(gc-value= name new-val)
  name: a sym
  new-val: any type
  returns #n

Tunes the garbage collector.

name must be the symbol ratio, and new-val must be a floating point number which is greater than or equal to (gc-value min-ratio).

This tunes the ratio of long-lived data to garbage data on the garbage-collected heap. Lower ratios will lead to proportionally smaller amounts of garbage, but they require the collector to do exponentially more work in order to keep up.