JNI calls. Tail latency was notably worse on Flutter, with 12.8% of frames exceeding 1,000 ms and one frame hitting 7,829 ms during a GC pause. The study recommends treating Flutter's memory footprint as a hard constraint on low-RAM devices and monitoring 95th/99th percentile frame times rather than averages.

## Full article

daily.dev links to this article rather than hosting it. Read it at the original source: <https://medium.com/@WohllebeRoss/same-cpu-five-times-the-memory-what-flutter-really-costs-1e8ca8fec765>

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---

Tags: [#android](https://daily.dev/tags/android), [#flutter](https://daily.dev/tags/flutter), [#dart](https://daily.dev/tags/dart)

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