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

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

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*