DeltaScriptProfiler.java

/* --------------------------------------------------------- *
 *    __________    D E L T A S C R I P T                    *
 *   (_________()                                            *
 *    /  ===   /   - A fast, dynamic scripting language      *
 *   |  ==    |    - Version 4.13.11.0                       *
 *   /  ===   /    - Developed by Adam R. Nelson             *
 *  |  =  =  |     - 2011-2013                               *
 *  /  ===   /     - Distributed under GNU LGPL v3           *
 * (________()     - http://github.com/ar-nelson/deltascript *
 *                                                           *
 * --------------------------------------------------------- */

package com.sector91.delta.script.profiling;

import org.mozilla.javascript.Context;
import org.mozilla.javascript.Script;
import org.mozilla.javascript.Scriptable;

import com.sector91.delta.script.*;
import com.sector91.delta.script.instrs.DSInstr;
import com.sector91.delta.script.objects.DS_Scope;
import com.sector91.delta.script.parser.DScriptParserException;

public class DeltaScriptProfiler
{
    static Script[] jsScripts = null;
    static DSInstr[] dsScripts = null;
    
    public static void main(String[] args) throws Exception
    {
        // Run each test once to avoid initialization lag.
        System.out.println("Initializing...");
        testJS(); testDS(); System.gc(); System.gc();
        
        int times = 24;
        
        long jsTotal = 0, dsTotal = 0;

        System.out.println("Testing...");
        for (int i=0; i<times; i++)
        {
            long dsTime = testDS();
            System.out.println("DeltaScript Run " + (i+1) + ": " + dsTime + "ms");
            dsTotal += dsTime;
            long jsTime = testJS();
            System.out.println("JavaScript Run " + (i+1) + ": " + jsTime + "ms");
            jsTotal += jsTime;
        }
        System.out.println("------------------------------------------------");
        System.out.println("RESULTS: ");
        System.out.println("Average JavaScript time:  " + (jsTotal/times) + "ms");
        System.out.println("Average DeltaScript time: " + (dsTotal/times) + "ms");
        System.out.println("JS/DS Performance Ratio:  " + ((float)jsTotal/(float)dsTotal));
    }
    
    private static long testJS()
    {
        Context cx = Context.enter();
        Scriptable jsScope = cx.initStandardObjects();
        if (jsScripts == null)
            jsScripts = new Script[] {
                cx.compileString("var a=0; for (i=0; i<1000000; i++) {a++;}", "<cmd>", 0, null),
                cx.compileString("var a=1; for (i=0; i<1000000; i++) {if (a==i) {a--;}}", "<cmd>", 0, null),
                cx.compileString("var arr = []; for (i=0; i<100000; i++) {arr.push(i);}", "<cmd>", 0, null),
                cx.compileString("var a1 = []; for (i=0; i<500; i++) {var a2 = []; for (j=0; j<500; j++) {a2.push(j)} a1.push(a2);}", "<cmd>", 0, null),
                cx.compileString("var a=0, f=function() {a++}; for(i=0;i<1000000; i++) {f();}", "<cmd>", 0, null),
        };
        long mark = System.currentTimeMillis();
        for (Script s : jsScripts)
            s.exec(cx, jsScope);
        long time = System.currentTimeMillis()-mark;
        return time;
    }
    
    private static long testDS() throws DScriptErr, DScriptParserException
    {
        DScriptContext context = new DScriptContext();
        DS_Scope scope = context.createScope();
        if (dsScripts == null)
            dsScripts = new DSInstr[] {
                DeltaScript.compile("a=0; loop i from 0 to 1000000; a++; xl", context),
                DeltaScript.compile("a=1; loop i from 0 to 1000000; if a==i, a--, xi; xl", context),
                DeltaScript.compile("arr=..list(); loop i from 0 to 100000; arr.push(i); xl", context),
                DeltaScript.compile("a1=..list(); loop i from 0 to 500; a2=..list(); loop j from 0 to 500, a2.push(j), xl; a1.push(a2); xl", context),
                DeltaScript.compile("a=0; f=-> a++; loop i from 0 to 1000000, f(), xl", context),
        };
        long mark = System.currentTimeMillis();
        for (DSInstr s : dsScripts)
            DeltaScript.exec(s, scope, context);
        long time = System.currentTimeMillis()-mark;
        return time;
    }
}