Apparenlty deactivating progress bar on npm make install much faster...

https://twitter.com/gavinjoyce/status/691773956144119808
https://news.ycombinator.com/item?id=10974929

setupbase.py

@@ -22,7 +22,7 @@ from distutils.cmd import Command
 from fnmatch import fnmatch
 from glob import glob
 from multiprocessing.pool import ThreadPool
-from subprocess import check_call
+from subprocess import check_call, check_output
 
 if sys.platform == 'win32':
     from subprocess import list2cmdline
@@ -346,7 +346,12 @@ class Bower(Command):
         
         if self.should_run_npm():
             print("installing build dependencies with npm")
+            npm_progress = check_output(['npm','get','progress']).decode().strip()
+            if npm_progress not in {'true', 'false'}:
+                raise ValueError('npm progress setting should be either `true `of `false` but %s was found.' % npm_progress)
+            run(['npm','set','progress=false'])
             run(['npm', 'install'], cwd=repo_root)
+            run(['npm','set','progress=%s'%npm_progress])
             os.utime(self.node_modules, None)
         
         env = os.environ.copy()