Normally git caches the raw commit object contents in
"struct commit". This makes it fast to run parse_commit()
followed by a pretty-print operation.
For commands which don't actually pretty-print the commits,
the caching is wasteful (and may use quite a lot of memory
if git accesses a large number of commits).
For fetching operations like clone, we already disable
save_commit_buffer in everything_local(), where we may
traverse. But clone also parses commits before it even gets
there; it looks at commits reachable from its refs, and from
alternate refs.
In one real-world case with a large number of tags, this
cut about 10MB off of clone's heap usage. Not spectacular,
but there's really no downside.
Signed-off-by: Jeff King <peff@xxxxxxxx>
---
builtin/clone.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/builtin/clone.c b/builtin/clone.c
index 5ef81927a..3fca45e7e 100644
--- a/builtin/clone.c
+++ b/builtin/clone.c
@@ -858,6 +858,7 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
struct refspec *refspec;
const char *fetch_pattern;
+ save_commit_buffer = 0;
packet_trace_identity("clone");
argc = parse_options(argc, argv, prefix, builtin_clone_options,
builtin_clone_usage, 0);
--
2.11.0.765.g454d2182f