perf report: Speed up exit path

When cmd_record exits the whole perf binary will exit right after,
so no need to traverse lots of complex data structures freeing them.

Sticked a comment for leak detectives and for a experiment with obstacks
to be performed so that we can speed up freeing that memory.

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Nick Piggin <npiggin@suse.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 4a7a743..55fc1f4 100644 (file)
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -348,7 +348,18 @@ static int __cmd_report(void)
                hists__tty_browse_tree(&session->hists_tree, help);
 
 out_delete:
-       perf_session__delete(session);
+       /*
+        * Speed up the exit process, for large files this can
+        * take quite a while.
+        *
+        * XXX Enable this when using valgrind or if we ever
+        * librarize this command.
+        *
+        * Also experiment with obstacks to see how much speed
+        * up we'll get here.
+        *
+        * perf_session__delete(session);
+        */
        return ret;
 }