Mutable exports, i.e. using this pattern
```
export let x = 0;
export function f() {
x += 1;
}
```
is problematic to transpile to CommonJS and Goog.module systems, we are
working on banning it google internal codebase.
The workaround is adding an explcit getter function.
PR Close #32425
How to run the benchmarks locally
Run in the browser
yarn bazel run modules/benchmarks/src/tree/{name}:devserver
# e.g. "ng2" tree benchmark:
yarn bazel run modules/benchmarks/src/tree/ng2:devserver
Run e2e tests
# Run e2e tests of individual applications:
yarn bazel test modules/benchmarks/src/tree/ng2/...
# Run all e2e tests:
yarn bazel test modules/benchmarks/...
Use of *_aot.ts files
The *_aot.ts files are used as entry-points within Google to run the benchmark
tests. These are still built as part of the corresponding ng_module rule.