[syntax] time exp

ChezScheme, Chicken, STk, Gauche: evaluates exp and reports the amount of execution statistics.

For ChezScheme: see also display-statistics.

[syntax] time exp1 exp2 ...

STklos: allows multiple exps.

[procedure] time [iterations] exp

SISC: may take optional iterations.

[procedure] time [date]

Scsh: without args, returns the current time. With date record, converts it to time.

SRFI-19 has current-time and date->time-utc.