text: 'use strict';
  
  const util = require('util');
  const common = require('../common');
  
  const inputs = {
    'string': ['Hello, my name is %s', 'Fred'],
    'string-2': ['Hello, %s is my name', 'Fred'],
    'number': ['Hi, I was born in %d', 1989],
    'replace-object': ['An error occurred %j', { msg: 'This is an error' }],
    'unknown': ['hello %a', 'test'],
    'no-replace': [1, 2],
    'no-replace-2': ['foobar', 'yeah', 'mensch', 5],
    'only-objects': [{ msg: 'This is an error' }, { msg: 'This is an error' }],
    'many-%': ['replace%%%%s%%%%many%s%s%s', 'percent'],
  };
  
  const bench = common.createBenchmark(main, {
    n: [1e5],
    type: Object.keys(inputs)
  });
  
  function main({ n, type }) {
    // For testing, if supplied with an empty type, default to string.
    const [first, second] = inputs[type || 'string'];
  
    bench.start();
    for (var i = 0; i < n; i++) {
      util.format(first, second);
    }
    bench.end(n);
  }
  