Github user Leemoonsoo commented on the pull request:
https://github.com/apache/incubator-zeppelin/pull/710#issuecomment-183611903
Not 100%sure, but my understanding is `sudo: false` enables container based
infrastructure as well as cache.
For example, Apache Flink project looks like using cache capability of
travis-ci https://github.com/apache/flink/blob/master/.travis.yml
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