Merge groupBy signatures #742
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This should keep the API same but it has a performance benefit: the non-type-parameter version of groupBy by itself caused tsc to use over 6gb of memory and take 10x longer time on a real world codebase.
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This should keep the API same but it has a performance benefit: the
non-type-parameter version of
groupByby itself causedtsctouse over 6gb of memory and take 10x longer time on a real world
codebase.