Re: [Jmol-developers] Speeding up Jmol-SwingJS and JSmol loading by bundling

[Robert H. <ha...@st...>]

Mark, I checked in build-core.xml. If you run that, it will condense 623
files into site/swingjs/j2s/core/core_jmol.z.js (6.6 MB/1.5 MB transferred
by server-side GZip). Then run build-site.xml, and
__JmolApplet_applet_core.html will be transferred into /site/ from
/site-resources. The only difference between these two is the line for
Info.core:


*  core: "_jmol",*

This loaded for me from
https://chemapps.stolaf.edu/jmol/swingjs/site/__JmolApplet_applet_core.html
in 1.4 sec (Firefox)/1.6 sec (Chrome) with the cache disabled, or 0.73/0.36
cached. I think this is about as good as we can expect.

[image: image.png]





On Wed, Dec 9, 2020 at 9:27 PM Robert Hanson <ha...@st...> wrote:

>
>
> On Wed, Dec 9, 2020 at 6:25 PM Mark Perri <pe...@so...> wrote:
>
>> Hi Bob,
>>
>> I've been experimenting with bundling the Jmol-SwingJS and JSmol files to
>> speed up loading.  Jmol-SwingJS took 33 seconds to load because it loads
>> each function dynamically, and using the menu took another 10 seconds to
>> load.
>>
>>
> Oh, right. Don't be too concerned about compression. This is all just
> development-only. Other huge projects load in around 2-3 seconds once we
> build the core files.
>
>
>> After getting a list of all the swingjs files that it dynamically loads
>> (681) I concatenated them into one big swingjs.js file (4.9M minimized).  I
>> couldn't load this in a script tag, I had to wait until I initialized the
>> applet.  The easiest way to time it correctly was to replace
>> swingjs/j2s/javax/swing/Japplet.js with this file.  Using this bundle hack
>> it only took 2.1 seconds to load the applet and the menus are ready to go
>> when you right click.  (it also loads the molecular orbital packages).
>>
>
> That's not actually how it is done. Let me do one for you so you can see
> how it works.
>
> You can see the result here:
>> https://beta.chemcompute.org/site/__JmolApplet_applet.html
>>
>> I did the same with JSmol (only 40 files) and replaced
>> j2s/core/corejmol.z.js with a 2.3 M file.  It loads in about half the time
>> (3 seconds instead of 6) and preloads a couple of functions I use.
>>
>> Are there any downsides to preloading everything like this?  I tried
>> looking in the swingjs code and couldn't figure out where it could be
>> automated (I haven't looked in the JSmol transpiler at all).
>>
>>
> *Bob*
>


-- 
Robert M. Hanson
Professor of Chemistry
St. Olaf College
Northfield, MN
http://www.stolaf.edu/people/hansonr


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