22 июн. 2006 г. · I agree that instanceof is almost certainly faster or at worst equal to any alternative. Moreover, forgetting about performance, using Strings would mean ...

19 июн. 2001 г. · You should definately use instanceOf. There are two reasons for this. 1) Exceptions should be used for exceptional conditions. Not simply alternative path ...

4 янв. 2010 г. · I have heard that instanceof operator in java is a performance issue,. Is it true for Javascript too (IE6,IE7,IE8,FF,Chrome,safari,etc.)?

23 сент. 2009 г. · Your compiled Java code has loads of instanceof operations, even though you didnt put them in. EVERY reference assignment that is at all in ...

13 июл. 2004 г. · The truth is, in any event, that static methods will be vaguely faster, not slower, than instance methods.

21 сент. 2011 г. · Hi Every one, I am facing the problem with instanceof operator. Actually I want to check an object for instance of more than 20 classes.

19 нояб. 2004 г. · Hi, Suppose I have a method that makes a complex computation. Do you advice to mark this method as static looking from the performance ...

In your two examples, the one using instanceof is clearly to be preferred. If you could determine the type of an object faster than instanceof, don't you think ...

15 июл. 2003 г. · The "instanceof" is most likely faster, as it's implemented in one bytecode. But it also has a different meaning.

23 февр. 2001 г. · 1. How expensive is it? 2. Do JVMs typically do it using instanceOf()? 3. Is there a cost difference between upcasting and downcasting? If so, ...