Editing GNU Guile (section)

===Implementation details===
When using [[continuation]]s with [[call/cc]], a requirement of the Scheme standard, Guile copies the execution [[Call stack|stack]] into the [[Dynamic memory allocation|heap]] and back.<ref name="Blandy quote call/cc" /> Its manual suggests using delimited continuations instead, because they have a more efficient implementation.<ref name="Guile Reference Manual Continuations Section" />

Because foreign code may have [[Pointer (computer programming)|pointer]]s to Scheme objects, Guile uses the conservative [[Boehm garbage collector|Boehm–Demers–Weiser]] (BDW) [[Garbage collection (computer science)|garbage collector]].<ref name="Guile Reference Manual Conservative GC Section" />