Steps to reproduce

Clone https://github.com/jag2011/flutter_impeller_bunnies or run any app doing a lot of drawImageRect calls for Flutter v3.29.2 and compare to Flutter v3.27.4, and compare Skia to Impeller.

Expected results

We expect similar performance for Impeller and Skia, and no degradation in Impeller compared to v3.27.4.

This issue has been reported by many game creators and Flame users, which is to be expected since it's much more common to do many drawImageRect calls in the gamedev domain compared to normal apps.

Actual results

These results are from runs on a Nothing phone 1 (A063) in profile mode.

Entity count	Flutter version	Impeller	Result
300	v3.29.2	yes
300	v3.29.2	no
300	v3.27.4	yes
300	v3.27.4	no
2000	v3.29.2	yes
2000	v3.29.2	no
2000	v3.27.4	yes	Crash (sharedmem_gpumem_alloc: mmap failed errno 12 Out of memory)
2000	v3.27.4	no

These results are for Android, but you'll see similar a degradation on iOS too if the MRE is run there.

Many thanks to @jag2011 for the MRE and @gnarhard for detailed report of the degradation.

Code sample

Reproduction code can be found here: https://github.com/jag2011/flutter_impeller_bunnies

Flutter Doctor output

Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 3.29.2, on Ubuntu 24.04.2 LTS 6.8.0-55-generic,
    locale en_US.UTF-8)
[✓] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
[✓] Chrome - develop for the web
[✓] Linux toolchain - develop for Linux desktop
[✓] Android Studio (version 2023.1)
[✓] IntelliJ IDEA Community Edition (version 2024.3)
[✓] VS Code (version 1.98.2)
[✓] VS Code (version 1.99.0-insider)
[✓] Connected device (3 available)
[✓] Network resources

• No issues found!