Time Combined Log Analyzer

analyzer.js

var stream = require('fs-base').open(system.args[2]);
var stats = {}, paths = [], line;

while(line = stream.readLine()) {
  try {
	  var l = line.substr(line.indexOf('"'));
	  l = l.split(/"([^"]+)"/);
	  var url = l[1].split(' ')[1].substr(1).split('/');
	  url = url.concat(url.pop().split('?'));
	  var time = +l[6].trim();
	  if(isNaN(time)) throw new Error('NaN ' + l[6].trim());
	  var component, s = stats, p = '';
	  while(component = url.shift()) {
		  p = p + '/' + component;
		  if(!s[component]) {
			  paths.push(s[component] = {time: 0, max: 0, count: 0, path: p, nodes: {}});
		  }
		  s = s[component];
		  s.time += time;
		  s.count ++;
		  s.max = time > s.max ? time : s.max;
		  s = s.nodes;	
	  }
  } catch(e) {
  }
}

paths.forEach(function(e) {
  e.average = e.time / e.count;
});

var cb = system.args[4] || 'time'; 

var result = paths.sort(function(a, b) {
	if(a[cb] < b[cb]) return 1;
	if(a[cb] > b[cb]) return -1;
	return 0;
}).map(function(e) {
	return e.time.toFixed(3) + ' ' + e.path + ' ' + e.count + ' ' + e.max.toFixed(3) + ' ' + e.average.toFixed(3);
});

for(var l = system.args[3] || result.length; l --;) {
  console.log(result.shift());
}