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From jtengyp <>
Subject [GitHub] spark issue #17898: Optimize the CartesianRDD to reduce repeatedly data fetc...
Date Mon, 08 May 2017 09:28:42 GMT
Github user jtengyp commented on the issue:
    Here is my test:
    Environment : 3 workers, each has 10 cores, 30G memory, 1 executor
    Test data : users : 480,189, each is a 10-dim vector, and items : 17770, each is a 10-dim
    With default CartesianRDD, cartesian time is 2420.7s.
    With this proposal, cartesian time is 45.3s
    50x faster than the original method.

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