Run results for: repeat

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2952.0 Safari/537.36

Browser: Chrome 57

Operating system: Mac OS X 10.11.6

Device Platform: Other

Date tested: 7 years ago

Test name	Executions per second
native repeat	2018526.6 Ops/sec
stupid repeatify	8.3 Ops/sec
repeatifyWithArrayAndJoin	12.2 Ops/sec
repeatifyWithNewArray	56.2 Ops/sec
repeatifyWithNewArrayAndExternalThrow	57.5 Ops/sec

Script Preparation code:

function repeatify(string, repetitions) {
   if (repetitions < 0 || repetitions === Infinity) {
      throw new RangeError('Invalid repetitions number');
   }
 
   let result = '';
 
   for (let i = 0; i < repetitions; i++) {
      result += string;
   }
 
   return result;
}

function repeatifyWithArrayAndJoin(string, repetitions) {
   if (repetitions < 0 || repetitions === Infinity) {
      throw new RangeError('Invalid repetitions number');
   }
 
   const result = [];
 
   for (let i = 0; i < repetitions; i++) {
      result.push(string);
   }
 
   return result.join('');
}

function repeatifyWithNewArray(string, repetitions) {
   if (repetitions < 0 || repetitions === Infinity) {
      throw new RangeError('Invalid repetitions number');
   }
  
   return new Array(repetitions).join(string);
}

function _checkRepeations(repetitions) {
	if (repetitions < 0 || repetitions === Infinity) {
      throw new RangeError('Invalid repetitions number');
   }
}

function repeatifyWithNewArrayAndExternalThrow(string, repetitions) {
   _checkRepeations(repetitions);
  
   return new Array(repetitions).join(string);
}

function repeatifyWithNewArrayAndExternalThrowWithProps(string, repetitions) {
   this.checkRepeations(repetitions);
  
   return new this.Array(repetitions).join(string);
}

var ctx = {
	checkRepeations: _checkRepeations,
  	Array: Array
}

repeatifyWithNewArrayAndExternalThrowWithProps = repeatifyWithNewArrayAndExternalThrowWithProps.bind(ctx);

var TEST_STRING = 'home, sweet home';
var COUNT = 1e6;

Tests:

native repeat
TEST_STRING.repeat(COUNT);
stupid repeatify
repeatify(TEST_STRING, COUNT);
repeatifyWithArrayAndJoin
repeatifyWithArrayAndJoin(TEST_STRING, COUNT);
repeatifyWithNewArray
repeatifyWithNewArray(TEST_STRING, COUNT);
repeatifyWithNewArrayAndExternalThrow
repeatifyWithNewArrayAndExternalThrow(TEST_STRING, COUNT);
repeatifyWithNewArrayAndExternalThrowWithProps
repeatifyWithNewArrayAndExternalThrowWithProps(TEST_STRING, COUNT);

native repeat

stupid repeatify

repeatifyWithArrayAndJoin

repeatifyWithNewArray

repeatifyWithNewArrayAndExternalThrow

repeatifyWithNewArrayAndExternalThrowWithProps