-*collapse* is written in C and C++, with algorithms much faster than base R's, has extremely low evaluation overheads, and scales well (benchmarks: [linux](https://duckdblabs.github.io/db-benchmark/) | [windows](https://github.com/AdrianAntico/Benchmarks?tab=readme-ov-file#benmark-results)). It excels on complex tasks, such as weighted statistics, mode/counting/deduplication, joins, pivots, panel data. <!-- Optimized R code ensures minimal evaluation overheads. , but imports C/C++ functions from *fixest*, *weights*, *RcppArmadillo*, and *RcppEigen* for certain statistical tasks. -->
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