valitydev/snowflake
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snowflake/README.md
Andrey Fadeev da498a0bee
Fix possibility of non-monotonic id generation after clock adjustment (#5) 
Also add checks of of time and machine_id sizes
2020-03-31 15:19:52 +03:00

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Snowflake: a 64-bit UUID generator

Original design by Twitter.

1> application:start(snowflake).
2> snowflake:new().
<<0,231,97,68,12,192,0,0>>
3> snowflake:serialize(snowflake:new()).
<<"AOdiTg5AAAA=">>
4> sets:size(sets:from_list([snowflake:new() || _I <- lists:seq(1,100000)])).
100000
5> lists:map(fun ({T, _}) -> T end,[timer:tc(snowflake, new, []) || _I <- lists:seq(1,100)]).
[93,46,42,42,42,53,55,43,42,43,73,36,34,33,39,52,48,39,35,
 54,36,34,33,34,40,35,33,33,34|...]