performance « String « Javascript Data Type Q&A

1. Javascript String concatenation faster than this example?    stackoverflow.com

I have to concatenate a bunch of Strings in Javascript and am searching for the fastest way to do so. Let's assume that the Javascript has to create a large XML-"file" ...

2. Efficient Javascript String Replacement    stackoverflow.com

Hey there, I've got a block of HTML that I'm going to be using repeatedly (at various times during a users visit, not at once). I think that the best ...

3. JavaScript: String Concatenation slow performance? Array.join('')?    stackoverflow.com

I've read that if I have a for loop, I should not use string concation because it's slow. Such as:

for (i=0;i<10000000;i++) {
    str += 'a';
}

4. Javascript string performance comparison    stackoverflow.com

I am working on a jQuery/Javascript app where performance is really important. What would be the fastest way in getting a number value from the following code? Is the same execution time ...

5. How inefficient is String concatenation in Javascript?    stackoverflow.com

Such as

var myName = 'Bob';
myName += ' is a good name';

6. What's the difference between .substr(0,1) or .charAt(0)?    stackoverflow.com

We were wondering in this thread if there was a real difference between the use of .substr(0,1) and the use of .charAt(0) when you want to get the first character ...

7. Why is string concatenation faster than array join?    stackoverflow.com

Today, I read this thread about speed of string concatenation. Surprisingly, string concatenation was the winner:

http://jsperf.com/array-join-vs-string-connect http://jsperf.com/join-concat/2

8. queuing DOM changes in a big string: Sensible? Safe?    stackoverflow.com

I am making a simple Javascript game, so frequently change page elements, and this involves multiple function calls. This article seems to suggest queuing up any DOM changes as a string ...