shards is limited to 3

[yigbn]

Is there an existing issue for this?

• I have searched the existing issues and didn't find mine.

Steps to reproduce

#1844 is great and enable parallelism
but for some reason it's not working for more than 3 tests ! ( why this 3 magic number ?)

Actual results

running more than 3 flows in parallel results in element not found on one of them ( android ) or flow stuck ( in ios )

Expected results

much more than 3 flows can run in parallel

About app

cross-platform app

About environment

mac

Logs

Logs

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Maestro version

1.39.9

How did you install Maestro?

install script (https://get.maestro.mobile.dev)

Anything else?

No response

[linear]

MAE-93 shards is limited to 3

[Fishbowler]

I've run successfully with 4, but not 5. Maximum shards is broadly a function of machine performance - Maestro is chatty, and each new shard adds load in terms of memory and cpu for both the runner and the target emulator, plus the extra load on the ADB interface.

I imagine if you were to create remote ADB connections to shards (rather than running emulators locally) you'd get different results too.