ng serve uses a lot of CPU %

[areijngoudt]

Mac OSX El Capitan

Versions.

angular-cli: 1.0.0-beta.17
node: 5.7.1
os: darwin x64

angular-cli uses about 85% CPU when I only use ng serve during development, also when I'n not changing code but just use the webapp in a browser.

[kylecordes]

I experienced the same thing here. Sitting idle, with nothing changing, approximately one CPU core burns 100% in ng serve. Latest node, latest OSX, CLI beta 17.

[mseemann]

npm i fsevents should solve this.

[masaanli]

Not working on Windows.

[areijngoudt]

installing fsevents solves this issue on mac. Thanks @mseemann

[rryter]

I don't think this issue should be closed. Manually installing fsevents can not be the longterm solution.

[benyaminshoham]

Does it make sense to add fsevents to the dependencies of @angular/cli?

[msnatu]

@mseemann Thanks a lot!

[jlberrocal]

fsevents only work for mac, but what about windows and linux, in my case what is literally eating is my ram, ng process consumes 1.2GB which i consider a lot for a process like that one

[JohannesRudolph]

Jose, please keep in mind that node is GC'd so it will happily use available memory and won't collect aggressively until pressured by the OS which doesn't happen if you have a lot of RAM ;-) So unless ng is eating all your memory and your OS starts paging other stuff you should be fine.

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On Wed, Jun 7, 2017 at 5:38 PM, Jose Berrocal ***@***.***> wrote: fsevents only work for mac, but what about windows and linux, in my case what is literally eating is my ram, ng process consumes 1.2GB which i consider a lot for a process like that one — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#2748 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAH8N0Lg5SAAoyQVRdvVPBVsaZNKX8wiks5sBrX2gaJpZM4KYq8B> .

[Almenon]

have you tried using task manager to lower the affinity / priority of the process?

[chestercharles]

@Almenon 's solution to lower the affinity/priority of the process has been working for me. However, it is kinda tedious to do every time I run ng serve.

If I don't manually lower the affinity/priority of the process, my CPU usage is at 99%.

Running on windows 8

[trumbitta]

@rryter also, if I add it to my package.json every build not happening under Mac OS will fail:

npm ERR! notsup Unsupported platform for fsevents@1.1.3: wanted {"os":"darwin","arch":"any"} (current: {"os":"linux","arch":"x64"})