[Bug] Documentation: Liveness Custom CDN missing wasm setup instructions

[reesscot]

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On which framework/platform are you having an issue?

React

Which UI component?

Liveness

How is your app built?

N/A

What browsers are you seeing the problem on?

No response

Which region are you seeing the problem in?

No response

Please describe your bug.

Currently the documentation for setting up a custom CDN only shows instructions for how to setup the SIMD version of the tensorflow backend.

According to the documentation, Tensorflow supports regular WASM, SIMD, and SIMD + Multithreading
https://blog.tensorflow.org/2020/09/supercharging-tensorflowjs-webassembly.html

At runtime we test for SIMD and multithreading support and serve the appropriate Wasm binary. Today we serve a different binary for each of the following cases:

Default: The runtime does not support SIMD or multithreading
SIMD: The runtime supports SIMD but not multithreading
SIMD + multithreading: The runtime supports SIMD and multithreading

Customers are reporting a problem with older iPhones on iOS 15 and 16 which don't support SIMD. We need to update the instructions to include all three files in customers' custom CDN.

What's the expected behaviour?

See above

Help us reproduce the bug!

See above

Code Snippet

// Put your code below this line.

Console log output

No response

Additional information and screenshots

No response

[marcosconceicao]

@reesscot Hi Scott, i don't know if is something that was solved yet but we noticed that when the files are missing the SDK doesn't throw any exception, we spent a few hours testing multiple scenarios to find the error.
Even without the Custom CDN solution, if the user has a network error when loading the model, what can we do to track those cases and also improve user experience?

[hbuchel]

Hi @marcosconceicao Which version of react-liveness are you using? When I test with a malformed URL for the binaryPath or to the model.json file, I can see the following errors thrown which we're throwing here. :

[marcosconceicao]

We tested with 3.0.16.
Our folder included model.json and only one binary tfjs-backend-wasm-simd.wasm.
These other 2 files were missing: tfjs-backend-wasm-threaded-simd.wasm, tfjs-backend-wasm.wasm.

The build happened without issues, and testing with iOS 17 worked well.
When we tested with iOS 16 or iOS 15 it failed (probably due to the files missing), but no errors appeared in the screen and the console.