speed up diffKeys() with new Set() API

[TechQuery]

Document

1. https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set/intersection
2. https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set/difference

Target

web-utility/source/data.ts

Lines 121 to 138 in 0530fc2

	export function diffKeys<T extends IndexKey>(oldList: T[], newList: T[]) {
	const map = {} as Record<T, DiffStatus>;
	for (const item of oldList) map[item] = DiffStatus.Old;
	for (const item of newList) {
	map[item] ||= 0;
	map[item] += DiffStatus.New;
	}
	return {
	map,
	group: groupBy(
	Object.entries<DiffStatus>(map),
	([key, status]) => status
	)
	};
	}