HBASE-22284 optimization StringBuilder.append of AbstractMemStore.toString #182

WenFeiYi · saintstack · commit 876d2acf9ac7 · 2019-06-09T14:33:03.000-07:00
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/AbstractMemStore.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/AbstractMemStore.java
@@ -259,7 +259,7 @@ public String toString() {
     int i = 1;
     try {
       for (Segment segment : getSegments()) {
-        buf.append("Segment (" + i + ") " + segment.toString() + "; ");
+        buf.append("Segment (").append(i).append(") ").append(segment.toString()).append("; ");
         i++;
       }
     } catch (IOException e){

Original file line number	Diff line number	Diff line change
`@@ -259,7 +259,7 @@ public String toString() {`
`259`	`259`	`int i = 1;`
`260`	`260`	`try {`
`261`	`261`	`for (Segment segment : getSegments()) {`
`262`		`- buf.append("Segment (" + i + ") " + segment.toString() + "; ");`
	`262`	`+ buf.append("Segment (").append(i).append(") ").append(segment.toString()).append("; ");`
`263`	`263`	`i++;`
`264`	`264`	`}`
`265`	`265`	`} catch (IOException e){`