@@ -153,11 +153,11 @@ const map = (collection, iterator, callback) => {
 	const array = Array.isArray(collection)
 		? /** @type {T[]} */ (collection)
 		: undefined;
+	// Pre-sized, because growing it or `Array.from` costs measurably more on
+	// the small collections this is called with.
 	/** @type {R[]} */
-	const results = [];
-	// Sized up front rather than grown, so a result never lands past the end
-	// while earlier items are still running.
-	if (array !== undefined) results.length = array.length;
+	// eslint-disable-next-line unicorn/no-new-array
+	const results = array === undefined ? [] : new Array(array.length);
 	let remaining = 1;
 	let finished = false;