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RESULTS-v21_7_3.md

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Adding property

name ops/sec samples
Directly in the object 101,201,863 50609978
Using dot notation 70,660,815 35334950
Using define property (writable) 4,206,612 2103308
Using define property initialized (writable) 5,963,283 2981843
Using define property (getter) 2,245,392 1122727
Environment
  • Machine: linux x64 | 4 vCPUs | 7.6GB Mem
  • Run: Tue Oct 29 2024 16:44:44 GMT+0000 (Coordinated Universal Time)
  • Node: v21.7.3

Array.append (number)

type amount time elapsed
array.push 10 0.004ms
new Array(length) 10 0.002ms
array.push 100 0.02ms
new Array(length) 100 0.013ms
array.push 1,000 0.028ms
new Array(length) 1,000 0.014ms
array.push 10,000 0.249ms
new Array(length) 10,000 0.142ms
array.push 1,000,000 24.293ms
new Array(length) 1,000,000 14.371ms
array.push 100,000,000 1,760.975ms
new Array(length) 100,000,000 4,468.255ms

Array.append (string)

type amount time elapsed
array.push 10 0.004ms
new Array(length) 10 0.003ms
array.push 100 0.015ms
new Array(length) 100 0.012ms
array.push 1,000 0.039ms
new Array(length) 1,000 0.02ms
array.push 10,000 0.323ms
new Array(length) 10,000 0.219ms
array.push 1,000,000 19.999ms
new Array(length) 1,000,000 7.432ms
array.push 100,000,000 1,938.284ms
new Array(length) 100,000,000 4,447.11ms

Array Creation

name ops/sec samples
new Array 264 133
Array.from 23 12
Environment
  • Machine: linux x64 | 4 vCPUs | 7.6GB Mem
  • Run: Tue Oct 29 2024 16:58:46 GMT+0000 (Coordinated Universal Time)
  • Node: v21.7.3

Blob

name ops/sec samples
new Blob (128) 4,635 2318
new Blob (1024) 607 304
text (128) 4,895 2448
text (1024) 614 308
arrayBuffer (128) 4,877 2442
arrayBuffer (1024) 620 312
slice (0, 64) 161,535 80927
slice (0, 512) 31,776 15889
Environment
  • Machine: linux x64 | 4 vCPUs | 7.6GB Mem
  • Run: Tue Oct 29 2024 17:04:40 GMT+0000 (Coordinated Universal Time)
  • Node: v21.7.3

Comparison using instanceof

name ops/sec samples
[True conditional] Using instanceof only 426,866 213467
[True conditional] Using constructor name 351,140 175571
[True conditional] Check if property is valid then instanceof 343,706 172190
[False conditional] Using instanceof only 93,583,673 46791846
[False conditional] Using constructor name 95,525,588 47766146
[False conditional] Check if property is valid then instanceof 95,824,032 47921762
Environment
  • Machine: linux x64 | 4 vCPUs | 7.6GB Mem
  • Run: Tue Oct 29 2024 17:10:46 GMT+0000 (Coordinated Universal Time)
  • Node: v21.7.3

Crypto Verify

name ops/sec samples
crypto.createVerify('RSA-SHA256') 6,795 3398
crypto.verify('RSA-SHA256') 6,891 3447
Environment
  • Machine: linux x64 | 4 vCPUs | 7.6GB Mem
  • Run: Tue Oct 29 2024 17:16:18 GMT+0000 (Coordinated Universal Time)
  • Node: v21.7.3

Date toISOString

name ops/sec samples
new Date().toISOString() 1,510,585 755302
fromUnixToISOString(new Date()) 2,097,247 1048784
Environment
  • Machine: linux x64 | 4 vCPUs | 7.6GB Mem
  • Run: Tue Oct 29 2024 17:21:55 GMT+0000 (Coordinated Universal Time)
  • Node: v21.7.3

Date format MM/DD/YYYY

name ops/sec samples
Intl.DateTimeFormat().format(Date.now()) 19,059 9530
Intl.DateTimeFormat().format(new Date()) 18,949 9475
Intl.DateTimeFormat(undefined, twoDigitsLocaleOptions).format(Date.now()) 19,109 9555
Intl.DateTimeFormat(undefined, twoDigitsLocaleOptions).format(new Date()) 18,572 9314
Reusing Intl.DateTimeFormat() 393,558 205605
Date.toLocaleDateString() 718,524 359427
Date.toLocaleDateString(undefined, twoDigitsLocaleOptions) 23,424 11713
Environment
  • Machine: linux x64 | 4 vCPUs | 7.6GB Mem
  • Run: Tue Oct 29 2024 17:28:26 GMT+0000 (Coordinated Universal Time)
  • Node: v21.7.3

Date String coersion

name ops/sec samples
Using String() 911,226 455614
Using brackets {} 910,457 455233
Using '' + 1,090,541 545271
Using date.toString() 1,165,321 582970
Environment
  • Machine: linux x64 | 4 vCPUs | 7.6GB Mem
  • Run: Tue Oct 29 2024 17:33:47 GMT+0000 (Coordinated Universal Time)
  • Node: v21.7.3

Deleting properties

name ops/sec samples
Using delete property 3,946,863 1973434
Using delete property (proto: null) 16,215,056 8124300
Using delete property (cached proto: null) 3,873,358 1936681
Using undefined assignment 77,742,529 39235537
Using undefined assignment (proto: null) 18,277,869 9140756
Using undefined property (cached proto: null) 78,314,465 39163054
Environment
  • Machine: linux x64 | 4 vCPUs | 7.6GB Mem
  • Run: Tue Oct 29 2024 17:39:37 GMT+0000 (Coordinated Universal Time)
  • Node: v21.7.3

Node.js Error

name ops/sec samples
Error 392,217 196140
NodeError 331,055 165528
NodeError Range 326,164 163091
Environment
  • Machine: linux x64 | 4 vCPUs | 7.6GB Mem
  • Run: Tue Oct 29 2024 17:45:01 GMT+0000 (Coordinated Universal Time)
  • Node: v21.7.3

Function return

name ops/sec samples
Function returning null 1,953,803 977016
Function returning explicitly undefined 1,844,722 922483
Function returning implicitly undefined 1,927,092 964112
Function returning string 1,888,703 944352
Function returning integer 1,954,012 977102
Function returning float 1,944,657 972567
Function returning functions 1,869,613 934807
Function returning arrow functions 1,919,298 959650
Function returning empty object 1,855,366 927685
Function returning empty array 1,941,881 970941
Environment
  • Machine: linux x64 | 4 vCPUs | 7.6GB Mem
  • Run: Tue Oct 29 2024 17:50:43 GMT+0000 (Coordinated Universal Time)
  • Node: v21.7.3

Array.includes vs raw comparison

name ops/sec samples
using Array.includes 89,798,914 44900677
using Array.includes (first item) 79,858,458 39929236
Using raw comparison 94,669,378 47335183
Using raw comparison (first item) 92,835,632 46417821
Environment
  • Machine: linux x64 | 4 vCPUs | 7.6GB Mem
  • Run: Tue Oct 29 2024 17:57:19 GMT+0000 (Coordinated Universal Time)
  • Node: v21.7.3

Object.keys vs Object.getOwnPropertyNames comparison

name ops/sec samples
Using Object.keys() 52,284,779 26142458
Using Object.getOwnPropertyNames() 42,781,095 21390549
Environment
  • Machine: linux x64 | 4 vCPUs | 7.6GB Mem
  • Run: Tue Oct 29 2024 18:02:17 GMT+0000 (Coordinated Universal Time)
  • Node: v21.7.3

Get the last item of an Array

name ops/sec samples
Length = 100 - Array.at 135,595,432 67800103
Length = 10_000 - Array.at 95,556,900 47778483
Length = 1_000_000 - Array.at 96,835,809 48423677
Length = 100 - Array[length - 1] 94,659,272 47334478
Length = 10_000 - Array[length - 1] 97,264,221 48791441
Length = 1_000_000 - Array[length - 1] 96,898,484 48456396
Environment
  • Machine: linux x64 | 4 vCPUs | 7.6GB Mem
  • Run: Tue Oct 29 2024 18:07:39 GMT+0000 (Coordinated Universal Time)
  • Node: v21.7.3

Math.floor vs ~

name ops/sec samples
Math.floor (small) 129,517,485 64758769
~ (small) 89,417,247 44708628
Math.floor (long) 88,125,691 44062850
~ (long) 90,874,320 45437164
Environment
  • Machine: linux x64 | 4 vCPUs | 7.6GB Mem
  • Run: Tue Oct 29 2024 18:13:44 GMT+0000 (Coordinated Universal Time)
  • Node: v21.7.3

Object Creation

name ops/sec samples
Object.create(null) 45,921,144 22960573
Object.create({}) 2,057,137 1042896
Cached Empty.prototype 115,699,846 57850337
Empty.prototype 2,204,891 1102470
Empty class 1,377,975 688995
Environment
  • Machine: linux x64 | 4 vCPUs | 7.6GB Mem
  • Run: Tue Oct 29 2024 18:19:17 GMT+0000 (Coordinated Universal Time)
  • Node: v21.7.3

Optional Chain (?) vs && operator

name ops/sec samples
Using optional chain (obj.field?.field2) (Valid) 144,790,472 72395257
Using optional chain (obj.field?.field2) (undefined) 98,635,833 49351409
Using and operator (obj.field && obj.field.field2) (Valid) 102,522,932 51262001
Using and operator (obj.field && obj.field.field2) (undefined) 101,554,652 51219617
Environment
  • Machine: linux x64 | 4 vCPUs | 7.6GB Mem
  • Run: Tue Oct 29 2024 18:25:07 GMT+0000 (Coordinated Universal Time)
  • Node: v21.7.3

Parsing Integer

name ops/sec samples
Using parseInt(x, 10) - small number (2 len) 141,987,453 71020690
Using parseInt(x, 10) - big number (10 len) 102,335,399 51167811
Using + - small number (2 len) 101,350,815 50815311
Using + - big number (10 len) 101,833,022 50916512
Environment
  • Machine: linux x64 | 4 vCPUs | 7.6GB Mem
  • Run: Tue Oct 29 2024 18:30:31 GMT+0000 (Coordinated Universal Time)
  • Node: v21.7.3

Possible undefined Function

name ops/sec samples
Using if to check function existence 1,037,863 521543
Using ? operator to avoid rejection 1,177,121 588585
Environment
  • Machine: linux x64 | 4 vCPUs | 7.6GB Mem
  • Run: Tue Oct 29 2024 18:36:18 GMT+0000 (Coordinated Universal Time)
  • Node: v21.7.3

Private Property

name ops/sec samples
Raw usage private field 136,647,711 68364745
Raw usage underscore usage 95,030,765 47515950
Manipulating private properties using # 95,581,216 49018486
Manipulating private properties using underscore(_) 96,857,458 48428736
Manipulating private properties using Symbol 99,057,946 49536653
Manipulating private properties using PrivateSymbol 34,268,963 17134876
Environment
  • Machine: linux x64 | 4 vCPUs | 7.6GB Mem
  • Run: Tue Oct 29 2024 18:42:38 GMT+0000 (Coordinated Universal Time)
  • Node: v21.7.3

Property access after shape transition

name ops/sec samples
Adding property after object creation - small object 7,605,274 3802844
Adding property in the object creation - small object 7,352,817 3676816
Adding property after the function creation - small class 237,578 119201
Adding property in the function creation - small class 250,902 126024
Adding property after the class creation - small class 242,140 121072
Adding property in the class creation - small class 241,428 121382
Environment
  • Machine: linux x64 | 4 vCPUs | 7.6GB Mem
  • Run: Tue Oct 29 2024 18:47:57 GMT+0000 (Coordinated Universal Time)
  • Node: v21.7.3

Property Getter Access

name ops/sec samples
Getter (class) 138,793,632 69397766
Getter 50,204,090 25150313
Method 99,207,808 49618166
DefineProperty (getter) 97,187,230 48593617
DefineProperty (getter & enumerable=false) 48,228,113 24150754
DefineProperty (getter & configurable=false) 95,758,104 47879060
DefineProperty (getter & enumerable=false & configurable=false) 51,165,081 25582552
DefineProperty (writable) 97,656,848 48830966
DefineProperty (writable & enumerable=false) 97,624,563 48817541
DefineProperty (writable & enumerable=false & configurable=false) 97,850,971 48927524
DefineProperties (getter) 51,520,069 25760048
DefineProperties (getter & enumerable=false) 51,149,559 25576158
DefineProperties (getter & enumerable=false & configurable=false) 50,563,156 25281736
Environment
  • Machine: linux x64 | 4 vCPUs | 7.6GB Mem
  • Run: Tue Oct 29 2024 18:54:02 GMT+0000 (Coordinated Universal Time)
  • Node: v21.7.3

Property Setter Access

name ops/sec samples
Setter (class) 142,313,880 71156982
Setter 11,325,090 5662550
Method 93,340,326 46684329
DefineProperty (setter) 99,974,733 49987448
DefineProperty (setter & enumerable=false) 11,696,351 5851173
DefineProperty (setter & configurable=false) 11,509,578 5754793
DefineProperty (setter & enumerable=false & configurable=false) 11,711,929 5855967
DefineProperty (writable) 98,981,158 49495219
DefineProperty (writable & enumerable=false) 99,368,868 49700904
DefineProperty (writable & enumerable=false & configurable=false) 99,417,864 49714778
DefineProperties (setter) 96,410,659 48210427
DefineProperties (setter & enumerable=false) 11,352,534 5676278
DefineProperties (setter & enumerable=false & configurable=false) 11,416,136 5708128
Environment
  • Machine: linux x64 | 4 vCPUs | 7.6GB Mem
  • Run: Tue Oct 29 2024 19:01:11 GMT+0000 (Coordinated Universal Time)
  • Node: v21.7.3

replace vs replaceAll comparison

name ops/sec samples
Using replace(//g) 3,403,134 1701568
Using replaceAll() 3,114,553 1557873
Using replaceAll(//g) 3,168,608 1584305
Environment
  • Machine: linux x64 | 4 vCPUs | 7.6GB Mem
  • Run: Tue Oct 29 2024 19:06:47 GMT+0000 (Coordinated Universal Time)
  • Node: v21.7.3

Shallow Copy

name ops/sec samples
{ ...object } 24,714,609 12357630
{ ...object, proto: null } 2,566,008 1283005
{ ...object, newProp: true } 21,237,459 10619982
structuredClone 294,611 147321
JSON.parse + JSON.stringify 273,863 136932
loop + object.keys starting with {} 1,584,145 792258
loop + object.keys starting with { proto: null } 842,892 421447
loop + object.keys starting with { randomProp: true } 649,831 324933
object.keys + reduce(FN, {}) 1,653,605 826948
object.keys + reduce(FN, { proto: null }) 870,600 435364
object.keys + reduce(FN, { newProp: true }) 665,892 332989
Environment
  • Machine: linux x64 | 4 vCPUs | 7.6GB Mem
  • Run: Tue Oct 29 2024 19:12:54 GMT+0000 (Coordinated Universal Time)
  • Node: v21.7.3

Sorting Map

name ops/sec samples
Sort using default 307,245 153654
Sort using first char 1,368,288 684892
Sort using localeCompare 1,279,376 639854
Environment
  • Machine: linux x64 | 4 vCPUs | 7.6GB Mem
  • Run: Tue Oct 29 2024 19:19:31 GMT+0000 (Coordinated Universal Time)
  • Node: v21.7.3

Object.assign VS spread operator

name ops/sec samples
{...bigObject} - Total keys: 1000 1,870 938
{...smallObject} - Total keys: 2 59,146,405 29596653
Object.assign({}, bigObject, anotherBigObject) - Total keys: 1000 - creating new object 1,095 548
Object.assign(bigObject, anotherBigObject) - mutating bigObject 6,533 3267
{ ...bigObject, ...anotherBigObject } 1,167 584
Object.assign({}, smallObject, anotherSmallObject) - creating new object 12,678,430 6341033
Object.assign(smallObject, anotherSmallObject) - mutating smallObject 29,165,903 14583249
{ ...smallObject, ...anotherSmallObject } 20,792,578 10396306
Environment
  • Machine: linux x64 | 4 vCPUs | 7.6GB Mem
  • Run: Tue Oct 29 2024 19:25:07 GMT+0000 (Coordinated Universal Time)
  • Node: v21.7.3

Stream.Readable

name ops/sec samples
streams.Readable reading 1e3 * "some data" 2,167 1100
streams.web.Readable reading 1e3 * "some data" 1,811 906
Environment
  • Machine: linux x64 | 4 vCPUs | 7.6GB Mem
  • Run: Tue Oct 29 2024 19:30:49 GMT+0000 (Coordinated Universal Time)
  • Node: v21.7.3

Stream.Writable

name ops/sec samples
streams.Writable writing 1e3 * "some data" 6,528 3265
streams.web.WritableStream writing 1e3 * "some data" 1,841 932
Environment
  • Machine: linux x64 | 4 vCPUs | 7.6GB Mem
  • Run: Tue Oct 29 2024 19:36:29 GMT+0000 (Coordinated Universal Time)
  • Node: v21.7.3

String concat

name ops/sec samples
Using + sign 136,701,211 68350609
Using backtick (`) 98,384,466 49232334
Using array.join 10,366,621 5183312
Environment
  • Machine: linux x64 | 4 vCPUs | 7.6GB Mem
  • Run: Tue Oct 29 2024 19:42:11 GMT+0000 (Coordinated Universal Time)
  • Node: v21.7.3

endsWith comparison

name ops/sec samples
(short string) (true) String#endsWith 111,693,599 56088955
(short string) (true) String#slice and strict comparison 59,265,544 29637282
(long string) (true) String#endsWith 62,732,661 31366352
(long string) (true) String#slice and strict comparison 53,692,569 26846294
(short string) (false) String#endsWith 96,674,201 48351590
(short string) (false) String#slice and strict comparison 59,439,353 29719678
(long string) (false) String#endsWith 89,338,837 44673021
(long string) (false) String#slice and strict comparison 53,599,009 26799550
Environment
  • Machine: linux x64 | 4 vCPUs | 7.6GB Mem
  • Run: Tue Oct 29 2024 19:48:05 GMT+0000 (Coordinated Universal Time)
  • Node: v21.7.3

String searching

name ops/sec samples
Using includes 134,737,796 67368915
Using indexof 15,736,670 7868337
Using RegExp.test 13,326,873 6663492
Using RegExp.text with cached regex pattern 14,237,984 7119037
Using new RegExp.test 4,592,313 2296158
Using new RegExp.test with cached regex pattern 5,194,839 2597628
Environment
  • Machine: linux x64 | 4 vCPUs | 7.6GB Mem
  • Run: Tue Oct 29 2024 19:54:12 GMT+0000 (Coordinated Universal Time)
  • Node: v21.7.3

startsWith comparison

name ops/sec samples
(short string) (true) String#startsWith 106,238,828 53181782
(short string) (true) String#slice and strict comparison 59,554,357 29785901
(long string) (true) String#startsWith 64,145,400 32073264
(long string) (true) String#slice and strict comparison 53,724,477 26887018
(short string) (false) String#startsWith 99,102,557 49552007
(short string) (false) String#slice and strict comparison 59,809,998 29905149
(long string) (false) String#startsWith 82,695,957 41352782
(long string) (false) String#slice and strict comparison 53,790,207 26895110
Environment
  • Machine: linux x64 | 4 vCPUs | 7.6GB Mem
  • Run: Tue Oct 29 2024 19:59:57 GMT+0000 (Coordinated Universal Time)
  • Node: v21.7.3

Super vs This

name ops/sec samples
Using super 121,250,684 60625897
Using this 90,374,201 45187267
Environment
  • Machine: linux x64 | 4 vCPUs | 7.6GB Mem
  • Run: Tue Oct 29 2024 20:09:30 GMT+0000 (Coordinated Universal Time)
  • Node: v21.7.3

Getting unix time

name ops/sec samples
new Date().getTime() 11,672,894 5836835
Date.now() 19,354,623 9677314
Environment
  • Machine: linux x64 | 4 vCPUs | 7.6GB Mem
  • Run: Tue Oct 29 2024 20:15:21 GMT+0000 (Coordinated Universal Time)
  • Node: v21.7.3