FrostBit is a distributed unique ID generator inspired by Twitter's Snowflake.

FrostBit focuses on lifetime and performance on many host/core environment. So it has a different bit assignment from Snowflake. A FrostBit ID is composed of

39 bits for time in units of 10 msec
8 bits for a sequence number
16 bits for a machine id

As a result, FrostBit has the following advantages and disadvantages:

• The lifetime (174 years) is longer than that of Snowflake (69 years)
• It can work in more distributed machines (2^16) than Snowflake (2^10)
• It can generate 2^8 IDs per 10 msec at most in a single machine/thread (slower than Snowflake) However, if you want more generation rate in a single host, you can easily run multiple FrostBit ID generators concurrently.

The MIT License (MIT) See LICENSE for details.