dataloader

• Dataloader is a utility often used in GraphQL to batch and cache requests, which helps in reducing the number of database queries and improving performance.
  • By batching multiple requests into a single query, it effectively addresses the n+1 problem.

示例

const DataLoader = require('dataloader');
 
const userLoader = new DataLoader(keys => myBatchGetUsers(keys));

在一个事件循环中执行多次以下代码：

userLoader.load('key');

将会把多个传入的参数放在数组中调用批处理函数