repeat.js

repeat.js

var exec = require('child_process').exec;
var cmd = process.argv[2];

console.log(' - - - ');
console.log('Running the following command repeatedly:');
console.log(cmd);

var count = 0;
var averageSumTime = 0;
var averageTime = 0;

function tick() {
    count++;
    var paddedCount = "0000000000" + count;
    paddedCount = paddedCount.substr(paddedCount.length - 10);

    var start = new Date().getTime();
    exec(cmd, function (error, stdout, stderr) {
        var end = new Date().getTime();
        var time = end - start;

        var message = 'Success';
        if (error) {
            message = stderr;
        }
        averageSumTime += time;
        averageTime = Math.round(averageSumTime / count);
        console.log(paddedCount, time + 'ms', message, '(' + averageTime + 'ms average)');
        if (!error) {
            tick()
        }
    });
}

tick();