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RESULTS-v21_0_0.md

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Adding property

name ops/sec samples
Directly in the object 16,474,928 8237465
Using dot notation 16,519,020 8259511
Using define property (writable) 3,345,397 1672699
Using define property initialized (writable) 4,290,219 2145110
Using define property (getter) 2,080,425 1040213
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Mon May 13 2024 18:29:48 GMT+0000 (Coordinated Universal Time)

Array.append (number)

type amount time elapsed
array.push 10 0.019ms
new Array(length) 10 0.002ms
array.push 100 0.099ms
new Array(length) 100 0.012ms
array.push 1,000 0.039ms
new Array(length) 1,000 0.017ms
array.push 10,000 0.298ms
new Array(length) 10,000 0.168ms
array.push 1,000,000 26.143ms
new Array(length) 1,000,000 17.862ms
array.push 100,000,000 1,954.795ms
new Array(length) 100,000,000 4,322.033ms

Array.append (string)

type amount time elapsed
array.push 10 0.007ms
new Array(length) 10 0.003ms
array.push 100 0.017ms
new Array(length) 100 0.011ms
array.push 1,000 0.04ms
new Array(length) 1,000 0.021ms
array.push 10,000 0.306ms
new Array(length) 10,000 0.203ms
array.push 1,000,000 19.796ms
new Array(length) 1,000,000 7.576ms
array.push 100,000,000 2,116.504ms
new Array(length) 100,000,000 4,911.252ms

Array Creation

name ops/sec samples
new Array 230 116
Array.from 23 12
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Mon May 13 2024 18:51:56 GMT+0000 (Coordinated Universal Time)

Comparison using instanceof

name ops/sec samples
[True conditional] Using instanceof only 315,821 157911
[True conditional] Using constructor name 322,054 161028
[True conditional] Check if property is valid then instanceof 325,660 162831
[False conditional] Using instanceof only 16,429,710 8214856
[False conditional] Using constructor name 16,563,222 8281612
[False conditional] Check if property is valid then instanceof 16,524,490 8262246
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Mon May 13 2024 15:49:09 GMT+0000 (Coordinated Universal Time)

Crypto Verify

name ops/sec samples
crypto.createVerify('RSA-SHA256') 6,629 3315
crypto.verify('RSA-SHA256') 6,831 3416
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Mon May 13 2024 15:54:44 GMT+0000 (Coordinated Universal Time)

Date String coersion

name ops/sec samples
Using String() 1,016,084 508043
Using brackets {} 1,052,606 526304
Using '' + 1,052,764 526383
Using date.toString() 1,173,488 586745
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Mon May 13 2024 16:10:10 GMT+0000 (Coordinated Universal Time)

Deleting properties

name ops/sec samples
Using delete property 3,283,967 1641984
Using delete property (proto: null) 9,050,929 4525465
Using delete property (cached proto: null) 3,269,238 1634620
Using undefined assignment 16,554,281 8277141
Using undefined assignment (proto: null) 9,450,096 4725049
Using undefined property (cached proto: null) 16,548,120 8274061
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Thu May 09 2024 21:22:38 GMT+0000 (Coordinated Universal Time)

Node.js Error

name ops/sec samples
Error 306,392 153197
NodeError 304,201 152101
NodeError Range 310,812 155407
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Thu May 09 2024 21:28:55 GMT+0000 (Coordinated Universal Time)

Function return

name ops/sec samples
Function returning null 1,611,843 805922
Function returning explicitly undefined 1,599,497 799749
Function returning implicitly undefined 1,633,553 816777
Function returning string 1,575,682 787842
Function returning integer 1,643,710 821856
Function returning float 1,623,868 811935
Function returning functions 1,573,396 786699
Function returning arrow functions 1,603,141 801571
Function returning empty object 1,618,937 809469
Function returning empty array 1,590,523 795262
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Thu May 09 2024 21:34:59 GMT+0000 (Coordinated Universal Time)

Array.includes vs raw comparison

name ops/sec samples
using Array.includes 16,464,949 8232475
using Array.includes (first item) 16,516,749 8258375
Using raw comparison 16,499,465 8249733
Using raw comparison (first item) 16,525,302 8262652
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Thu May 09 2024 21:42:47 GMT+0000 (Coordinated Universal Time)

Object.keys vs Object.getOwnPropertyNames comparison

name ops/sec samples
Using Object.keys() 13,712,878 6856440
Using Object.getOwnPropertyNames() 14,541,635 7270818
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Thu May 09 2024 21:49:41 GMT+0000 (Coordinated Universal Time)

Get the last item of an Array

name ops/sec samples
Length = 100 - Array.at 16,226,035 8113018
Length = 10_000 - Array.at 16,288,002 8144002
Length = 1_000_000 - Array.at 16,352,996 8176499
Length = 100 - Array[length - 1] 16,284,992 8142497
Length = 10_000 - Array[length - 1] 16,259,356 8129679
Length = 1_000_000 - Array[length - 1] 16,286,055 8143028
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Thu May 09 2024 21:57:39 GMT+0000 (Coordinated Universal Time)

Object Creation

name ops/sec samples
Object.create(null) 12,919,273 6459637
Object.create({}) 1,855,643 927822
Cached Empty.prototype 16,352,228 8176115
Empty.prototype 1,865,039 932520
Empty class 1,252,707 626354
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Thu May 09 2024 22:06:33 GMT+0000 (Coordinated Universal Time)

Optional Chain (?) vs && operator

name ops/sec samples
Using optional chain (obj.field?.field2) (Valid) 16,502,256 8251129
Using optional chain (obj.field?.field2) (undefined) 16,571,001 8285501
Using and operator (obj.field && obj.field.field2) (Valid) 16,565,117 8282559
Using and operator (obj.field && obj.field.field2) (undefined) 16,619,824 8309913
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Thu May 09 2024 22:14:26 GMT+0000 (Coordinated Universal Time)

Parsing Integer

name ops/sec samples
Using parseInt(x, 10) - small number (2 len) 16,531,374 8265688
Using parseInt(x, 10) - big number (10 len) 16,530,874 8265438
Using + - small number (2 len) 16,546,447 8273224
Using + - big number (10 len) 16,577,468 8288735
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Thu May 09 2024 22:22:23 GMT+0000 (Coordinated Universal Time)

Possible undefined Function

name ops/sec samples
Using if to check function existence 1,097,886 548944
Using ? operator to avoid rejection 1,100,652 550327
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Thu May 09 2024 22:27:56 GMT+0000 (Coordinated Universal Time)

Private Property

name ops/sec samples
Raw usage private field 16,466,371 8233186
Raw usage underscore usage 16,433,279 8216640
Manipulating private properties using # 16,483,245 8241623
Manipulating private properties using underscore(_) 16,512,292 8256147
Manipulating private properties using Symbol 16,463,103 8231552
Manipulating private properties using PrivateSymbol 11,957,641 5978821
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Thu May 09 2024 22:35:34 GMT+0000 (Coordinated Universal Time)

Property access after shape transition

name ops/sec samples
Adding property after object creation - small object 3,932,181 1966091
Adding property in the object creation - small object 3,944,214 1972108
Adding property after the function creation - small class 270,005 135003
Adding property in the function creation - small class 258,766 129384
Adding property after the class creation - small class 273,437 136719
Adding property in the class creation - small class 261,847 130924
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Thu May 09 2024 22:42:57 GMT+0000 (Coordinated Universal Time)

Property Getter Access

name ops/sec samples
Getter (class) 16,490,182 8245092
Getter 13,860,676 6930339
Method 16,392,167 8196084
DefineProperty (getter) 16,324,605 8162303
DefineProperty (getter & enumerable=false) 13,855,641 6927821
DefineProperty (getter & configurable=false) 16,516,760 8258381
DefineProperty (getter & enumerable=false & configurable=false) 13,739,464 6869733
DefineProperty (writable) 16,313,963 8156982
DefineProperty (writable & enumerable=false) 16,338,304 8169153
DefineProperty (writable & enumerable=false & configurable=false) 16,442,000 8221001
DefineProperties (getter) 12,776,139 6388070
DefineProperties (getter & enumerable=false) 13,802,180 6901091
DefineProperties (getter & enumerable=false & configurable=false) 13,749,801 6874901
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Thu May 09 2024 22:55:07 GMT+0000 (Coordinated Universal Time)

Property Setter Access

name ops/sec samples
Setter (class) 16,386,771 8193386
Setter 6,741,587 3370794
Method 16,296,630 8148316
DefineProperty (setter) 16,303,921 8151961
DefineProperty (setter & enumerable=false) 6,708,281 3354141
DefineProperty (setter & configurable=false) 6,776,614 3388308
DefineProperty (setter & enumerable=false & configurable=false) 6,834,043 3417022
DefineProperty (writable) 16,353,826 8176914
DefineProperty (writable & enumerable=false) 16,314,836 8157419
DefineProperty (writable & enumerable=false & configurable=false) 16,093,179 8046590
DefineProperties (setter) 16,316,163 8158082
DefineProperties (setter & enumerable=false) 6,592,265 3296133
DefineProperties (setter & enumerable=false & configurable=false) 6,819,070 3409536
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Thu May 09 2024 23:12:13 GMT+0000 (Coordinated Universal Time)

Shallow Copy

name ops/sec samples
{ ...object } 9,954,997 4977499
{ ...object, proto: null } 2,226,060 1113031
{ ...object, newProp: true } 10,011,808 5005905
structuredClone 277,320 138661
JSON.parse + JSON.stringify 249,426 124714
loop + object.keys starting with {} 1,413,122 706562
loop + object.keys starting with { proto: null } 812,495 406248
loop + object.keys starting with { randomProp: true } 653,118 326560
object.keys + reduce(FN, {}) 1,469,486 734744
object.keys + reduce(FN, { proto: null }) 827,922 413962
object.keys + reduce(FN, { newProp: true }) 671,880 335941
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Thu May 09 2024 23:26:56 GMT+0000 (Coordinated Universal Time)

Sorting Map

name ops/sec samples
Sort using default 339,627 169814
Sort using first char 1,314,199 657100
Sort using localeCompare 1,235,449 617725
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Thu May 09 2024 23:33:42 GMT+0000 (Coordinated Universal Time)

Object.assign VS spread operator

name ops/sec samples
{...bigObject} - Total keys: 1000 2,236 1119
{...smallObject} - Total keys: 2 13,137,182 6568592
Object.assign({}, bigObject, anotherBigObject) - Total keys: 1000 - creating new object 2,362 1182
Object.assign(bigObject, anotherBigObject) - mutating bigObject 6,645 3323
{ ...bigObject, ...anotherBigObject } 1,363 682
Object.assign({}, smallObject, anotherSmallObject) - creating new object 6,789,657 3394829
Object.assign(smallObject, anotherSmallObject) - mutating smallObject 10,797,458 5398730
{ ...smallObject, ...anotherSmallObject } 9,030,279 4515140
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Thu May 09 2024 23:42:05 GMT+0000 (Coordinated Universal Time)

String concat

name ops/sec samples
Using + sign 16,239,840 8119921
Using backtick (`) 16,400,717 8200359
Using array.join 6,510,987 3255494
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Thu May 09 2024 23:59:34 GMT+0000 (Coordinated Universal Time)

endsWith comparison

name ops/sec samples
(short string) (true) String#endsWith 15,422,273 7711137
(short string) (true) String#slice and strict comparison 16,259,078 8129540
(long string) (true) String#endsWith 13,827,360 6913681
(long string) (true) String#slice and strict comparison 16,125,829 8062915
(short string) (false) String#endsWith 15,752,731 7876366
(short string) (false) String#slice and strict comparison 16,250,547 8125274
(long string) (false) String#endsWith 15,799,782 7899892
(long string) (false) String#slice and strict comparison 16,297,757 8148879
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Fri May 10 2024 00:12:13 GMT+0000 (Coordinated Universal Time)

String searching

name ops/sec samples
Using includes 16,276,166 8138084
Using indexof 16,271,955 8135978
Using RegExp.test 7,498,718 3749360
Using RegExp.text with cached regex pattern 8,568,436 4284219
Using new RegExp.test 3,558,142 1779072
Using new RegExp.test with cached regex pattern 3,830,290 1915146
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Fri May 10 2024 00:21:34 GMT+0000 (Coordinated Universal Time)

startsWith comparison

name ops/sec samples
(short string) (true) String#startsWith 15,714,467 7857234
(short string) (true) String#slice and strict comparison 16,572,255 8286128
(long string) (true) String#startsWith 14,270,536 7135269
(long string) (true) String#slice and strict comparison 16,259,171 8129586
(short string) (false) String#startsWith 15,856,209 7928106
(short string) (false) String#slice and strict comparison 16,448,212 8224107
(long string) (false) String#startsWith 16,009,724 8004863
(long string) (false) String#slice and strict comparison 16,517,752 8258877
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Fri May 10 2024 00:31:29 GMT+0000 (Coordinated Universal Time)

Super vs This

name ops/sec samples
Using super 16,006,487 8003244
Using this 16,433,671 8216836
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Fri May 10 2024 00:40:19 GMT+0000 (Coordinated Universal Time)

Getting unix time

name ops/sec samples
new Date().getTime() 6,632,200 3316101
Date.now() 9,303,032 4651517
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Fri May 10 2024 00:45:40 GMT+0000 (Coordinated Universal Time)