🏎 Tracking: Dart2JS Perf+Code Size Improvements 🏎

[matanlurey]

This is a tracking issue of all issues related to code size and runtime performance for AngularDart.

Assumptions

As it's possible to try to improve our output many ways, we'd like to focus on the following only:

• Dart 2.0 semantics (we don't expect any fixes prior to Dart 2.0 and strong-mode types)
• All applications use the following configuration:
  • --trust-type-annotations
  • --trust-primitives
• All applications run with the following assumptions:
  • No use of noSuchMethod
  • No import to dart:mirrors or dart:isolate
  • We don't require .runtimeType for anything but debugging purposes
  • No intentional reliance on dynamic/duck typing (we'd consider it a bug in our code)

We're also intentionally not focusing on better/improved JS-interop here.

Issues

• Use of runtimeType anywhere makes reified generics everywhere costlier (#31329)

Planned changes

Other changes planned by the Dart2JS team not specifically tied to one issue.

• Remove all support for dart:mirrors and dart:isolate (#30538).

[matanlurey]

/cc @sigmundch

[matanlurey]

Lets re-open this when I have more actionable items.