d-markey
commented
2 years ago Hello Chris,
You asked for a minimal demo, here it is. The archive contains only the source code.
To try it out, create a new Flutter app (I named it "squadron_sample") and unzip the files attached.
The sample is based on Flutter's demo app, I just replaced the floating button with two buttons to test with / without workers and see the impact on the UI. The app computes 5K digits of pi (in hexadecimal) in two ways:
- wihout a worker pool: the calculation takes place in one go and the UI freezes
- with a pool of 5 workers: the calculation takes place in parallel and the UI remains responsive
I have tested on Android and Web (Chrome). Dont have the tools for Windows and iOS.
In terms of architecture, you will find:
- pi_digits.dart: the place where digits are computed (https://en.wikipedia.org/wiki/Bailey%E2%80%93Borwein%E2%80%93Plouffe_formula). It also implements the cross-platform worker.
- browser/pi_worker_browser.dart: the actual Web Worker. It's a dumb component simply forwarding work to the pi_digits service.
- vm/pi_worker_vm.dart: the actual Isolate for other platforms. Again, a dumb component.
- pi_worker_pool.dart: the actual worker pool, which conditionally imports the platform-dependant code.
Don't hesitate to contact me if you need further help or info.
csells
I'm interested in seeing the simplest possible usage of squadron, e.g. what's the code needed to calculate 10K digits of pi (or whatever)? how do I write that in a cross-platform way across mobile, desktop and web?