From ca6b59974a0f2e24a1d569d118b55c4fc66ff7a3 Mon Sep 17 00:00:00 2001
From: Eric Wong <e@80x24.org>
Date: Mon, 24 Jun 2019 02:52:45 +0000
Subject: ds: allow ->write callbacks to syswrite directly

We can bypass buffering when wbuf is empty when it's called
from a CODE reference passed to ->write.
---
 lib/PublicInbox/DS.pm | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'lib/PublicInbox/DS.pm')

diff --git a/lib/PublicInbox/DS.pm b/lib/PublicInbox/DS.pm
index 2aa9e3d2..0e48ed07 100644
--- a/lib/PublicInbox/DS.pm
+++ b/lib/PublicInbox/DS.pm
@@ -537,7 +537,8 @@ sub write {
     my $sock = $self->{sock} or return 1;
     my $ref = ref $data;
     my $bref = $ref ? $data : \$data;
-    if (my $wbuf = $self->{wbuf}) { # already buffering, can't write more...
+    my $wbuf = $self->{wbuf};
+    if ($wbuf && scalar(@$wbuf)) { # already buffering, can't write more...
         if ($ref eq 'CODE') {
             push @$wbuf, $bref;
         } else {
-- 
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