（二）组织或者进行淫秽表演的；
const n = arr.length;
，这一点在旺商聊官方下载中也有详细论述
Features in bullets:
While I was writing this blog post, Vercel's Malte Ubl published their own blog post describing some research work Vercel has been doing around improving the performance of Node.js' Web streams implementation. In that post they discuss the same fundamental performance optimization problem that every implementation of Web streams face: