You might want to give Pack200 a try; it's a Java classfile-aware compression
algorithm that can produce jars that are far more compact than e.g. if you were
to only gzip applet jars on their way out to your users. Lots of info about it
if you feel like googling.
Using a build from the current HEAD of Clojure, this:
pack200 clojure-1.3.0.pack.gz clojure-1.3.0-master-SNAPSHOT.jar
results in decent savings:
-rw-r--r-- 1 chas chas 835K Aug 26 22:57
clojure-1.3.0-master-SNAPSHOT-slim.jar
-rw-r--r-- 1 chas chas 3.2M Aug 26 22:57 clojure-1.3.0-master-SNAPSHOT.jar
-rw-r--r-- 1 chas chas 1.3M Aug 26 22:59 clojure-1.3.0.pack.gz
So, pack200 won't get you down to the slim jar's 835K, but it will shave off
~60%, and shouldn't impact startup time at all. Whether that's a good tradeoff
is up to you. :-)
- Chas
On Aug 25, 2011, at 4:26 AM, Terje Dahl wrote:
> My company (read: I) develop an web-based educational application (a
> language lab) implemented as a Java applet.
>
> I have spendt the summer porting it to Clojure. I am very happy with
> the results.
>
> Except: The download (and therefore the download-time) has increased
> dramatically, as I now include the clojure.jar as part of the
> download.
> (Actually, I repackage the content together with my application.)
>
> This, I fear is going to hit alot of the pupils hard, when 20 pupils
> at a time attempt to access the applet for the first time over the
> mediocre (at best) web-connections at their schools.
>
> Yes, I do manipulate the java applet cache-params.
> But There will always be a need for full downloads - both for first-
> time-users, and when I update the applet (frequently).
>
> My question:
> Is there anyway to reduce the size of the jar - drastically?
> Can I somehow remove most of the class-files generated from core.clj
> etc, and still have everything working properly?
> Tips/hints/suggestions?
>
>
> (Plug: See my open-source JS-embed code for Java applets:
> http://bitbucket.terjedahl.no/terjedahl/appletjs )
>
>
>
>
>
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