OK, now it's clear.
But why you did not specify earlier, that the JAR/not JAR issue affects
performance only in COMPILE time.
But the original question was (if you remember):
"Does having imports such as "import java.util.*" as opposed to "import
java.util.Vector" (when only the Vector class is used in the program) affect
the performance of a stand alone program?"
^^^^^^^^^^^^^^^^^^^^^^^
Radim
>
> At 08:38 AM 6/28/2002 +0200, Radim Tlusty wrote:
> >> At 03:20 PM 6/27/2002 +0200, Radim Tlusty wrote:
> >> >But the following description is misleading:
>
> >> >There is no relation between imports and storage of class files.
> >>
> >> ??? I'm not sure how your inference engine works.
> >> Who said there was a relationship?
> >
> >YOU.
>
> ????? I said "it used to be overhead in the old days..."
> Compilation took longer when your class path only has
> class files because there was a directory lookup involved.
> Jar files eliminated that issue a while ago.
>
> >You said, that there was overhead in "old days" before JAR
> files and today
> >with JAR files with manifest there should not be difference
> between "import
> >java.util.*" and "import java.util.Vector".
>
> >This for me means, that you see
> >relation between storage of classes and "import style" in
> source code. But
> >this is misleading.
>
> "see relation"??? "import style"??? I have no idea
> what you are saying. Please explain.
>
> >There is of course difference in speed with classes stored in
> JAR files or
> >standalone, but in loading time of class and not because of
> imports, as you
> >said (cite from your statement: "imports used to cause
> directory lookups,
> >which were slow").
>
> There *WAS* a difference (between import foo.* and import
> foo.MyClass)
> in compiling Java classes in the pre-jar days. It *USED* to take
> longer to compile Java classes when we only had *class* files and
> did not have *jar* files. This difference was due to the directory
> lookup and was particularly noticeable with large numbers
> of class files.
>
> If you want further clarification, send me direct email.
>
> Frank G.
> +======================================================================+
> | Crossroads Technologies Inc, 55 Broad Street, 28th Fl, NYC, NY 10004 |
> | Enterprise Java Engineering |
> | Email: [EMAIL PROTECTED] Web: www.CrossroadsTech.com |
> | Voice: 212-482-5280 x229 Fax: 212-482-5281 |
> +======================================================================+
>
>
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