| Re: [jetty-users] Minify JavaScript and CSS with the help of Jetty? |
On Mon, 18 Jul 2016, at 07:15, Emmeran Seehuber wrote:
> For state of the art JS compression you need uglifyjs2 - you can run it
> on Rhino and I think even on Nashorn. But it is *way* to slow for on the
> fly compression. Uglifyjs2 is already slow when running on node.js. But
> its even slower in the JVM…
We use a servlet wrapper around the Google Closure Compiler for
_javascript_ minification, as well as on-the-fly conversion from ES6 to
ES5. It's not *fast*, really, but it's fast enough.
It's not entirely separate from private parts of our code, but if
anyone's interested I could post the important parts.
> In our project we migrated away from pure CSS to SASS. You can run the
> original (ruby) sass in jruby without problems. But it is also very slow…
> But there is sassc to rescue here. I´ve build a static sassc binary for
> Linux and Mac OS X, which I embedded in my java project and just extract
> to a temporary folder to convert sass->css on the fly. This is very fast
> and even gives a good compressed/minified CSS.
We used to use Ruby Sass with JRuby for a while, but it was very slow
and caused problems with the application under load. Now we just use
libsass from Node.js and ship the compiled files.
--
Carey Evans
carey@xxxxxxxxxxxxx
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