User actions.
Signed offset of time zone from UTC.
A user action has a (user) name, an (user) email and an (action) date. The date is the number of seconds since 12:00 midnight January 1, 1970, UTC without accounting for leap seconds with an optional timezone info.
include IO with type t := tAdd the serialization of the value to an already existing buffer.
The compression level must be between 0 and 9: 1 gives best speed, 9 gives best compression, 0 gives no compression at all (the input data is simply copied a block at a time). The default value (currently equivalent to level 6) requests a default compromise between speed and compression.