carto/benchmark/less-benchmark.js

var path = require('path'),
    fs = require('fs'),
    sys = require('sys');

require.paths.unshift(__dirname, path.join(__dirname, '..'));

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

fs.stat(file, function (e, stats) {
    fs.open(file, process.O_RDONLY, stats.mode, function (e, fd) {
        fs.read(fd, stats.size, 0, "utf8", function (e, data) {
            var tree, css, start, end, total;

            sys.puts("Bechmarking...\n", path.basename(file) + " (" +
                     parseInt(data.length / 1024) + " KB)", "");

            start = new(Date);
            tree = less.parser.parse(data);
            end = new(Date);

            if (less.parser.error) {
                process.stdio.writeError(less.parser.error.message);
                process.exit(3);
            }

            total = end - start;

            sys.puts("Parsing: " +
                     total + " ms (" +
                     parseInt(1000 / total *
                     data.length / 1024) + " KB\/s)");

            start = new(Date);
            css = tree.toCSS([], {frames: []});
            end = new(Date);

            sys.puts("Generation: " + (end - start) + " ms (" +
                     parseInt(1000 / (end - start) *
                     data.length / 1024) + " KB\/s)");

            total += end - start;

            sys.puts("Total: " + total + "ms (" +
                     parseInt(1000 / total * data.length / 1024) + " KB/s)");
        });
    });
});