function toStringBench() {
    var me = this,
        error = me.error,
        hz = me.hz,
        id = me.id,
        stats = me.stats,
        size = stats.sample.length,
        pm = support.java ? '+/-' : '\xb1',
        result = me.name || (isNaN(id) ? id : '<Test #' + id + '>');

    if (error) {
      result += ': ' + join(error);
    } else {
      result += ' x ' + formatNumber(hz.toFixed(hz < 100 ? 2 : 0)) + ' ops/sec ' + pm +
        stats.rme.toFixed(2) + '% (' + size + ' run' + (size == 1 ? '' : 's') + ' sampled)';
    }
    return result;
  }
Displays relevant benchmark information when coerced to a string.

@name toString
@memberOf Benchmark
@returns {String} A string representation of the benchmark instance.