Why isn't the KryoSerializer enabled by default in SPARK? -


all blogs have read state kryoserializer better default java serializer. so, why isn't enabled default?

ok, after watching talks on these default settings, appears many default settings in spark chosen give best out of box experience typical 1st user trying run on laptop feel spark is.

when people go trouble of worrying performance , deploying real clusters, people have decided invest time seeing can problem space. then, can spend time deciding if kyro them, given code required register classes etc.


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