Hi,

As far as I understand the specification, a program can call
timer-start! before timer-schedule! against the same timer object,
and vice versa. Is it right?

If so, when a task is scheduled by timer-schedule! given a positive
integer as parameter 'when', Is the elasped milliseconds to start
the task is measured from the timing at when timer-schedule! called,
or at when timer-start! called?

In other words I wonder why timer-start! is necessary at all.
For example, java.util.Timer
http://docs.oracle.com/javase/8/docs/api/java/util/Timer.html
has no corresponding method to timer-start!, because it is in action
immediately after constructed.

Cheers,
-- Takeshi Abe