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browserJsExecutor.js
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140 lines (92 loc) · 3.35 KB
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/**
* Created by marija on 26.06.15.
*/
var express = require('express');
var app = express();
var fs = require('fs');
var path = require('path');
var bodyParser = require('body-parser');
var child = require('child_process');
var ss = require('simple-statistics');
var psTree = require('ps-tree');
var a1 = [];
var a2 = [];
var con_coef = 1.96;
var browser = process.argv[2];
var bugPath = process.argv[3];
var VM_invocations=process.argv[4];
var command1 = browser + ' http://localhost:8081/' + bugPath + 'v_before.html';
var command2 = browser + ' http://localhost:8081/' + bugPath + 'v_after.html';
console.log(command1);
console.log(command2);
var running_child = null;
app.set('port', process.env.PORT || 8000);
var server = app.listen(8081, function () {
console.log('Listening on port %d', server.address().port);
warmUpAndTest(command1, a1, function () {
var mean1 = parseFloat(ss.mean(a1));
var st_dev1 = ss.standard_deviation(a1);
console.log('mean 1: ' + mean1);
warmUpAndTest(command2, a2, function () {
var mean2 = parseFloat(ss.mean(a2));
var st_dev2 = ss.standard_deviation(a2);
console.log('mean 2: ' + mean2);
var results = compare2Alternatives(mean1, mean2, st_dev1, st_dev2, con_coef, 5);
if (results[0] <= 0 && results[1] >= 0) {
console.log('the performance difference is not statistically significant');
} else {
console.log('the performance difference is statistically significant');
var diff = 100 - (mean2 * 100) / mean1;
console.log('performance gain is: ' + diff + '%');
}
server.close();
});
});
});
function warmUpAndTest(command, array, f) {
running_child = child.exec(command, function (error, stdout, stderr) {
if (array.length<VM_invocations) {
setTimeout(warmUpAndTest.bind(null, command,array, f), 0);
} else {
f();
}
}, 1000);
};
function compare2Alternatives(m1, m2, s1, s2, con_coef, N) {
var m = Math.abs(m1 - m2);
var s = Math.sqrt((Math.pow(s1, 2) + Math.pow(s2, 2)) / N);
var interval = [];
var lower = parseInt(m - con_coef * s);
var upper = parseInt(m + con_coef * s);
interval.push(lower);
interval.push(upper);
return interval;
}
var allowCrossDomain = function (req, res, next) {
res.header('Access-Control-Allow-Origin', '*');
res.header('Access-Control-Allow-Methods', 'GET,PUT,POST,DELETE');
res.header('Access-Control-Allow-Headers', 'Content-Type');
next();
}
app.use(express.static(path.join(__dirname, 'html')));
app.use('/clientIssues', express.static(__dirname + '/clientIssues'));
app.use('/clientServerIssues', express.static(__dirname + '/clientServerIssues'));
app.use(allowCrossDomain);
app.use(bodyParser.urlencoded({
extended: true
}));
app.use(bodyParser.json());
app.post('/', function (req, res) {
res.send('ok');
console.log('mean:' + req.body.mean);
if (req.body.mark === 0) {
a1.push(req.body.mean);
} else if (req.body.mark === 1) {
a2.push(req.body.mean);
}
setTimeout(psTree(running_child.pid, function (err, children) {
child.spawn('kill', ['-9'].concat(children.map(function (p) {
return p.PID
})))
}), 1000);
});