Github user 1ambda commented on the issue:
https://github.com/apache/zeppelin/pull/1875
@jongyoul small amount of :)
if you want to reduce time for `npm install`, you can use `yarn install`
instead of. It will decrease 20~50 secs.
And https://github.com/apache/zeppelin/pull/1812 was merged recently so it
is applied to `zeppelin-web` module now.
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