Add FIXME about performance issue in stack_stash_add_trace()

diff --git a/stackstash.c b/stackstash.c
index 8c06f7b..44912e4 100644 (file)
--- a/stackstash.c
+++ b/stackstash.c
@@ -220,6 +220,13 @@ stack_stash_add_trace (StackStash *stash,
        StackNode *match = NULL;
        StackNode *prev;
 
+       /* FIXME: On x86-64 we don't get proper stacktraces which means
+        * each node can have tons of children. That makes this loop
+        * here show up on profiles.
+        *
+        * Not sure what can be done about it aside from actually fixing
+        * x86-64 to get stacktraces.
+        */
        prev = NULL;
        for (match = *location; match; prev = match, match = match->siblings)
        {