lib/PublicInbox/HTTPD/Async.pm | 4 ----

diff --git a/lib/PublicInbox/HTTPD/Async.pm b/lib/PublicInbox/HTTPD/Async.pm
index 9e592f47412bf4f7aa1c32555196ee92b13a06de..75b3bd50e9a0ddeecee96fdf862d21ce92c00528 100644
--- a/lib/PublicInbox/HTTPD/Async.pm
+++ b/lib/PublicInbox/HTTPD/Async.pm
@@ -84,10 +84,6 @@ 	# but may be PublicInbox::GzipFilter::write.  PSGI requires
 	# *_wcb methods respond to ->write (and ->close), not ->print
 	$fh->write($$bref);
 
-	# we're done with this, free this memory up ASAP since the
-	# calls after this may use much memory:
-	$$bref = undef;
-
 	$self->{http} = $http;
 	$self->{fh} = $fh;
 }