proposal: mechanism for using alternate backends

[j-f1]

To use this API, first define a enum or struct conforming to JSBridge and define the required methods. Then, call JSObject.global(using: MyJSBridge.self) to get the global object.

Currently, JSTypedArray and JSBridgedClass only work with the default bridge, but I didn’t want to put too much effort into figuring out how to get those APIs to work properly if this approach didn’t end up getting accepted.

[github-actions]

Time Change: +641ms (7%) 🔍

Total Time: 8,761.25ms

Test name	Duration	Change
Serialization/Write JavaScript number directly	182.5ms	+11.5ms (6%)	🔍
Serialization/Swift Int to JavaScript	2,716ms	+186ms (6%)	🔍
Serialization/Swift String to JavaScript	2,737.5ms	+141.5ms (5%)	🔍
Object heap/Increment and decrement RC	2,950.75ms	+301.5ms (10%)	⚠️

ℹ️ View Unchanged

Test name	Duration	Change
Serialization/Write JavaScript string directly	174.5ms	+0.5ms

_{performance-action}

[j-f1]

So it looks like it is slower. That’s unfortunate.

[j-f1]

@kateinoigakukun’s proposal in discord is much better. Closing this for now.