Ivy rebuild regression in AOT #34796
Description
🐞 bug report
Affected Package
Is this a regression?
Yes, the previous version in which this problem was not present was: 9.0.0-rc.2Description
In rc.2 ivy rebuild time in aot was much smaller
main.ts ~6s
app.component.ts ~6s
app.component.html ~6s
component-in-some-large-module.ts ~11s
component-in-some-large-module.html ~6s
component-in-some-large-module.less ~6s
some-small-lib.service.ts ~9s
component-in-small-module.ts ~6s
component-in-small-module.html ~5s
component-in-small-module.less ~6s
I think during beta phase rebuild time was even smaller, currently rebuild is ~20s no matter what I change in project
Here is benchmark for rc.9, 4th rebuild of main.ts
AngularCompilerPlugin._createOrUpdateProgram.ng.createProgram: 673.898ms
TypeChecker.gatherDiagnostics.ng.getNgSemanticDiagnostics: 31997.621ms
TypeChecker.message: 42739.608ms
AngularCompilerPlugin._createOrUpdateProgram.ng.loadNgStructureAsync: 11908.510ms
AngularCompilerPlugin._listLazyRoutesFromProgram.listLazyRoutes: 0.008ms
AngularCompilerPlugin._emit.ng.getNgStructuralDiagnostics: 0.004ms
AngularCompilerPlugin._emit.ng.gatherDiagnostics.ng.getTsSyntacticDiagnostics: 0.704ms
AngularCompilerPlugin._emit.ng.emit: 268.480ms
AngularCompilerPlugin._emit: 269.340ms
AngularCompilerPlugin._update._emit: 269.373ms
AngularCompilerPlugin._update: 13207.579ms
AngularCompilerPlugin._make: 13207.612ms
ngcLoader+/app/src/main.ts+.ngcLoader.AngularCompilerPlugin: 12065.946ms
ngcLoader+/app/src/main.ts+: 12066.811ms
Date: 2020-01-15T20:34:10.851Z - Hash: a7f06110bf2383093fdc
21 unchanged chunks
chunk {main} main.d2ddedbc0eb7b60a0ccf.js, main.d2ddedbc0eb7b60a0ccf.js.map (main) 24.8 MB [initial] [rendered]
Time: 18985ms
: Compiled successfully.
TypeChecker._update: 0.144ms
TypeChecker._createOrUpdateProgram.ng.createProgram: 360.438ms
TypeChecker.gatherDiagnostics.ng.getTsSemanticDiagnostics: 9293.606ms
Above numbers are for large monorepo app which source code contains about 160k typescript lines of code and 950 Components
🔬 Minimal Reproduction
https://stackblitz.com/...🔥 Exception or Error
🌍 Your Environment
Angular Version:
Angular CLI: 9.0.0-rc.8
Node: 12.10.0
OS: darwin x64
Angular: 9.0.0-rc.9
... animations, common, compiler, compiler-cli, core, forms
... language-service, platform-browser, platform-browser-dynamic
... platform-server, router
Ivy Workspace: Yes
Package Version
------------------------------------------------------------
@angular-devkit/architect 0.900.0-rc.6
@angular-devkit/build-angular 0.900.0-rc.8
@angular-devkit/build-ng-packagr 0.900.0-rc.8
@angular-devkit/build-optimizer 0.900.0-rc.6
@angular-devkit/build-webpack 0.900.0-rc.8
@angular-devkit/core 9.0.0-rc.8
@angular-devkit/schematics 9.0.0-rc.8
@angular/cdk 9.0.0-rc.4
@angular/cli 9.0.0-rc.8
@ngtools/webpack 9.0.0-rc.8
@schematics/angular 8.0.1
@schematics/update 0.900.0-rc.8
ng-packagr 9.0.0-rc.7
rxjs 6.5.4
typescript 3.6.4
webpack 4.41.2
Model Name: MacBook Pro
Processor Name: 6-Core Intel Core i7
Processor Speed: 2,2 GHz
Memory: 16 GB
macOS 10.15.1 (19B88)
Anything else relevant?