Array element assignment (version: 3)

Replace the content of one array with the content of another array. Assume that: • alternative approaches are not a choice: • reusing the second array; • cloning the second array; • the arrays are not the same, are not sparse and are of the same length; • content order must be kept; • the difference between +0 and -0 and the differences between NaNs are irrelevant: • we can use === or Object.is() to avoid assignments; • otherwise, elements are opaque; The tests with literals, constants and variables serve as baselines for performance comparison.

Comparing performance of: Do nothing at the beginning, cold hardware vs Constant binding to literal vs Constant binding to constant vs Constant binding to variable vs Constant binding to array vs Constant reverse binding to array vs Variable binding to literal vs Variable binding to constant vs Variable binding to variable vs Variable binding to array vs Variable reverse binding to array vs Variable assignment to literal vs Variable assignment to constant vs Variable assignment to variable vs Variable assignment to array vs Variable reverse assignment to array vs Array assignment to literal vs Array reverse assignment to literal vs Array assignment to constant vs Array reverse assignment to constant vs Array assignment to variable vs Array reverse assignment to variable vs Array assignment to array vs Array reverse assignment to array vs Conditional variable assignment to literal !== vs Conditional variable assignment to constant !== vs Conditional variable assignment to variable !== vs Conditional variable assignment to array !== vs Conditional variable reverse assignment to array !== vs Conditional array assignment to literal !== vs Conditional array reverse assignment to literal !== vs Conditional array assignment to constant !== vs Conditional array reverse assignment to constant !== vs Conditional array assignment to variable !== vs Conditional array reverse assignment to variable !== vs Conditional array assignment to array !== vs Conditional array reverse assignment to array !== vs Conditional variable assignment to literal Object.is() vs Conditional variable assignment to constant Object.is() vs Conditional variable assignment to variable Object.is() vs Conditional variable assignment to array Object.is() vs Conditional variable reverse assignment to array Object.is() vs Conditional array assignment to literal Object.is() vs Conditional array reverse assignment to literal Object.is() vs Conditional array assignment to constant Object.is() vs Conditional array reverse assignment to constant Object.is() vs Conditional array assignment to variable Object.is() vs Conditional array reverse assignment to variable Object.is() vs Conditional array assignment to array Object.is() vs Conditional array reverse assignment to array Object.is() vs Loop from start with literal length vs Loop from end with literal length vs Loop from start with constant length vs Loop from end with constant length vs Loop from start with constant first length vs Loop from end with constant first length vs Loop from start with constant second length vs Loop from end with constant second length vs Loop from start with variable first length vs Loop from end with variable first length vs Loop from start with variable second length vs Loop from end with variable second length vs Loop from start re-evaluating first length vs Loop from end evaluating first length vs Loop from start re-evaluating second length vs Loop from end evaluating second length vs Loop in first vs Loop in second vs Loop of first vs Loop of second vs .forEach() on first vs .forEach() on first closure vs .forEach() on second vs .forEach() on second closure vs Array-destructuring constant binding vs Array-destructuring variable binding vs Array-destructuring variable assignment vs Array-destructuring element assignment vs Array-destructuring rest assignment vs Object-destructuring constant binding with numbers vs Object-destructuring reverse constant binding with numbers vs Object-destructuring variable binding with numbers vs Object-destructuring reverse variable binding with numbers vs Object-destructuring variable assignment with numbers vs Object-destructuring reverse variable assignment with numbers vs Object-destructuring element assignment with numbers vs Object-destructuring reverse element assignment with numbers vs Object-destructuring constant binding with strings vs Object-destructuring reverse constant binding with strings vs Object-destructuring variable binding with strings vs Object-destructuring reverse variable binding with strings vs Object-destructuring variable assignment with strings vs Object-destructuring reverse variable assignment with strings vs Object-destructuring element assignment with strings vs Object-destructuring reverse element assignment with strings vs Object-destructuring rest assignment vs Object.assign() vs Do nothing at the end, warm hardware

Created: one year ago by: Registered User

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