optimize: optimize ColumnUtils.addEscape method performance (apache#2044

)
brains-platform · May 25, 2020 · 7e04d2a · 7e04d2a
1 parent 7c38bb0
commit 7e04d2a
Showing 1 changed file with 7 additions and 2 deletions.
diff --git a/rm-datasource/src/main/java/io/seata/rm/datasource/ColumnUtils.java b/rm-datasource/src/main/java/io/seata/rm/datasource/ColumnUtils.java
@@ -166,8 +166,13 @@ private static String addEscape(String colName, String dbType, Escape escape) {
             }
         }
 
-        StringBuilder result = new StringBuilder(2 * (String.valueOf(escape.value).length()) + colName.length());
-        return result.append(escape.value).append(colName).append(escape.value).toString();
+        char[] buf = new char[colName.length() + 2];
+        buf[0] = escape.value;
+        buf[buf.length - 1] = escape.value;
+
+        colName.getChars(0,colName.length(),buf,1);
+
+        return new String(buf).intern();
     }
 
     private static boolean isMysqlSeries(String dbType) {