var path = require('path'),

fs = require('fs');

var less = require('../lib/less-node'); var file = path.join(__dirname, 'benchmark.less');

if (process.argv) { file = path.join(process.cwd(), process.argv) }

fs.readFile(file, 'utf8', function (e, data) {

var start, end, total;

console.log("Benchmarking...\n", path.basename(file) + " (" +
         parseInt(data.length / 1024) + " KB)", "");

var benchMarkData = [];

var totalruns = 100;
var ignoreruns = 30;

for(var i = 0; i < totalruns; i++) {
    start = new Date();

    less.render(data, function (err) {
        end = new Date();

        benchMarkData.push(end - start);

        if (err) {
            less.writeError(err);
            process.exit(3);
        }
    });
}

var totalTime = 0;
var mintime = Infinity;
var maxtime = 0;
for(var i = ignoreruns; i < totalruns; i++) {
    totalTime += benchMarkData[i];
    mintime = Math.min(mintime, benchMarkData[i]);
    maxtime = Math.max(maxtime, benchMarkData[i]);
}
var avgtime = totalTime / (totalruns - ignoreruns);
var variation = maxtime - mintime;
var variationperc = (variation / avgtime) * 100;

console.log("Min. Time: "+mintime + " ms");
console.log("Max. Time: "+maxtime + " ms");
console.log("Total Average Time: " + avgtime + " ms (" +
    parseInt(1000 / avgtime *
    data.length / 1024) + " KB\/s)");
console.log("+/- " + variationperc + "%");

});