Will Nashorn facilitate Gradle being used for more web application assembly and test tasks, without using Node?

KARR, DAVID dk068x at att.com
Thu Dec 25 16:03:10 UTC 2014

Gradle already mitigates the startup time problem with the Gradle Daemon, so typical client invocations will be faster than without it.

From: Benjamin Sieffert [mailto:benjamin.sieffert at metrigo.de]
Sent: Thursday, December 25, 2014 7:44 AM
Cc: nashorn-dev at openjdk.java.net
Subject: Re: Will Nashorn facilitate Gradle being used for more web application assembly and test tasks, without using Node?

A problem with JVM-based components being used in a tool-like manner is the relatively huge cost associated with just starting the JVM.
E.g. if I start a JRuby-console ("irb"), it takes 2-3 seconds, whereas a MRI console basically opens instantly. Even with the work being put into reducing
nashorn's own warm-up time, the JVM's share will remain. An approach here seems to be to have one JVM running at all times and then relegating the
invocations of your tools to it. Nailgun is an implementation of this recommended by the JRuby team. But such an approach certainly brings its own
share of problems. In the end, I think that with the JIT, the JVM's very promise has always been that getting prime performance on it requires your
application to be a bit on the longer-lasting side. Otherwise, AOT optimized code will just be plain faster. And with most commandline tools, I feel,
invocation speed means a lot.

On 24 December 2014 at 19:02, KARR, DAVID <dk068x at att.com<mailto:dk068x at att.com>> wrote:
Nashorn and Avatar are interesting to me, but not personally as much for the ability to write standalone or server-based JavaScript applications.

I see Node.js being primarily used in two different ways.  It is used to write those standalone and server-based JavaScript applications, but it is also used entirely in the building and testing process of web applications, primarily with the Karma, Bower, and Grunt Node modules. I imagine there are other Node modules like that that are primarily used as a tool, not as a component in a custom Node.js application.

You might consider this a "niche" application, but I'm primarily interested to see whether Nashorn will be able to make it easier to use Gradle to build web applications and run JavaScript unit tests, without involving Node.js.

Benjamin Sieffert
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