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Haisheng Yuan commented on CALCITE-3891: ---------------------------------------- [~fan_li_ya] Yes. It will generate new AbstractList and iterator object. For non-hotspot methods, it is totally fine. But for hotspot methods, we can optimize it away, because they are low-hanging fruits, money on the table. > Remove use of Pair.zip in RelTraitSet.satisfies > ----------------------------------------------- > > Key: CALCITE-3891 > URL: https://issues.apache.org/jira/browse/CALCITE-3891 > Project: Calcite > Issue Type: Improvement > Components: core > Reporter: Haisheng Yuan > Assignee: Chunwei Lei > Priority: Major > Labels: pull-request-available > Attachments: image-2020-04-01-19-05-58-306.png > > Time Spent: 10m > Remaining Estimate: 0h > > It accounts too much time of the method, even this is a tiny portion overall. > !image-2020-04-01-19-05-58-306.png! -- This message was sent by Atlassian Jira (v8.3.4#803005)