From f82385e58741aa83dccc4876ae69a6033217d9ed Mon Sep 17 00:00:00 2001
From: Jaikiran Pai <jpai@openjdk.org>
Date: Sat, 18 Feb 2023 11:58:05 +0000
Subject: [PATCH] 8302623: jarsigner - use BufferedOutputStream to improve
 performance while creating the signed jar

Reviewed-by: weijun
---
 .../share/classes/jdk/security/jarsigner/JarSigner.java        | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/jdk.jartool/share/classes/jdk/security/jarsigner/JarSigner.java b/src/jdk.jartool/share/classes/jdk/security/jarsigner/JarSigner.java
index e279c5a084b..97d3d2ba877 100644
--- a/src/jdk.jartool/share/classes/jdk/security/jarsigner/JarSigner.java
+++ b/src/jdk.jartool/share/classes/jdk/security/jarsigner/JarSigner.java
@@ -688,7 +688,8 @@ public final class JarSigner {
             throw new AssertionError(asae);
         }
 
-        ZipOutputStream zos = new ZipOutputStream(os);
+        ZipOutputStream zos = new ZipOutputStream(
+                (os instanceof BufferedOutputStream) ? os : new BufferedOutputStream(os));
 
         Manifest manifest = new Manifest();
         byte[] mfRawBytes = null;