fix(Observable): introduce Subscribable interface to use instead of Observable in input arguments

[vladima]

public surface of Subscribable is much smaller than in Observable which significantly reduces space to explore in when doing type-related-to checks in TypeScript compiler.

[benlesh]

This sounds like a better change. How do the builds perform with this change?

[benlesh]

Also, for my own reference, this is semi-related to #1463 .. but only in the typings aspect.

[vladima]

Perf is roughly on par with tag properties

[vladima]

@Blesh can you please tell if there is anything else that needs to be done on this PR?

[benlesh]

@vladima sorry, I've been sick and busy catching up from being sick...

[benlesh]

This LGTM.

[vladima]

Great! Does it mean that it will be available in the next beta release of RxJS?

[kwonoj]

Does it mean that it will be available in the next beta release of RxJS?

: I believe so. I'll double check and check this in around today or tomorrow, can be in time before next release freeze hits.

[kwonoj]

Merged with 2256e7b, great appreciate for effort @vladima ! 🎉

[lock]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.