# moth-sequence

**Repository Path**: tuzhe/moth-sequence

## Basic Information

- **Project Name**: moth-sequence
- **Description**: 分布式 ID 生成算法，目前只有 twitter 的 snowflake 算法
- **Primary Language**: Java
- **License**: GPL-2.0
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 8
- **Forks**: 0
- **Created**: 2017-07-26
- **Last Updated**: 2025-07-28

## Categories & Tags

**Categories**: distributed-service

**Tags**: None

## README

#moth-sequence
分布式 ID 生成算法，目前只有 twitter 的 snowflake 算法


在获取系统毫秒时，每次调用 native 方法， 有一定的性能问题，
为了解决这个问题，可以后台更新此毫秒，调用时从内存中读取毫秒

    /**
     * Returns the current time in milliseconds.  Note that
     * while the unit of time of the return value is a millisecond,
     * the granularity of the value depends on the underlying
     * operating system and may be larger.  For example, many
     * operating systems measure time in units of tens of
     * milliseconds.
     *
     * <p> See the description of the class <code>Date</code> for
     * a discussion of slight discrepancies that may arise between
     * "computer time" and coordinated universal time (UTC).
     *
     * @return  the difference, measured in milliseconds, between
     *          the current time and midnight, January 1, 1970 UTC.
     * @see     java.util.Date
     */
    public static native long currentTimeMillis();