thread_usage_test.js

var sys = require('sys')
    , http = require("http");

var client = http.createClient('80', 'www.google.com');

var request, ctr=0, delay=100;

setTimeout(function() {
    console.error('INT:\n%j', process.ioThreadUsage());
    if(ctr<20) setTimeout(arguments.callee, 10);
}, 10);
setTimeout(function() {
    var id = ctr;
    console.error('LOOP %d:\n%j', ctr, process.ioThreadUsage());
    request = client.request('GET', '/'
                   , {'host': 'www.google.com'});
    request.addListener('response', function (response) {
        console.error('RES %d:\n%j', ctr, process.ioThreadUsage());
        response.setEncoding('utf8');
        response.addListener('data', function (chunk) {
            console.error('BODY %d:\n%j', ctr, process.ioThreadUsage());
        });
    });
    request.end();
    if(ctr<20) setTimeout(arguments.callee, delay);
    ctr++;
}, delay);