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Message:

Exceptions and Performance

Posted by Dave Hunter on July 06, 1999 at 5:53 AM

> For me, this whole thing stemmed from reconstituting Objects after serialization. Some data members were declared transient (or didn't implement Serializable). So I was faced with the decision of cluttering up constructors with "initialization" methods, recreating the data members on readObject (directly or using the same "initialization" methods), wrapping their usage in a try/catch clause (looking for NullPointerExceptions) or just checking to see if the memebers != null. I opted for the try/catch (for better or worse) since the members really have one time that they were actually == null. So I guess the question is, "If I know that 99.999% of the time I will not throw an Exception, what is the cost of a try/catch clause?"
The method doit3() is of course more eficient than doit 1,2.
The cluttering up of a Constructor is probably preferable(better Performance) to cluttering up an entire class.
You could use the lazy inititialization idiom to reduce the clutter.

class MyClass {
MyObject myObj;
public MyClass(){
this.myObj = new MyObject();
//+"initialization clutter"
}

void doit3() {
myObj.process();
}