- Deleted old optimizer and changed the meaning of optimize level to
be:
0: bypass the optimizer
1: copy propagation, constant folding, no inlining
1: copy propagation, constant folding, with inlining
The default is set to 1.
args to it, and returns 4 values:
* the process's pid
* the process's standard-input-port (for writing)
* the process's standard-output-port (for reading)
* the process's standard-error-port (for reading)
See lab/process-example.ss for a sample usage.