3.6 time
| (time expr) |
This form is used to measure the time taken to evaluate
expr. After evaluating expr, Scheme prints out the
time taken by the evaluation (including real time, time taken by the
cpu, and the time spent collecting free memory) and returns the result
of the expression.
(The reported time is measured as the number of milliseconds of CPU time required to obtain this result, the number of “real” milliseconds required for the result, and the number of milliseconds of CPU time (included in the first result) spent on garbage collection. The reliability of the timing numbers depends on the platform.)