Very slow build


#1

The first build&run on device is fast but the next build&run is slower and slower and slower…
The task “ngc finished” was reached extremely in 330s

ionic info
Cordova CLI: 6.4.0
Ionic Framework Version: 2.0.0-rc.4
Ionic CLI Version: 2.1.18
Ionic App Lib Version: 2.1.9
Ionic App Scripts Version: 0.0.44
ios-deploy version: 1.9.0
ios-sim version: 5.0.6
OS: macOS Sierra
Node Version: v5.12.0
Xcode version: Xcode 8.2.1 Build version 8C1002

for android
[23:49:42] ionic-app-scripts 0.0.44
[23:49:42] build prod started …
[23:49:42] clean started …
[23:49:42] clean finished in 8 ms
[23:49:42] copy started …
[23:49:42] ngc started …
[23:49:42] copy finished in 383 ms
[23:50:14] ngc finished in 32.29 s
[23:50:14] webpack started …
[23:50:28] webpack finished in 14.04 s
[23:50:28] uglifyjs started …
[23:50:28] sass started …
[23:50:30] sass finished in 2.22 s
[23:50:30] cleancss started …
[23:50:33] cleancss finished in 2.44 s
[23:50:48] uglifyjs finished in 19.60 s
[23:50:48] build prod finished in 65.97 s

for ios
[23:58:22] ionic-app-scripts 0.0.44
[23:58:23] build prod started …
[23:58:23] clean started …
[23:58:23] clean finished in 24 ms
[23:58:23] copy started …
[23:58:23] ngc started …
[23:58:24] copy finished in 1.64 s
[23:59:09] ngc finished in 46.02 s
[23:59:09] webpack started …
[23:59:23] webpack finished in 14.63 s
[23:59:23] uglifyjs started …
[23:59:23] sass started …
[23:59:27] sass finished in 3.38 s
[23:59:27] cleancss started …
[23:59:30] cleancss finished in 3.04 s
[23:59:52] uglifyjs finished in 29.05 s
[23:59:52] build prod finished in 89.77 s