stringbuilder « performance « Java Testing Q&A

1. Java performance of StringBuilder in a loop    stackoverflow.com

I've a performance related question regarding use of StringBuilder. In a very long loop I'm manipulating a StringBuilder and passing it to another method like this:

for (loop condition) {
    ...

2. StringBuilder vs String concatenation in toString() in Java    stackoverflow.com

Given the 2 toString() implementations below, which is prefered

public String toString(){
    return "{a:"+ a + ", b:" + b + ", c: " + c +"}";
}

public String toString(){
 ...

3. getting better performance appending strings than going through standard Java stringbuilder.append    stackoverflow.com

as part of the process of populating a search engine, I populate a Berekely-DB value-store as well. This process is repeated each night and at the moment +/- 60% of the ...

4. Fastest way to pad a number in Java to a certain number of digits    stackoverflow.com

Am trying to create a well-optimised bit of code to create number of X-digits in length (where X is read from a runtime properties file), based on a DB-generated sequence number ...

5. Java CLI Application performance with StringBuilder    stackoverflow.com

General:
I am writing a socket client that receives "Market" data/quotes all the time (never ending loop) from some server side (distant one).
i am dividing the data in to chunks so i ...

6. Is there any performance difference between StringBuilder.append and assigning value to StringBuilder in java    stackoverflow.com

I have a StringBuilder a. I have to append a's content to StringBuilder b. If b is null, then assign b=a, otherwise b.append(a.toString()). Is there any performance difference on checking if ...

7. when to use StringBuilder in java    stackoverflow.com

It is supposed to be generally preferable to use a StringBuilder for String concatenation in Java. Is it always the case? What i mean is :

Is the overhead of creating a ...

8. String concatenation into StringBuilder java    stackoverflow.com

I have a legacy Java file which uses String concatenation to build huge String objects.Its a serious performance issue.Is there a method as such which does the following

String test="I am a ...

9. StringBuilder append vs +    stackoverflow.com

What is the difference between these two lines?

stringBuilder.append("Text " + counter + " more text");
stringBuilder.append("Text ").append(counter).append(" more text");