Using Dart FFI for Compute-Heavy Tasks in Flutter Apps
summary
Uses Dart FFI to offload heavy image work to C, shows concrete codegen and build hooks via FFI gen and the new native toolchain, and demonstrates passing data with native malloc and sharing memory across isolates. Benchmarks: premultiplication and flood‑fill move from Dart to C and gain up to 95% time reduction with SIMD plus threading, yielding overall ~20× speedup on iOS and ~13× on Android. Notes pitfalls: native finalizer timing, manual free, and transferable typedata overhead.
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chapters (9)
- 0:00Dart FFI introduction
- 1:50Why choose Dart FFI
- 7:59FFI advantages and trade-offs
- 9:04Setting up FFI in Flutter
- 15:34FFI package structure
- 16:59FFI examples and annotations
- 24:51FFI plugins vs packages
- 27:47Real-world FFI performance
- 36:48Q&A
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