Object literal vs. switch statement lookup performance

Benchmark created by Geoff Little on April 20, 2018

Setup

var keys = ['1', '2', '3', '4', '5', '6', '7'];
  
  var objectLiteral = {
    '1': true,
    '2': true,
    '3': true,
    '4': true,
    '5': true,
    '6': true,
    '7': true,
  };
  
  function objectLiteralLookup(key, value) {
    if (typeof value === 'object') {
      return value;
    }
    return objectLiteral[key] ? value : undefined;
  };
  
  function switchStatementLookup(key, value) {
    if (typeof value === 'object') {
      return value;
    }
    switch (key) {
      case '1':
      case '2':
      case '3':
      case '4':
      case '5':
      case '6':
      case '7':
        return value;
      default:
        return undefined;
    }
  };
  
  function arrayLookup(key, value) {
    if (typeof value === 'object') {
      return value;
    }
    return keys.includes(key) ? value : undefined;
  };
  
  
  var input = {
    '1': 'a',
    '2': 'a',
    '3': 'a',
    '4': 'a',
    '5': 'a',
    '6': 'a',
    '7': 'a',
    '8': 'a',
    '9': 'a',
  };

Test runner

JSON.stringify(input, objectLiteralLookup)

JSON.stringify(input, switchStatementLookup)

JSON.stringify(input, arrayLookup)

Revisions

You can edit these tests or add more tests to this page by appending /edit to the URL.

• Revision 1: published by Geoff Little on April 20, 2018