What Sorting Algorithms Does JavaScript\'s `Array.sort()` Use, and Why?

Unveiling the Inner Workings of JavaScript's Array.sort()

The JavaScript Array.sort() function undeniably leverages a repertoire of algorithms to perform efficient sorting on input data. However, the precise algorithm employed by the default, vanilla sort implementation can intrigue curious minds.

Delving into the depths of the WebKit engine, the mastermind behind Chrome and Safari, reveals the strategic deployment of different sorting methods based on the nature of the input array:

• Numeric arrays: Spearheading the sort operation is the C standard library's std::qsort function, an esteemed tool that typically incorporates a blend of quicksort and introsort.
• Contiguous arrays of non-numeric data: These arrays embark on a journey through mergesort, when available, assuring stability in the final output. In the absence of merge sort, qsort gallantly steps in.
• Other arrays: Arrays that deviate from these categories engage in either selection sort (dubbed "min" sort") or, occasionally, an AVL tree-based approach. While the code paths are not explicitly documented, it remains a treasure hunt to uncover these sorting strategies.

Amidst these algorithmic nuances, a glimmer of optimization potential arises in the form of radix sort. The promise of O(N) runtime, far superior to O(N log N), tantalizes developers. However, until a more informed hand wields this potential, it remains a wishful note amidst the complexities of sorting algorithms.

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