PERFORMANCE: Vectorize operators

                 Key: PIG-688
             Project: Pig
          Issue Type: Improvement
            Reporter: Thejas M Nair

By Vectorization, I mean passing multiple (/vector of) records at a time 
between operators (and potentially other functions like udfs)

Vectorization of pig operators can improve performance by 
1. improving locality and cache utilization
2. Reducing number of function calls. Many functions calls are likely to be 
dynamically resolved. There may be some checks in each function that we might 
be able to do once for several recs.
3. Potentially benefit from cpu pipeline architecture. ( But I don't know how 
good java VM is at that ..)

To do vectorization in map stage, we need to use MapRunner - see PIG-687.

This message is automatically generated by JIRA.
You can reply to this email to add a comment to the issue online.

Reply via email to