summaryrefslogtreecommitdiff
path: root/doc/ref/api-scheduling.texi
diff options
context:
space:
mode:
Diffstat (limited to 'doc/ref/api-scheduling.texi')
-rw-r--r--doc/ref/api-scheduling.texi7
1 files changed, 7 insertions, 0 deletions
diff --git a/doc/ref/api-scheduling.texi b/doc/ref/api-scheduling.texi
index e040904cf..b23082192 100644
--- a/doc/ref/api-scheduling.texi
+++ b/doc/ref/api-scheduling.texi
@@ -1037,6 +1037,13 @@ future has completed. This suspend/resume is achieved by capturing the
calling future's continuation, and later reinstating it (@pxref{Prompts,
delimited continuations}).
+Note that @code{par-map} above is not tail-recursive. This could lead
+to stack overflows when @var{lst} is large compared to
+@code{(current-processor-count)}. To address that, @code{touch} uses
+the suspend mechanism described above to limit the number of nested
+futures executing on the same stack. Thus, the above code should never
+run into stack overflows.
+
@deffn {Scheme Syntax} future exp
Return a future for expression @var{exp}. This is equivalent to: