ionic-app-scripts build --prod very slow slow

[liangwenzhong]

build prod took a lot of time.1192s = 20min .

ionic info:

global packages:

@ionic/cli-utils : 1.5.0
Cordova CLI      : 6.5.0
Ionic CLI        : 3.5.0

local packages:

@ionic/app-scripts              : 2.0.2
@ionic/cli-plugin-cordova       : 1.4.1
@ionic/cli-plugin-ionic-angular : 1.3.2
Cordova Platforms               : android 6.1.2 ios 4.3.1
Ionic Framework                 : ionic-angular 2.2.0

System:

Node       : v7.9.0
OS         : macOS Sierra
Xcode      : Xcode 8.3.2 Build version 8E2002
ios-deploy : 1.9.1
ios-sim    : 5.0.13
npm        : 4.2.0

my computer
MacBook Pro (Retina, 13-inch, Mid 2014)
cpu:2.8 GHz Intel Core i5
men:8 GB 1600 MHz DDR3

any solution? thanks !

[liangwenzhong]

@danbucholtz
please help !~ uglifyjs took a lot of time~~

[danbucholtz]

Is your app huge? How many pages are in it?

Thanks,
Dan

[liangwenzhong]

@danbucholtz thanks for ur time .
my app have about 50 pages. but i don't think it's a huge app. because i got a angular4.x app , about 60 pages . build quickly.

now , i use another way to build : ionic-app-scripts build --minifyjs --minifycss
very quickly . about 1min . this issuse caused by aot?

[jgw96]

Hello @liangwenzhong , would you mind running npm run ionic:build --prod --buildToEs5 and see if that speeds things up for you? Thanks!

[liangwenzhong]

@jgw96 I'm sorry for replying you so late.

still slow ~~ and with error .

[danbucholtz]

You probably need to give Node more memory.

which ionic (get path)
node --max_old_space_size=4096 /path/to/ionic serve

Thanks,
Dan

[liangwenzhong]

@danbucholtz

thanks for ur time .

about 700s . it took a lot of time .

and , after build --prod. when i run the app. it lost some css style .

[youssmak]

@jgw96 is the --buildToEs5flag safe ?
I had a RangeError: Maximum call stack size only with the --prod build : the webpack task was failed.
With the flag the webpack task works and builds in 24sec

[liangwenzhong]

@jgw96 any solution ? thanks !

[kaynz]

Hi,
may build is even slower:
cli packages: @ionic/cli-utils : 1.9.1 ionic (Ionic CLI) : 3.9.1 global packages: Cordova CLI : 7.0.1 local packages: @ionic/app-scripts : 2.1.4 Cordova Platforms : android 6.2.3 browser 4.1.0 ios 4.4.0 Ionic Framework : ionic-angular 3.6.0 System: Android SDK Tools : 26.0.2 Node : v8.4.0 npm : 5.3.0 OS : Linux 4.12
package.json: https://paste.xinu.at/hWne/

It is running for 30 minutes now: https://paste.xinu.at/iC4/

The step is: [11:08:31] webpack started ...

Without the --prod flag everything is working. It is a really small app, <10 pages.

/Edit/
It is still running: https://paste.xinu.at/BXYh1/

@jgw96
Do you have any suggestions for me? I already tried to get more output with --verbose and another OS but nothing.

/Edit2/

I stopped it now after 3h.