🐞 bug report

Affected Package

The issue is caused by package @angular/core

Is this a regression?

Don't know, seems like not.

Description

We have a big application with deep imports tree. There is function registerNgModuleType, that slow down application, depends on import count.

Problem is that its not depend on unique imports, just all imports, for every tree node down to leaf.

Function does nothing ( mb do something in compile time according to comment ), because it register modules, if them have ids. Modules in our app doesnt have them, no single module have id.

So function, that do nothing, slow down perfomance by 2 seconds for chrome, and 10s for ie11 on my pc. I just delete this function, and perfomance now is ok, and application fully workable.

🔬 Minimal Reproduction

Sorry, i cant add reproduction, because its requires enormous quantity of modules. I could generate them, if needed, but code clear enought to see the problem.

Anything else relevant?
Perfomance on navigation. All green fn blocks - registerNgModuleType and nested fns. There are a lot of calls, about 10k, i dont know. Each call takes 0.1ms, but all of them take 2s and do nothing.