String interning (WAS: SAX2/Java: Towards a final form)

David Megginson david at
Tue Jan 18 20:17:51 GMT 2000

Tyler Baker <tyler at> writes:

> As you can see an identity test is done right off the bat so if you make a call like this:
> if (foo.equals("x")) {
> }
> And foo == "x", then your only additional overhead to a straight identity test is the
> dynamic method invocation of String.equals().

Only if the strings are equal -- if you're in a long switch statement, 
most of them won't be equal, and the overhead will be much more than
the function call.

All the best,


David Megginson                 david at

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