Commits on Mar 8, 2024

1. Provide ES5 version of the worker file …

   The `MULTI_THREAD` experimental feature rely on a Worker file which use
   ES2017 features.
   
   The most relied on way to import this file is through its "embedded
   version", which is usually not processed by bundlers/compilers of the
   application so it could be translated to a more compatible (usually
   older) version of JavaScript.
   
   Yet, we're encountering on the PlayStation 4 a case where the
   `MULTI_THREAD` feature may be used, the device is compatible to
   the WebWorker web API, but does not understand all of ES2017 features
   (let alone ES2015 features).
   
   For those devices, and because we could still want to be able to rely on
   ES2017 for the vast majority of devices that do support it, I propose a
   solution where we provide a supplementary Worker file that is compiled
   down to ES5.
   
   I rel on webpack instead of esbuild for this because esbuild does not
   target es5 easily.
   
   I'm not very confident of my webpack skills - even more considering that
   Worker environments have some constraints and I'm not sure of every
   web+JS features that babel + webpack might use, but hopefully, this
   should work (I'll test it).
   
   There are several downsides coming with this commit:
   
     1. Webpack takes several seconds on my PC to compile the worker files.
   
        As our building process was before relatively fast, this "slowness"
        is now visible during build, where "Bundling worker files..." is
        the slowest step on my PC.
   
     2. Because I'm not that confident on the file outputted, I decided to
        re-run all integration tests running in `MULTI_THREAD` mode both on
        the regular and the ES5 version of that script. This means that
        integration tests will take much more time to complete.

   

   peaBerberian committed Mar 8, 2024
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