find.js如下，直接运行：第一个参数是查找范围，须以/结尾，第二个参数是用来匹配文件（夹）名的正则表达式，i开头则不分大小写；Windows系统最好用管理员身份运行，否则find.js不能区分文件夹和它的链接，Linux不清楚；搜索结果直接log在console里。

'use strict';

const FS=require('fs');
const FS_readdirSync=FS.readdirSync;
const FS_lstatSync=FS.lstatSync;
const log1=console.log.bind(console);
const Date_now=Date.now;
const push=Function.prototype.apply.bind(Array.prototype.push);
const $=process.argv[3];
const test=
	$.startsWith('i')
	?RegExp.prototype.test.bind(new RegExp($.slice(1),'iu'))
	:RegExp.prototype.test.bind(new RegExp($,'u'));

let time2;
const log=function(msg){
	if(time2){
		time2=Date_now();
	}else{
		time2=Date_now();
		log1('找出第一条结果的用时：'+(time2-time1)+'ms');
	}
	log1(msg);
};

const list=[process.argv[2]];
const search1=function(path){
	const list=[];
	for(let name of FS_readdirSync(path)){
		try{
			const pathname=path+name;
			if(FS_lstatSync(pathname).isDirectory()){
				if(test(name)){
					log(pathname+'/');
					push(list,search1(pathname+'/'));
				}else{
					list.push(pathname+'/');
				}
			}else if(test(name))log(pathname);
		}catch(error){}
	}
	return list;
};
const search2=function(path){
	try{
		const list1=search1(path);
		if(list1.length<5){
			for(let path of list1){
				search2(path);
			}
		}else{
			push(list,list1);
		}
	}catch(error){};
};
const time1=Date_now();
for(let i=0;list[i];i+=1){
	search2(list[i]);
	delete list[i];
}
log1('从开始搜索到找出最后一条结果的用时：'+(time2-time1)+'ms');

JS既然是最好的语言，超越Windows不是很正常嘛？