雪崩 Booom!

booom.js

const compose = require('koa-compose');

const mids = [];

for (var i = 0; i < 20; i++) {
  mids.push(async (context, next) => {
      await next();
  });
}

var fn = compose(mids);

var ctx = {};

console.time('bench');
for (var j = 0; j < 650000; j++) {
  fn(ctx).then(() => {}).catch(e => console.log(e));
}
console.timeEnd('bench');

async-await 消耗内存很厉害哇