Benchmark: JS Lookup methods

Script Preparation code:

// Each method asks the question after data structures havebeen created
//  1. does Tom exist as a user in this data
//  2. What is the state Tom works from?

// Method 1 - Index of to get items from other array
//  1. exists = keyNames.indexOf('Tom') >= 0;
//  2. getState = keyStates[keyNames.indexOf('Tom')];

const keyNames =  ["Amanda", "Tom",  "Hope", "James", "Cindy", "Zack"];
const keyStates = ["Main",   "Utah", "Ohio", "Texas", "Idaho", "Iowa"];
const keyTitles = ["Sales",  "OPs",  "HR",   "AP",    "PO",    "SO"  ];

// Method 1B - Create Object lookup indexes
//   1. exists = nameIndex['Tom'];
//   2. getState = keyStates[nameIndex['Tom']];
const nameIndex  = keyNames.reducde((i,v,s)=> return s[v]=i;, {});
const stateIndex = keyStates.reducde((i,v,s)=> return s[v]=i;, {});
const titleIndex = keyTitles.reducde((i,v,s)=> return s[v]=i;, {});


// Method 2 - Array of objects, using .filter
//   1. exists = arrObjects.filter(o=>0.name==='Tom').length > 0;
//   2. getState = arrObjects.filter(o=>o.name==='Tom')[0].state;
//
const arrObjects =[ {name: "Amanda, State: "Main",  title: "Sales" }, 
					{name: "Tom",   State: "Utah",  title: "Ops"   },
		            {name: "Hope",  state: "Ohio",  title: "HR"    },
				    {name: "James", state: "Texax", title: "AP"    },
                    {name: "Cindy", state: "Idaho", title: "PO"    },
				    {name: "Zack",  state: "Iowa",  title: "SO"    } ];


const object = {Amanda:"Main", Tom:"Utah", Hope:"Ohio", James:"Texas", Cind:"Idaho", Zack:"Iowa"};

Tests:

Method 1A - Does tom Exist using indexOf
var i = userNames.indexOf('Tom');
Method 1B - Get State using indexOf
var state = userStates[userNames.indexOf('Tom')];
Method 2 - Filter Object
var i = arrObjects.filter(o=>o).length === 1
Method 2B - Filter Object for State
var state = arrObjects

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Method 1A - Does tom Exist using indexOf
Method 1B - Get State using indexOf
Method 2 - Filter Object
Method 2B - Filter Object for State

Fastest: N/A

Slowest: N/A

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JS Lookup methods (version: 0)

Which is the faster and lower memmory way to use named keys in JS

Comparing performance of: Method 1A - Does tom Exist using indexOf vs Method 1B - Get State using indexOf vs Method 2 - Filter Object vs Method 2B - Filter Object for State

Created: 2 years ago by: Guest

Jump to the latest result

Method 1A - Does tom Exist using indexOf

Method 1B - Get State using indexOf

Method 2 - Filter Object

Method 2B - Filter Object for State

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

No previous run results