Hello,
I was reading the mailing list archive of classpath
(interrested, but no time to code:(
I saw the topic of using exceptions for error checking.
I have only one response: don't
It is terribly slow as the attached code shows. These are the
timings i've got (all times are in milliseconds):
(marcel@rincewind:0) ~/java> java Benchmark
Time= 1821
Time= 1681
Time= 1356
(marcel@rincewind:0) ~/java> java -Djava.compiler=tya Benchmark
TYA 0.7 (for J116) loaded. Copyright (c) 1997,98 The TYA Team
Contact The TYA Team via Albrecht Kleine <[EMAIL PROTECTED]>
Time= 1303
Time= 1307
Time= 165
The first two times use an exception for the error condition while
the last one uses an explicit check. Although a try/catch clause looks
like less work on the source-code level, the JVM must do a lot more
in this case. Therefore exceptions should only be used to the case their name
refers to: in exceptional cases.
Marcel Ammerlaan
ps. i'll be watching the list to see if any more optimalisations can be
applied as I've gotten rather sick of the speed of Java:)
--
I trust you trust in me to mistrust you
- Fish
