AsciiDoc benchmark for JDK 1.6 and JDK 1.8

benchmark.java

import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import javax.script.ScriptException;
import java.io.FileReader;
import java.io.IOException;

public class Main {
  public static void main(String[] args) throws IOException, ScriptException {

    ScriptEngineManager manager = new ScriptEngineManager();
    ScriptEngine engine = manager.getEngineByName("nashorn");

    if(engine != null) {
      System.out.println("Using Java 8 Nashorn");
    } else {
      engine = manager.getEngineByName ("js");
      System.out.println("Using Java 6 Javascript");
    }

    long beginTime = System.currentTimeMillis();

    FileReader opal = new FileReader("src/main/java/org/asciidoc/intellij/main/opal.js");
    FileReader asciidoctor = new FileReader("src/main/java/org/asciidoc/intellij/main/asciidoctor.js");
    engine.eval(opal);
    engine.eval(asciidoctor);

    for(int i =0; i < 10; i ++) {
      System.out.println(engine.eval("asciidoctorDocument = Opal.Asciidoctor.$load(\"= Real-time collaborative editor for AsciiDoc\\nMaxime Greau \\x3Chttps:\\x2F\\x2Fgithub.com\\x2Fmgreau[@mgreau]\\x3E\\nv0.1.0.alpha4, March 16, 2014\\n:imagesdir: https:\\x2F\\x2Fraw.github.com\\x2Fmgreau\\x2Fwhen-websocket-met-asciidoctor\\x2Fmaster\\x2Fdoc\\x2Fimg\\x2F\\n:toc:\\n:toclevels: 3\\n:idseparator: -\\n:online-demo: http:\\x2F\\x2Fwildfly-mgreau.rhcloud.com\\x2Fad-editor\\n:milestones: https:\\x2F\\x2Fgithub.com\\x2Fmgreau\\x2Fwhen-websocket-met-asciidoctor\\x2Fissues\\x2Fmilestones\\n:issues: https:\\x2F\\x2Fgithub.com\\x2Fmgreau\\x2Fwhen-websocket-met-asciidoctor\\x2Fissues\\n:asciidoctor-url: http:\\x2F\\x2Fasciidoctor.org\\n:asciidoctorj-url: https:\\x2F\\x2Fgithub.com\\x2Fasciidoctor\\x2Fasciidoctorj\\n:asciidoctorjs-url: https:\\x2F\\x2Fgithub.com\\x2Fasciidoctor\\x2Fasciidoctor.js\\n:asciidoctor-backends-url: https:\\x2F\\x2Fgithub.com\\x2Fasciidoctor\\x2Fasciidoctor-backends\\n:wildfly-url: http:\\x2F\\x2Fdownload.jboss.org\\x2Fwildfly\\x2F8.0.0.Final\\x2Fwildfly-8.0.0.Final.zip\\n:demo-url: https:\\x2F\\x2Fraw.github.com\\x2Fmgreau\\x2Fwhen-websocket-met-asciidoctor\\x2Fmaster\\x2Fdoc\\x2Fdemo\\x2F\\n\\n== Overview\\n\\n.This project gives you the possibility to *work on the same AsciiDoc file with a team and see the rendering in realtime*.\\n\\nIt\\'s based on the {asciidoctor-url}[Asciidoctor project] thanks to : \\n\\n* the Java API provided by {asciidoctorj-url}[AsciidoctorJ]\\n* the Javascript libraries provided by {asciidoctorjs-url}[Asciidoctor.js]\\n\\n== How to test it ?\\n\\n. *Install it* quickly (0.1.0-alpha3)\\n   \\n   curl https:\\x2F\\x2Fraw.github.com\\x2Fmgreau\\x2Fwhen-websocket-met-asciidoctor\\x2Fmaster\\x2Finstall.sh | bash\\n   \\n. or *try it online* at {online-demo} (running on OpenShift).\\n. or clone the project and follow the instructions below\\n\\n\\n[[collaborative-editor]]\\n.Demo Collaborative Editor\\nimage::..\\x2Fdemo\\x2Fcollaborative-editor.gif[Collaborative-editor, 600, link=\\\"{demo-url}collaborative-editor.gif\\\"]\\n\\nIf you have an existing asciidoc file, you can drag and drop this file to the editor :\\n\\n[[drag-drop]]\\n.Drag and drop feature\\nimage::ad-editor-dragdrop.png[Drag and drop feature, 600, link=\\\"{demo-url}ad-editor-dragdrop.png\\\"]\\n\\nYou can also work on an offline mode with just your browser :\\n\\n[[offline]]\\n.Offline mode feature\\nimage::ad-editor-offline.png[Offline mode feature, 600, link=\\\"{imagesdir}ad-editor-offline.png\\\"]\\n\\n== 0.1.0-alpha4-SNAPSHOT (dev in progress)\\n\\n* *+dzSlides backend+* : you can work on your slides for a presentation !\\n\\n\\n== 0.1.0-alpha3 - new features\\n\\n* +*Full offline mode+* : if you are not connected to the server by WebScoket protocol, then the\\nrendering view is still working in real-time with the Javascript project asciidoctor.js\\n* +*Drag and Drop*+ : you can *drag a AsciiDoc file* from your laptop and *drop it into the editor* and the content of the file\\nwill be loaded into the editor\\n\\n== 0.1.0-alpha2 new features\\n\\n* Create a *new space* OR *join others author* with a spaceID\\n* *Browser storage* with HTML5 IndexedDB for backup (save and load AsciiDoc source)\\n* *Fullscreen mode* for HTML5 preview\\n* Improved UI Design\\n* HTML5 preview in realtime : \\n** *each time the AsciiDoc source is changed* if you have clicked on +Render On Change+\\n** *each time you press \\\"Alt+R\\\"* if you have clicked on +Render On Alt+R+ button\\n* *Patch feature* :\\n** if an other author send a version, you can click on +Compute Diff+ button to see differences between your adoc file and the last adoc file\\n** if the patch seems ok, click on +Apply Patch+ and you adoc source will be up to date\\n* *Load the last AsciiDoc source* send by an other author\\n\\n[diff feature]\\n.Compute diff feature\\nimage::ad-editor-diff.png[Diff feature example, 600]\\n\\n[patch feature]\\n.patch feature\\nimage::ad-editor-patch.png[Patch feature example, 600]\\n\\n== Changelog\\n\\nYou can read all changes between each release in the link:CHANGELOG.adoc[changelog file].\\n\\n== Roadmap\\n\\nA lot of cool features are planned :) You can read all {issues}[open and closed issues] and {milestones}[milestones]\\n\\n== [DEV MODE] Install on your laptop\\n\\n[IMPORTANT]\\n.Prerequisites\\n====\\n* JDK 7\\n* Apache Maven 3.1\\n====\\n\\n. Clone or download this github project (*+$APP_HOME+*)\\n\\n. Installing the Java EE 7 Compliance App server  \\n.. Download {wildfly-url}[WildFly 8.0.0-Final] (*+$JBOSS_HOME+*)\\n.. Then you need to deploy the link:module\\x2FREADME.adoc[Asciidoctor module] into your WildFly app server\\n.. For the slides features, you have to install {asciidoctor-backends-url}[asciidoctor-backends] into +$JBOSS_HOME\\x2Fstandalone\\x2Fdatas+\\n\\n. Installing Bower\\n.. Bower depends on Node and npm. It\\'s installed globally using npm:\\n  \\n  npm install -g bower\\n  \\n.. Installing the bower dependencies needed by this app (into +$APP_HOME\\x2Fsrc\\x2Fmain\\x2Fwebapp\\x2Flibs+)\\n\\n  cd $APP_HOME\\n  bower install\\n  \\n. Build the WAR and test it into WildFly AS with maven\\x2Farquillian : \\n\\n   .. if the environement variable +$JBOSS_HOME+ is set :\\n\\n   mvn clean package -Pwildfly-managed-arquillian\\n\\n   .. if you haven\\'t set the +$JBOSS_HOME+ env variable :\\n\\n   mvn clean package -Pwildfly-managed-arquillian -DserverRoot=\\x3Cpath_to_the_server\\x3E\\n   \\n.  Deploy the app automatically with maven : \\n\\n  .. if the app server is started\\n  \\n  mvn wildfly:deploy -Dmaven.test.skip=true\\n  \\n  .. if the app server isn\\'t started\\n  \\n  mvn wildfly:run -Dmaven.test.skip=true -Djboss-as.home=\\x3Cpath_to_the_server\\x3E\\n\\n. Launch your browser and enjoy :)\\n\\n   *  http:\\x2F\\x2Flocalhost:8080\\x2Fad-editor\\n\\n\\n== Technology used\\n\\n* Asciidoctor project\\n** AsciidoctorJ 0.1.4\\n** asciidocor.js\\n* Java EE 7 \\n** CDI 1.1\\n** WebSocket 1.0\\n** JSON-P 1.0\\n** EJB 3.2\\n* Web Client\\n** AngularJS 1.2.11\\n** Ace Editor\\n** Bootstrap 3.0\\n* Tests\\n** JUnit 4.8\\n** Arquillian 1.1.2\\n* Java EE 7 Compliance App server\\n\\n\", Opal.hash2(['attributes'], {'attributes': 'showtitle toc2 showauthor icons=font@'}));\n" +
          "asciidoctorDocument.$render();\n"));
    }

    long endTime = System.currentTimeMillis();

    System.out.println("Rendering took " + (endTime -beginTime) + " ms");
  }
}

Small remark: when using Java 6, you'll need to do a s/char/somethingElse/g on the opal.js

On a Mac (2.6 Ghz, i7, 16GB with MacOS 10.9.5)

Using 10 iterations:

// Rendering took 8255 ms using Java 6
// Rendering took 12174 ms using Java 8

Using 100 iterations:

// Rendering took 53567 ms using Java 8
// Rendering took 38389 ms using Java 6

Actually, that char bug is fixed in the latest Asciidoctor.js, but if you hold out for a few more days we'll have an even more stable version available (1.5.2).