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https://issues.apache.org/jira/browse/ARROW-11347?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17279348#comment-17279348
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Paul Taylor commented on ARROW-11347:
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[~domoritz] see my comment here:
https://issues.apache.org/jira/browse/ARROW-11351?focusedCommentId=17279344&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-17279344
tl;dr; the Row API doesn't use JS's Map, the abstract Row<T> base class just
implements the Map<T> interface. The actual lookup is delegated to its concrete
subclass implementations StructRow and MapRow. StructRow still uses the
flyweight, and MapRow attempts a similar optimization via Proxies if available.
> [JavaScript] Consider Objects instead of Maps
> ---------------------------------------------
>
> Key: ARROW-11347
> URL: https://issues.apache.org/jira/browse/ARROW-11347
> Project: Apache Arrow
> Issue Type: Improvement
> Components: JavaScript
> Reporter: Dominik Moritz
> Priority: Major
> Labels: performance
> Original Estimate: 24h
> Remaining Estimate: 24h
>
> A quick experiment
> (https://observablehq.com/@domoritz/performance-of-maps-vs-objects) seems to
> show that object accesses are a lot faster than map accesses. Would it make
> sense to switch to objects in the row API to improve performance?
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