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From "Matthias Boehm (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SYSTEMML-2278) Performance issues spark table(X,Y) w/ large num distinct
Date Wed, 25 Apr 2018 07:29:00 GMT
Matthias Boehm created SYSTEMML-2278:
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             Summary: Performance issues spark table(X,Y) w/ large num distinct
                 Key: SYSTEMML-2278
                 URL: https://issues.apache.org/jira/browse/SYSTEMML-2278
             Project: SystemML
          Issue Type: Task
            Reporter: Matthias Boehm


{code}
N = 1e9
X = seq(1,N);
Y = 1+seq(1,N)/1000;
while(FALSE){}

Z = table(X,Y)

while(FALSE){}
print(sum(Z));
{code}



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