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RESULTS-v18.md

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Adding property

name ops/sec samples
Directly in the object 16,939,761 8469881
Using dot notation 16,991,364 8495683
Using define property (writable) 3,294,047 1647024
Using define property initialized (writable) 4,085,194 2042598
Using define property (getter) 2,052,606 1026304
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Mon May 13 2024 18:25:41 GMT+0000 (Coordinated Universal Time)

Array.append (number)

type amount time elapsed
array.push 10 0.011ms
new Array(length) 10 0.002ms
array.push 100 0.024ms
new Array(length) 100 0.01ms
array.push 1,000 0.044ms
new Array(length) 1,000 0.022ms
array.push 10,000 0.379ms
new Array(length) 10,000 0.156ms
array.push 1,000,000 25.94ms
new Array(length) 1,000,000 15.262ms
array.push 100,000,000 2,199.461ms
new Array(length) 100,000,000 4,236.664ms

Array.append (string)

type amount time elapsed
array.push 10 0.006ms
new Array(length) 10 0.016ms
array.push 100 0.013ms
new Array(length) 100 0.009ms
array.push 1,000 0.043ms
new Array(length) 1,000 0.024ms
array.push 10,000 0.459ms
new Array(length) 10,000 3.08ms
array.push 1,000,000 253.067ms
new Array(length) 1,000,000 4.575ms
array.push 100,000,000 2,600.14ms
new Array(length) 100,000,000 4,630.325ms

Array Creation

name ops/sec samples
new Array 229 115
Array.from 22 12
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Mon May 13 2024 18:50:13 GMT+0000 (Coordinated Universal Time)

Comparison using instanceof

name ops/sec samples
[True conditional] Using instanceof only 308,926 154464
[True conditional] Using constructor name 303,606 151804
[True conditional] Check if property is valid then instanceof 308,166 154084
[False conditional] Using instanceof only 12,323,552 6161777
[False conditional] Using constructor name 16,171,625 8085813
[False conditional] Check if property is valid then instanceof 16,168,769 8084385
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Mon May 13 2024 15:46:18 GMT+0000 (Coordinated Universal Time)

Crypto Verify

name ops/sec samples
crypto.createVerify('RSA-SHA256') 6,812 3407
crypto.verify('RSA-SHA256') 6,751 3376
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Mon May 13 2024 15:54:04 GMT+0000 (Coordinated Universal Time)

Date String coersion

name ops/sec samples
Using String() 1,071,722 535862
Using brackets {} 1,086,656 543329
Using '' + 1,074,277 537139
Using date.toString() 1,171,643 585822
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Mon May 13 2024 16:08:17 GMT+0000 (Coordinated Universal Time)

Deleting properties

name ops/sec samples
Using delete property 2,873,402 1436702
Using delete property (proto: null) 8,286,215 4143108
Using delete property (cached proto: null) 2,904,058 1452030
Using undefined assignment 15,246,729 7623365
Using undefined assignment (proto: null) 9,032,064 4516033
Using undefined property (cached proto: null) 15,279,532 7639767
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Thu May 09 2024 21:19:16 GMT+0000 (Coordinated Universal Time)

Node.js Error

name ops/sec samples
Error 299,157 149579
NodeError 296,979 148490
NodeError Range 305,280 152641
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Thu May 09 2024 21:26:41 GMT+0000 (Coordinated Universal Time)

Function return

name ops/sec samples
Function returning null 1,532,370 766186
Function returning explicitly undefined 1,455,669 727835
Function returning implicitly undefined 1,481,147 740574
Function returning string 1,466,044 733023
Function returning integer 1,482,180 741091
Function returning float 1,453,744 726873
Function returning functions 1,420,435 710218
Function returning arrow functions 1,454,915 727458
Function returning empty object 1,445,977 722989
Function returning empty array 1,478,348 739175
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Thu May 09 2024 21:33:00 GMT+0000 (Coordinated Universal Time)

Array.includes vs raw comparison

name ops/sec samples
using Array.includes 17,167,493 8583747
using Array.includes (first item) 16,400,697 8200349
Using raw comparison 17,119,705 8559853
Using raw comparison (first item) 17,206,260 8603131
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Thu May 09 2024 21:38:37 GMT+0000 (Coordinated Universal Time)

Object.keys vs Object.getOwnPropertyNames comparison

name ops/sec samples
Using Object.keys() 13,922,457 6961229
Using Object.getOwnPropertyNames() 13,587,074 6793538
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Thu May 09 2024 21:46:59 GMT+0000 (Coordinated Universal Time)

Get the last item of an Array

name ops/sec samples
Length = 100 - Array.at 8,760,348 4380175
Length = 10_000 - Array.at 9,220,929 4610465
Length = 1_000_000 - Array.at 9,219,635 4609818
Length = 100 - Array[length - 1] 16,605,450 8302726
Length = 10_000 - Array[length - 1] 16,361,477 8180739
Length = 1_000_000 - Array[length - 1] 16,408,726 8204364
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Thu May 09 2024 21:53:01 GMT+0000 (Coordinated Universal Time)

Object Creation

name ops/sec samples
Object.create(null) 13,108,335 6554168
Object.create({}) 1,478,525 739265
Cached Empty.prototype 16,924,559 8462280
Empty.prototype 1,516,640 758321
Empty class 1,016,983 508492
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Thu May 09 2024 22:03:24 GMT+0000 (Coordinated Universal Time)

Optional Chain (?) vs && operator

name ops/sec samples
Using optional chain (obj.field?.field2) (Valid) 17,074,244 8537123
Using optional chain (obj.field?.field2) (undefined) 16,979,253 8489627
Using and operator (obj.field && obj.field.field2) (Valid) 17,014,893 8507447
Using and operator (obj.field && obj.field.field2) (undefined) 17,053,868 8526935
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Thu May 09 2024 22:11:25 GMT+0000 (Coordinated Universal Time)

Parsing Integer

name ops/sec samples
Using parseInt(x, 10) - small number (2 len) 16,773,711 8386856
Using parseInt(x, 10) - big number (10 len) 8,717,140 4358571
Using + - small number (2 len) 16,441,288 8220645
Using + - big number (10 len) 16,420,978 8210490
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Thu May 09 2024 22:18:48 GMT+0000 (Coordinated Universal Time)

Possible undefined Function

name ops/sec samples
Using if to check function existence 729,969 376748
Using ? operator to avoid rejection 797,149 398575
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Thu May 09 2024 22:26:55 GMT+0000 (Coordinated Universal Time)

Private Property

name ops/sec samples
Raw usage private field 16,203,906 8101954
Raw usage underscore usage 16,049,415 8024708
Manipulating private properties using # 14,479,194 7239734
Manipulating private properties using underscore(_) 14,034,063 7017032
Manipulating private properties using Symbol 14,836,033 7418017
Manipulating private properties using PrivateSymbol 10,613,013 5306507
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Thu May 09 2024 22:31:51 GMT+0000 (Coordinated Universal Time)

Property access after shape transition

name ops/sec samples
Adding property after object creation - small object 2,912,868 1456435
Adding property in the object creation - small object 2,906,996 1453499
Adding property after the function creation - small class 211,279 105640
Adding property in the function creation - small class 219,056 109530
Adding property after the class creation - small class 180,662 90332
Adding property in the class creation - small class 180,217 90109
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Thu May 09 2024 22:40:58 GMT+0000 (Coordinated Universal Time)

Property Getter Access

name ops/sec samples
Getter (class) 16,341,100 8170551
Getter 14,159,022 7079512
Method 16,569,268 8284635
DefineProperty (getter) 16,461,087 8230544
DefineProperty (getter & enumerable=false) 13,861,744 6930873
DefineProperty (getter & configurable=false) 16,690,327 8345164
DefineProperty (getter & enumerable=false & configurable=false) 14,012,608 7006305
DefineProperty (writable) 16,396,668 8198335
DefineProperty (writable & enumerable=false) 17,157,603 8578802
DefineProperty (writable & enumerable=false & configurable=false) 17,201,763 8600882
DefineProperties (getter) 13,763,595 6881798
DefineProperties (getter & enumerable=false) 13,766,879 6883440
DefineProperties (getter & enumerable=false & configurable=false) 14,051,472 7025737
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Thu May 09 2024 22:47:17 GMT+0000 (Coordinated Universal Time)

Property Setter Access

name ops/sec samples
Setter (class) 16,839,349 8419675
Setter 6,131,888 3065945
Method 16,209,950 8104976
DefineProperty (setter) 16,014,376 8007189
DefineProperty (setter & enumerable=false) 6,160,452 3080227
DefineProperty (setter & configurable=false) 6,245,057 3122530
DefineProperty (setter & enumerable=false & configurable=false) 5,896,263 2948132
DefineProperty (writable) 15,535,315 7767658
DefineProperty (writable & enumerable=false) 15,533,474 7766738
DefineProperty (writable & enumerable=false & configurable=false) 15,571,324 7785663
DefineProperties (setter) 16,767,062 8383532
DefineProperties (setter & enumerable=false) 6,242,392 3121197
DefineProperties (setter & enumerable=false & configurable=false) 6,165,505 3082753
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Thu May 09 2024 23:07:08 GMT+0000 (Coordinated Universal Time)

Shallow Copy

name ops/sec samples
{ ...object } 10,304,558 5152280
{ ...object, proto: null } 10,614,453 5307227
{ ...object, newProp: true } 602,119 301550
structuredClone 269,704 134853
JSON.parse + JSON.stringify 187,642 93822
loop + object.keys starting with {} 1,169,998 585000
loop + object.keys starting with { proto: null } 739,087 369544
loop + object.keys starting with { randomProp: true } 552,038 276020
object.keys + reduce(FN, {}) 1,197,894 598948
object.keys + reduce(FN, { proto: null }) 746,665 373333
object.keys + reduce(FN, { newProp: true }) 557,191 278597
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Thu May 09 2024 23:23:37 GMT+0000 (Coordinated Universal Time)

Sorting Map

name ops/sec samples
Sort using default 276,187 138094
Sort using first char 1,201,791 600896
Sort using localeCompare 1,152,474 576238
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Thu May 09 2024 23:31:53 GMT+0000 (Coordinated Universal Time)

Object.assign VS spread operator

name ops/sec samples
{...bigObject} - Total keys: 1000 2,186 1094
{...smallObject} - Total keys: 2 13,567,651 6783826
Object.assign({}, bigObject, anotherBigObject) - Total keys: 1000 - creating new object 2,435 1218
Object.assign(bigObject, anotherBigObject) - mutating bigObject 6,504 3253
{ ...bigObject, ...anotherBigObject } 1,299 650
Object.assign({}, smallObject, anotherSmallObject) - creating new object 6,552,010 3276006
Object.assign(smallObject, anotherSmallObject) - mutating smallObject 10,787,125 5393563
{ ...smallObject, ...anotherSmallObject } 9,372,528 4686265
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Thu May 09 2024 23:39:12 GMT+0000 (Coordinated Universal Time)

String concat

name ops/sec samples
Using + sign 16,870,620 8435311
Using backtick (`) 17,002,751 8501376
Using array.join 6,090,271 3045136
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Thu May 09 2024 23:58:33 GMT+0000 (Coordinated Universal Time)

endsWith comparison

name ops/sec samples
(short string) (true) String#endsWith 13,486,829 6743415
(short string) (true) String#slice and strict comparison 17,310,203 8655102
(long string) (true) String#endsWith 13,569,254 6784628
(long string) (true) String#slice and strict comparison 15,993,587 7996794
(short string) (false) String#endsWith 14,140,092 7070047
(short string) (false) String#slice and strict comparison 16,148,292 8074147
(long string) (false) String#endsWith 13,976,541 6988271
(long string) (false) String#slice and strict comparison 16,272,510 8136256
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Fri May 10 2024 00:07:25 GMT+0000 (Coordinated Universal Time)

String searching

name ops/sec samples
Using includes 17,260,312 8630157
Using indexof 17,233,824 8616913
Using RegExp.test 8,176,747 4088374
Using RegExp.text with cached regex pattern 8,633,317 4316659
Using new RegExp.test 3,036,810 1518406
Using new RegExp.test with cached regex pattern 3,186,542 1593272
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Fri May 10 2024 00:19:02 GMT+0000 (Coordinated Universal Time)

startsWith comparison

name ops/sec samples
(short string) (true) String#startsWith 15,112,195 7556098
(short string) (true) String#slice and strict comparison 17,075,396 8537699
(long string) (true) String#startsWith 14,435,171 7217586
(long string) (true) String#slice and strict comparison 15,901,506 7950754
(short string) (false) String#startsWith 16,003,285 8001643
(short string) (false) String#slice and strict comparison 16,599,503 8299752
(long string) (false) String#startsWith 15,717,258 7858630
(long string) (false) String#slice and strict comparison 16,571,501 8285751
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Fri May 10 2024 00:27:02 GMT+0000 (Coordinated Universal Time)

Super vs This

name ops/sec samples
Using super 15,899,062 7949655
Using this 15,409,177 7704589
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Fri May 10 2024 00:37:38 GMT+0000 (Coordinated Universal Time)

Getting unix time

name ops/sec samples
new Date().getTime() 6,388,841 3194421
Date.now() 8,953,626 4476814
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Fri May 10 2024 00:44:09 GMT+0000 (Coordinated Universal Time)