indent = function (n) {
                var arr,
                    res = mem[n];

                if (typeof res === 'undefined') {
                    arr = [];
                    arr.length = (4 * n) + 1;
                    mem[n] = res = arr.join(' ');
                }

                return res;
            }
Pretty print results
@param {Object} obj the Object with YSlow results
@return {String} the results in plain text (pretty printed)