Detailed changes:
- remove `UNINITIALIZED`, initialize change detection fields with `undefined`.
* we use `view.numberOfChecks === 0` now everywhere
as indicator whether we are in the first change detection cycle
(previously we used this only in a couple of places).
* we keep the initialization itself as change detection get slower without it.
- remove passing around `throwOnChange` in various generated calls,
and store it on the view as property instead.
- change generated code for bindings to DOM elements as follows:
Before:
```
var currVal_10 = self.context.bgColor;
if (jit_checkBinding15(self.throwOnChange,self._expr_10,currVal_10)) {
self.renderer.setElementStyle(self._el_0,'backgroundColor',((self.viewUtils.sanitizer.sanitize(jit_21,currVal_10) == null)? null: self.viewUtils.sanitizer.sanitize(jit_21,currVal_10).toString()));
self._expr_10 = currVal_10;
}
var currVal_11 = jit_inlineInterpolate16(1,' ',self.context.data.value,' ');
if (jit_checkBinding15(self.throwOnChange,self._expr_11,currVal_11)) {
self.renderer.setText(self._text_1,currVal_11);
self._expr_11 = currVal_11;
}
```,
After:
```
var currVal_10 = self.context.bgColor;
jit_checkRenderStyle14(self,self._el_0,'backgroundColor',null,self._expr_10,self._expr_10=currVal_10,false,jit_21);
var currVal_11 = jit_inlineInterpolate15(1,' ',self.context.data.value,' ');
jit_checkRenderText16(self,self._text_1,self._expr_11,self._expr_11=currVal_11,false);
```
Performance impact:
- None seen (checked against internal latency lab)
Part of #13651
How to run the benchmarks locally
Run in the browser
$ build.sh (only needed 1x to copy over third party resources) $ cp -r ./modules/benchmarks ./dist/all/ $ ./node_modules/.bin/tsc -p modules --emitDecoratorMetadata -w $ gulp serve $ open http://localhost:8000/all/benchmarks/src/tree/ng2/index.html?bundles=false
Run e2e tests
$ export NODE_PATH=$(pwd)/dist/all:$(pwd)/dist/tools $ ./node_modules/.bin/protractor protractor-e2e.conf.js --specs=dist/all/benchmarks/e2e_test/tree_spec.js
Options for protractor with protractor-e2e.conf.js:
--bundles=true: use prebuilt bundles--ng-help: show all available options
Run benchmarks tests
$ export NODE_PATH=$(pwd)/dist/all:$(pwd)/dist/tools $ ./node_modules/.bin/protractor protractor-perf.conf.js --specs=dist/all/benchmarks/e2e_test/tree_perf.js
Options for protractor with protractor-perf.conf.js:
--bundles=true: use prebuilt bundles--ng-help: show all available options
Compile *_aot.ts files
These files are compiled as part of the compiler_cli integration tests.
See @angular/compile_cli/integrationtest/tsconfig.json