# Very slow build

**URL:** <https://forum.ionicframework.com/t/very-slow-build/75693>\
**Category:** ionic-v3\
**Created:** [January 9, 2017, 11:17pm UTC](https://forum.ionicframework.com/t/very-slow-build/75693 "2017-01-09T23:17:59Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![ol3j](https://avatars.discourse-cdn.com/v4/letter/o/8c91f0/32.png) [@ol3j](https://forum.ionicframework.com/u/ol3j)\
**Post date:** [January 9, 2017, 11:17pm UTC](https://forum.ionicframework.com/t/very-slow-build/75693/1 "2017-01-09T23:17:59Z")

</div>

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