Q:

Ember build for production took more than expected time

I'm developing an Ember application, in that application
Building application for production environment gives following warning during build process. 
>>ember build --environment production
WARNING: Node v7.2.1 is not tested against Ember CLI on your platform.  We recommend that you use the most-recent "Active LTS" version of Node.js. 
/ Building[WARN] `assets/vendor.js` took: 27201ms (more than 20,000ms)
cleaning up...
Built project successfully.  Stored in "dist/". 
File sizes:
 - dist/assets/vendor-55a426e75e5239020a12bb7bfc6ffc2a.js: 759.74 KB (195.13 KB gzipped)
 - dist/assets/vendor-d41d8cd98f00b204e9800998ecf8427e.css: 0 B

i want to suppress these waning messages, for this i tried --silent with command. 
ember build --environment production --silent

Still im getting following warning:
[WARN] `assets/vendor.js` took: 27201ms (more than 20,000ms)

cam some one tell me how to suppress this warning or fix this? 
OS: Windows 2012 R2 server

A:

This is a bug in broccoli-uglify-sourcemap, I have opened an issue to track & fix:
https://github.com/ef4/broccoli-uglify-sourcemap/issues/38

I have released a new version of broccoli-uglify-sourcemap (v1.5.1) which now abides by --silent and also provides a better warning message. 
Your issue should vanish once this dependency upgrades. 
The following command can be used to confirm you are atleast at v1.5.1

npm ls broccoli-uglify-sourcemap

