threaded delta search: specify number of threads at run time

diff --git a/Documentation/git-pack-objects.txt b/Documentation/git-pack-objects.txt
index 6f17cff24ab784ee68767724dff6892b67b3ad53..f9b97956e36363504192056953d137c0f517f27d 100644 (file)
--- a/Documentation/git-pack-objects.txt
+++ b/Documentation/git-pack-objects.txt
@@ -173,6 +173,14 @@ base-name::
        length, this option typically shrinks the resulting
        packfile by 3-5 per-cent.
 
+--threads=<n>::
+       Specifies the number of threads to spawn when searching for best
+       delta matches.  This requires that pack-objects be compiled with
+       pthreads otherwise this option is ignored with a warning.
+       This is meant to reduce packing time on multiprocessor machines.
+       The required amount of memory for the delta search window is
+       however multiplied by the number of threads.
+
 --index-version=<version>[,<offset>]::
        This is intended to be used by the test suite only. It allows
        to force the version for the generated pack index, and to force