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I've had better success with VMs for performance dogfooding in a desktop environment.

On mobile I've always gone back to testing on low end hardware, there are just too many inconsistencies when trying to simulate slower performance, outdated OS problems, touchscreen drivers, etc.

Assign a single core to the VM, 8 GB of RAM. Surely you can also bandwidth limit the storage.

For Webapps, chrome can emulate slow network and/or devices. For Kubernetes or Docker compose, you can restrict resources, I believe.

Dev Containers are cool. There’s a VSCode extension.