https://issues.apache.org/bugzilla/show_bug.cgi?id=50921
Summary: Multiple replace function call can be replaced with a
single for loop to improve performance
Product: Lenya
Version: 2.0.3
Platform: PC
Status: NEW
Severity: normal
Priority: P2
Component: Miscellaneous
AssignedTo: dev@lenya.apache.org
ReportedBy: xiaom...@cs.wisc.edu
./apache-lenya-2.0.3-src/externals/cocoon_2_1_x/src/java/org/apache/cocoon/bean/Target.java
line: 371
more than 3 consecutive replace() is called to remove the special characters.
It's 3+ times slower than using a for loop replace them all.
{noformat}
e.g.
- str.replace('a', '#');
- str.replace('b', '%');
+ StringBuilder sb = new StringBuilder( str.length() );
+ for (int i=0; i < str.length(); i++)
+ {
+ char c = str.charAt(i);
+ if ( c == 'a' )
+ sb.append('#');
+ else if ( c== 'b' )
+ sb.append('%');
+ else
+ sb.append(c);
+ }
+ str = sb.toString();
{noformat}
This bug has the same problem as the MySQL bug :
http://bugs.mysql.com/bug.php?id=45699
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