Github user viirya commented on the pull request:
https://github.com/apache/spark/pull/2217#issuecomment-54279202
@rxin, I can get the idea that immutability makes the whole thing safer for
broadcasted variables. So I am just wondering if it is worth providing such
mutability for the use case I mentioned.
If the data size of re-broadcasted variables is big such as very long
vector or huge matrix, then the communication cost would be big for large-scale
data.
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