[ARROW-15379] [JS] Use a flywheel for struct row

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: JavaScript
• External issue URL: https://github.com/apache/arrow/issues/30863
• Assignee: Unassigned
• Reporter: Dominik Moritz
• Created: 19/Jan/22 21:52
• Updated: 11/Jan/23 11:36

Description

When we access a row from a table or a struct, we create a proxy for the struct. We could improve the performance of these accesses by creating a single instance of the proxy and store it on the vector or the data type and then reuse that instance.

This should improve performance.

See https://github.com/apache/arrow/blob/7029f90ea3b39e97f1a671227ca932cbcdbcee05/js/src/visitor/get.ts#L219 and https://github.com/apache/arrow/blob/7029f90ea3b39e97f1a671227ca932cbcdbcee05/js/src/vector/struct.ts#L27.