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timeid

v1.0.4

Published

此库用来创建一个 App 生命周期内不重复的 id,在单应用内,而非集群中,我们有时候需要简单快速生成唯一的 key; 如 React 对象的 key,生成 key 的行为会非常频繁,我们需要比 uuid 和 nanoid 更高的性能,才能满足 UI 的条件

Readme

timeid

此库用来创建一个 App 生命周期内不重复的 id,在单应用内,而非集群中,我们有时候需要简单快速生成唯一的 key; 如 React 对象的 key,生成 key 的行为会非常频繁,我们需要比 uuid 和 nanoid 更高的性能,才能满足 UI 的条件

  1. 性能:算法仅是 App 生命周期开始的毫秒数+随机数组成的字符串,性能是 nanoid 的 9 倍,是 uuidv1 的 30 倍
  2. 体积:仅有 220b,无任何依赖,兼容 node 和 brower,兼容 typescript
  3. 时间:由于 id 是由时间作为前坠,可以记录毫秒外的 id 创建顺序

Math.rendom 已经使用了 Date 作为系数为什么还需要增加 Date.now ?

因为 Date.now + Math.random 的字符串组合,可以以毫秒作为每次 random 的分割,从而降低碰撞。

此函数执行的时间在 macbook-pro 15‘ 上 1ms 可以执行 749 次( < 1000 次), 而 Math.random 的碰撞条件远远大于此数,所以可以躲避碰撞

使用

import timeid from 'timeid';

console.log(timeid()); // 00.327891978321