git-http-backend: favor sysread for regular files

We do not need line buffering, here; so favor sysread to
bypass extra copies which may be done by normal read.

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/PublicInbox/GitHTTPBackend.pm b/lib/PublicInbox/GitHTTPBackend.pm
index c84eefcf..50bb4331 100644
--- a/lib/PublicInbox/GitHTTPBackend.pm
+++ b/lib/PublicInbox/GitHTTPBackend.pm
@@ -73,7 +73,7 @@ sub serve {
                 my $n = 8192;
                 while ($len > 0) {
                         $n = $len if $len < $n;
-                        my $r = read($in, $buf, $n);
+                        my $r = sysread($in, $buf, $n);
                         last if (!defined($r) || $r <= 0);
                         $len -= $r;
                         $fh->write($buf);