From 3ea2cce5f2942153f8c51d39ec2444e4e19dcbdc Mon Sep 17 00:00:00 2001
From: Andrew Gaul <gaul@apache.org>
Date: Sat, 25 Jul 2020 16:39:04 +0900
Subject: [PATCH] Optimize MultiBlobInputStream.read()

Previously this allocated a byte array for every call.
---
 .../blobstore/config/LocalBlobStore.java      | 19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)

diff --git a/blobstore/src/main/java/org/jclouds/blobstore/config/LocalBlobStore.java b/blobstore/src/main/java/org/jclouds/blobstore/config/LocalBlobStore.java
index e8d90e0cdf..20f5fc2c63 100644
--- a/blobstore/src/main/java/org/jclouds/blobstore/config/LocalBlobStore.java
+++ b/blobstore/src/main/java/org/jclouds/blobstore/config/LocalBlobStore.java
@@ -1010,12 +1010,21 @@ public final class LocalBlobStore implements BlobStore {
 
       @Override
       public int read() throws IOException {
-         byte[] b = new byte[1];
-         int result = read(b, 0, b.length);
-         if (result == -1) {
-            return -1;
+         while (true) {
+            if (current == null) {
+               if (!blobs.hasNext()) {
+                  return -1;
+               }
+               current = blobs.next().getPayload().openStream();
+            }
+            int result = current.read();
+            if (result == -1) {
+               current.close();
+               current = null;
+               continue;
+            }
+            return result & 0x000000FF;
          }
-         return b[0] & 0x000000FF;
       }
 
       @Override