Provides the number of elapsed milliseconds since an arbitrary reference time in the past. The reference time will be the same for a given session, but may differ between sessions.
Details
A convenience function for building concurrent applications. The resolution
of the clock depends on the underlying system timing facilities and may not
be particularly fine-grained. This utility should however be faster than
using Sys.time().
Examples
time <- mclock(); msleep(100); mclock() - time
#> [1] 102