Function forEach

src/utils/array.ts:7–17

(items: Iterable<T> | ArrayLike<T> | Set<T>, iterator: (item: T) => void)

// NOTE: Iterating Array-like items using `for .. of` is 3x slower in Firefox
// https://jsben.ch/kidOp
export function forEach<T>(items: Iterable<T> | ArrayLike<T> | Set<T>, iterator: (item: T) => void): void {
    if (isArrayLike(items)) {
        for (let i = 0, len = items.length; i < len; i++) {
            iterator(items[i]);
        }
    } else {
        for (const item of items) {
            iterator(item);
        }
    }
}

// NOTE: Pushing items like `arr.push(...items)` is 3x slower in Firefox
// https://jsben.ch/nr9OF