Benchmark: Map vs Object with random keys

Map vs Object with random keys (version: 0)

Insert/delete of map vs object

Comparing performance of: Map insert vs Obj insert vs Map delete vs Obj delete using delete vs Extra: Object delete assimiling undefined vs Map lookup vs Object lookup vs Map check vs Object check(key in) non-secure vs Object check using hasOwnProperty vs Object check using hasOwnProperty secure implementation

Created: 4 years ago by: Guest

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Script Preparation code:

var insertMap = new Map();
var insertObj = {};

var ID = function () {
  return '_' + Math.random().toString(36).substr(2, 9);
};

var toLookupMap = new Map();
var toLookupObj = {};
var toLookupKeys = [];
var toDeleteMap = new Map();
var toDeleteObj = {};
var toDeleteKeys = [];

var i = 0, count = 1000;

for (i = 0; i < count; i++) {
  var key = ID();
  toDeleteMap.set(key, 0);
  toDeleteObj[key] = 0;
  toDeleteKeys.push(key);

  var key2 = ID();
  toLookupMap.set(key2, 0);
  toLookupObj[key2] = 0;
  toLookupKeys.push(key2);
}

Tests:

Map insert
for (i = 0; i < count; i++) { insertMap.set(ID(), 0); }
Obj insert
for (i = 0; i < count; i++) { insertObj[ID()] = 0; }
Map delete
toDeleteKeys.forEach(function (key) { toDeleteMap.delete(key); });
Obj delete using delete
toDeleteKeys.forEach(function (key) { delete toDeleteObj[key]; });
Extra: Object delete assimiling undefined
toDeleteKeys.forEach(function (key) { toDeleteObj[key] = undefined; });
Map lookup
toLookupKeys.forEach(function (key) { toLookupMap.get(key); });
Object lookup
toLookupKeys.forEach(function (key) { toLookupObj[key]; });
Map check
toLookupKeys.forEach(function (key) { toLookupMap.has(key); });
Object check(key in) non-secure
toLookupKeys.forEach(function (key) { key in toLookupObj; });
Object check using hasOwnProperty
toLookupKeys.forEach(function (key) { toLookupObj.hasOwnProperty(key); });
Object check using hasOwnProperty secure implementation
toLookupKeys.forEach(function (key) { Object.prototype.hasOwnProperty.call(toLookupObj, key); });

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Map insert
Obj insert
Map delete
Obj delete using delete
Extra: Object delete assimiling undefined
Map lookup
Object lookup
Map check
Object check(key in) non-secure
Object check using hasOwnProperty
Object check using hasOwnProperty secure implementation

Fastest: N/A

Slowest: N/A

Latest run results:

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Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

LLMs can make mistakes. Check important info.

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