extremely slow JavaScript to Java-applet calls



Core Graveyard
Java: OJI
15 years ago
7 years ago


(Reporter: Alexey Gaidukov, Assigned: Joshua Xia)


Windows 2000

Firefox Tracking Flags

(Not tracked)




15 years ago
User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.0; ru-RU; rv:1.2.1) Gecko/20021123
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.0; ru-RU; rv:1.2.1) Gecko/20021123

the test.html file

function testfun() {
	var applet = document.getElementById("test");	// Mozilla version
//	var applet = test;                           // IE vesrion
	var longValue = applet.getLong();
	var beginTime = new Date;
	for(var i=0; i < 10000; i++) {
		longValue = applet.getLong();
	var endTime = new Date;
	alert("Processing time:\n"
	   + "begin: " + beginTime + "\n"
	   + "end:" + endTime + "\n");
		<applet codebase="file:///C:/"		// set yours codebase
		<input type=button onclick="testfun()" value="Click me">

the test.java file

import java.awt.*;
import java.applet.*;
import java.lang.*;

final public class test extends Applet
	static int value = 1000*1000*1000;
	public void paint(Graphics g) 
		g.drawString("All right", 50, 100);
	public int getLong() {
		return value;
	public void setLong(int v) {
		value = v-1;

Reproducible: Always

Steps to Reproduce:
1. Store test.html and test.java files from the details section to your local HDD.
2. Compile test.java file
3. Change applet's codebase to your location in the test.html file
4. Run test.html in Mozilla. Wait while applet is starting. Click the button. 
To start the test in IE comment the line 5 and uncomment the line 6 in the file

See the great difference in the performance!!!

Actual Results:  
JavaScript to Java-applet calls in Mozilla 1.2.1 up to 30 times slower than
JScript to Java calls in IE 6.0. JavaScript to Java-applet calls in Mozilla 1.3
beta up to 4 times slower than in Mozilla 1.2.1.

Expected Results:  
Much faster calls of Java-applet functions from JavaScript.
Assignee: asa → rogerl
Component: Browser-General → Live Connect
QA Contact: asa → pschwartau

Comment 2

15 years ago
---> OJI
Assignee: rogerl → joshua.xia
Component: Live Connect → OJI
QA Contact: pschwartau → petersen
Summary: extremely slow javaScript to Java-applet calls → extremely slow JavaScript to Java-applet calls

Comment 3

15 years ago
Mozilla 1.3final perform this test up to 3 times faster than 1.2.1. But it is
still much slower than IE 6.0 (near 10 times)!!!

Comment 4

14 years ago
theClass = java.lang.Class.forName("java.lang.String");
array = java.lang.reflect.Array.newInstance(theClass, 10000);
var javaString = new java.lang.String("Hello world!");

for(i = 0; i < 10000; i++) {
  array[i] = javaString;

for(i = 0; i < 10000; i++) {

Example1 performs up to 10 times faster than example2. Why? Is it Java plugin
bug? JRE 1.4.2_01.

Comment 5

14 years ago
I don't know a lot about JavaScript/Java, but could this be a duplicate of Bug

Comment 6

14 years ago
The first call to an applet from JS takes some seconds. Next calls are faster 
but there are much slower then the same calls from MS IE to Java. This is not 
the same bug. Calls to JRE 1.5 beta 1 is a little bit faster then calls to JRE 
This is an automated message, with ID "auto-resolve01".

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Last Resolved: 12 years ago
Resolution: --- → EXPIRED


7 years ago
Component: Java: OJI → Java: OJI
Product: Core → Core Graveyard
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