Making a change to an e2e test while running ng e2e causes entire app to rebuild, slow

[ghost]

Bug Report or Feature Request (mark with an x)

- [X ] bug report -> please search issues before submitting
- [ ] feature request

Versions.

$ ng --version                                                          
    _                      _                 ____ _     ___             
   / \   _ __   __ _ _   _| | __ _ _ __     / ___| |   |_ _|            
  / △ \ | '_ \ / _` | | | | |/ _` | '__|   | |   | |    | |             
 / ___ \| | | | (_| | |_| | | (_| | |      | |___| |___ | |             
/_/   \_\_| |_|\__, |\__,_|_|\__,_|_|       \____|_____|___|            
               |___/                                                    
@angular/cli: 1.4.2                                                     
node: 6.10.1                                                            
os: win32 x64                                                           

Repro steps.

• run ng e2e --port=4201
• make a change to an e2e test
• rebuild takes about 1.15 minutes.

With ng serve a code change only takes ~10 seconds to recompile. Why is rebuilding as part of e2e so slow?

[picheli20]

Have you already tried to set the --sourcemap false? It reduces a lot the build time (check #5775)

[FrancescoBorzi]

any news about this?

[filipesilva]

I think this issue is a duplicate of #2861. We don't have a watch mode for e2e so ng e2e shouldn't be rebuilding anything in the first place.

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