Github user zuyu commented on the issue:
https://github.com/apache/incubator-quickstep/pull/6
Comments on GitHub are fine.
I use `DCHECK` generally for performance reasons, whenever the debug mode
is good enough to ensure it will be ok as well in the release one. For example,
`DescriptionIsValid` would be a debug check only.
However, there are some cases where we have to use `CHECK`, i.e., the
expression within the `CHECK` needs to run in both modes (say
`SerializeToArray`).
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