var showMem = function() {             var mem = process.memoryUsage();             var format = function(bytes) {                  return (bytes/1024/1024).toFixed(2)+'MB';             };             console.log('Process: heapTotal '+format(mem.heapTotal) + ' heapUsed ' + format(mem.heapUsed) + ' rss ' + format(mem.rss));             console.log('----------------------------------------');        };                var useMem = function () {             var size = 20*1024*1024;             var arr = new Array(size);             for (var i=0;i<size;i++) {                  arr[i] = 0;             }             return arr;        };                var total = [];                for (var j=0;j<15;j++) {             showMem();             total.push(useMem());        }        showMem();