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RESULTS-v21_7_3.md

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Adding property

name ops/sec samples
Directly in the object 15,213,667 7606834
Using dot notation 15,200,001 7600001
Using define property (writable) 3,301,688 1650845
Using define property initialized (writable) 4,185,349 2092675
Using define property (getter) 2,233,480 1116741
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Mon May 13 2024 18:30:52 GMT+0000 (Coordinated Universal Time)

Array.append (number)

type amount time elapsed
array.push 10 0.004ms
new Array(length) 10 0.001ms
array.push 100 0.021ms
new Array(length) 100 0.012ms
array.push 1,000 0.031ms
new Array(length) 1,000 0.015ms
array.push 10,000 0.268ms
new Array(length) 10,000 0.165ms
array.push 1,000,000 31.021ms
new Array(length) 1,000,000 7.99ms
array.push 100,000,000 1,926.186ms
new Array(length) 100,000,000 4,163.703ms

Array.append (string)

type amount time elapsed
array.push 10 0.005ms
new Array(length) 10 0.003ms
array.push 100 0.016ms
new Array(length) 100 0.011ms
array.push 1,000 0.039ms
new Array(length) 1,000 0.021ms
array.push 10,000 0.327ms
new Array(length) 10,000 0.2ms
array.push 1,000,000 21.771ms
new Array(length) 1,000,000 8.102ms
array.push 100,000,000 2,140.578ms
new Array(length) 100,000,000 4,803.947ms

Array Creation

name ops/sec samples
new Array 237 119
Array.from 23 12
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Mon May 13 2024 18:52:36 GMT+0000 (Coordinated Universal Time)

Comparison using instanceof

name ops/sec samples
[True conditional] Using instanceof only 314,311 157156
[True conditional] Using constructor name 325,194 162598
[True conditional] Check if property is valid then instanceof 332,029 166015
[False conditional] Using instanceof only 15,204,959 7602480
[False conditional] Using constructor name 15,240,681 7620342
[False conditional] Check if property is valid then instanceof 15,280,638 7640320
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Mon May 13 2024 16:44:18 GMT+0000 (Coordinated Universal Time)

Crypto Verify

name ops/sec samples
crypto.createVerify('RSA-SHA256') 7,062 3532
crypto.verify('RSA-SHA256') 7,234 3618
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Mon May 13 2024 16:45:28 GMT+0000 (Coordinated Universal Time)

Date String coersion

name ops/sec samples
Using String() 1,047,862 523932
Using brackets {} 1,088,890 544446
Using '' + 1,080,410 540206
Using date.toString() 1,197,806 598904
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Mon May 13 2024 16:50:00 GMT+0000 (Coordinated Universal Time)

Deleting properties

name ops/sec samples
Using delete property 3,256,232 1628117
Using delete property (proto: null) 8,959,913 4479957
Using delete property (cached proto: null) 3,119,534 1559768
Using undefined assignment 15,407,776 7703889
Using undefined assignment (proto: null) 9,495,478 4747740
Using undefined property (cached proto: null) 15,291,161 7645581
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Mon May 13 2024 16:53:13 GMT+0000 (Coordinated Universal Time)

Node.js Error

name ops/sec samples
Error 297,169 148585
NodeError 292,862 146432
NodeError Range 300,172 150087
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Mon May 13 2024 16:54:18 GMT+0000 (Coordinated Universal Time)

Function return

name ops/sec samples
Function returning null 1,655,530 827766
Function returning explicitly undefined 1,634,714 817358
Function returning implicitly undefined 1,664,746 832378
Function returning string 1,612,879 806440
Function returning integer 1,665,229 832615
Function returning float 1,635,634 817818
Function returning functions 1,601,949 800975
Function returning arrow functions 1,604,881 802441
Function returning empty object 1,634,527 817264
Function returning empty array 1,620,381 810191
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Mon May 13 2024 16:56:05 GMT+0000 (Coordinated Universal Time)

Array.includes vs raw comparison

name ops/sec samples
using Array.includes 15,202,932 7601467
using Array.includes (first item) 15,209,171 7604586
Using raw comparison 15,186,306 7593154
Using raw comparison (first item) 15,235,181 7617591
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Mon May 13 2024 16:58:44 GMT+0000 (Coordinated Universal Time)

Object.keys vs Object.getOwnPropertyNames comparison

name ops/sec samples
Using Object.keys() 13,199,625 6599813
Using Object.getOwnPropertyNames() 13,215,145 6607573
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Mon May 13 2024 16:59:45 GMT+0000 (Coordinated Universal Time)

Get the last item of an Array

name ops/sec samples
Length = 100 - Array.at 15,042,685 7521343
Length = 10_000 - Array.at 15,110,942 7555472
Length = 1_000_000 - Array.at 15,149,506 7574754
Length = 100 - Array[length - 1] 15,071,709 7535855
Length = 10_000 - Array[length - 1] 15,123,403 7561702
Length = 1_000_000 - Array[length - 1] 15,097,466 7548734
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Mon May 13 2024 17:03:19 GMT+0000 (Coordinated Universal Time)

Object Creation

name ops/sec samples
Object.create(null) 12,701,664 6350833
Object.create({}) 1,938,351 969182
Cached Empty.prototype 15,099,375 7549688
Empty.prototype 2,120,079 1060044
Empty class 1,323,167 661584
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Mon May 13 2024 17:04:42 GMT+0000 (Coordinated Universal Time)

Optional Chain (?) vs && operator

name ops/sec samples
Using optional chain (obj.field?.field2) (Valid) 15,145,834 7572919
Using optional chain (obj.field?.field2) (undefined) 15,176,166 7588084
Using and operator (obj.field && obj.field.field2) (Valid) 15,213,603 7606802
Using and operator (obj.field && obj.field.field2) (undefined) 15,259,820 7629911
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Mon May 13 2024 17:06:54 GMT+0000 (Coordinated Universal Time)

Parsing Integer

name ops/sec samples
Using parseInt(x, 10) - small number (2 len) 15,243,681 7621841
Using parseInt(x, 10) - big number (10 len) 15,238,506 7619254
Using + - small number (2 len) 15,246,900 7623451
Using + - big number (10 len) 15,244,565 7622283
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Mon May 13 2024 17:08:31 GMT+0000 (Coordinated Universal Time)

Possible undefined Function

name ops/sec samples
Using if to check function existence 1,139,822 569912
Using ? operator to avoid rejection 1,125,317 562659
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Mon May 13 2024 17:10:47 GMT+0000 (Coordinated Universal Time)

Private Property

name ops/sec samples
Raw usage private field 14,768,999 7384500
Raw usage underscore usage 14,898,631 7449317
Manipulating private properties using # 14,958,599 7479300
Manipulating private properties using underscore(_) 14,916,192 7458097
Manipulating private properties using Symbol 14,959,280 7479641
Manipulating private properties using PrivateSymbol 12,160,257 6080129
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Mon May 13 2024 17:13:14 GMT+0000 (Coordinated Universal Time)

Property access after shape transition

name ops/sec samples
Adding property after object creation - small object 3,753,155 1876578
Adding property in the object creation - small object 3,794,957 1897479
Adding property after the function creation - small class 265,971 132986
Adding property in the function creation - small class 281,229 140615
Adding property after the class creation - small class 273,704 136853
Adding property in the class creation - small class 263,202 131602
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Mon May 13 2024 17:15:55 GMT+0000 (Coordinated Universal Time)

Property Getter Access

name ops/sec samples
Getter (class) 15,232,837 7616419
Getter 13,318,811 6659406
Method 15,261,160 7630581
DefineProperty (getter) 15,259,185 7629593
DefineProperty (getter & enumerable=false) 13,319,534 6659768
DefineProperty (getter & configurable=false) 15,311,462 7655732
DefineProperty (getter & enumerable=false & configurable=false) 13,330,883 6665442
DefineProperty (writable) 15,296,377 7648189
DefineProperty (writable & enumerable=false) 15,291,267 7645634
DefineProperty (writable & enumerable=false & configurable=false) 15,277,680 7638841
DefineProperties (getter) 13,292,623 6646312
DefineProperties (getter & enumerable=false) 13,358,876 6679439
DefineProperties (getter & enumerable=false & configurable=false) 13,344,769 6672385
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Mon May 13 2024 17:18:33 GMT+0000 (Coordinated Universal Time)

Property Setter Access

name ops/sec samples
Setter (class) 15,040,335 7520168
Setter 6,845,937 3422969
Method 15,094,523 7547262
DefineProperty (setter) 15,065,769 7532885
DefineProperty (setter & enumerable=false) 6,801,939 3400970
DefineProperty (setter & configurable=false) 6,749,350 3374676
DefineProperty (setter & enumerable=false & configurable=false) 6,783,788 3391895
DefineProperty (writable) 15,067,285 7533643
DefineProperty (writable & enumerable=false) 15,106,583 7553292
DefineProperty (writable & enumerable=false & configurable=false) 15,105,445 7552723
DefineProperties (setter) 15,106,158 7553080
DefineProperties (setter & enumerable=false) 6,728,232 3364117
DefineProperties (setter & enumerable=false & configurable=false) 6,725,619 3362810
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Mon May 13 2024 17:23:03 GMT+0000 (Coordinated Universal Time)

Shallow Copy

name ops/sec samples
{ ...object } 10,212,001 5106001
{ ...object, proto: null } 2,218,291 1109146
{ ...object, newProp: true } 9,830,326 4915164
structuredClone 278,517 139259
JSON.parse + JSON.stringify 249,025 124513
loop + object.keys starting with {} 1,427,918 713960
loop + object.keys starting with { proto: null } 818,010 409006
loop + object.keys starting with { randomProp: true } 653,085 326543
object.keys + reduce(FN, {}) 1,471,564 735783
object.keys + reduce(FN, { proto: null }) 830,504 415253
object.keys + reduce(FN, { newProp: true }) 666,013 333007
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Mon May 13 2024 17:26:36 GMT+0000 (Coordinated Universal Time)

Sorting Map

name ops/sec samples
Sort using default 326,186 163094
Sort using first char 1,344,727 672364
Sort using localeCompare 1,295,383 647692
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Mon May 13 2024 17:29:28 GMT+0000 (Coordinated Universal Time)

Object.assign VS spread operator

name ops/sec samples
{...bigObject} - Total keys: 1000 2,320 1161
{...smallObject} - Total keys: 2 12,277,303 6138652
Object.assign({}, bigObject, anotherBigObject) - Total keys: 1000 - creating new object 2,467 1234
Object.assign(bigObject, anotherBigObject) - mutating bigObject 6,795 3398
{ ...bigObject, ...anotherBigObject } 1,392 697
Object.assign({}, smallObject, anotherSmallObject) - creating new object 7,086,912 3543457
Object.assign(smallObject, anotherSmallObject) - mutating smallObject 10,641,452 5320727
{ ...smallObject, ...anotherSmallObject } 9,147,047 4573524
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Mon May 13 2024 17:30:56 GMT+0000 (Coordinated Universal Time)

String concat

name ops/sec samples
Using + sign 15,092,581 7546291
Using backtick (`) 15,234,371 7617186
Using array.join 6,265,793 3134682
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Mon May 13 2024 17:36:12 GMT+0000 (Coordinated Universal Time)

endsWith comparison

name ops/sec samples
(short string) (true) String#endsWith 14,477,157 7238579
(short string) (true) String#slice and strict comparison 15,069,165 7534583
(long string) (true) String#endsWith 14,054,654 7027328
(long string) (true) String#slice and strict comparison 15,213,110 7606556
(short string) (false) String#endsWith 15,058,395 7529198
(short string) (false) String#slice and strict comparison 15,103,870 7551936
(long string) (false) String#endsWith 14,647,118 7323560
(long string) (false) String#slice and strict comparison 15,167,030 7583516
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Mon May 13 2024 17:39:19 GMT+0000 (Coordinated Universal Time)

String searching

name ops/sec samples
Using includes 15,164,488 7582245
Using indexof 15,213,527 7606764
Using RegExp.test 7,840,876 3920439
Using RegExp.text with cached regex pattern 7,855,721 3927861
Using new RegExp.test 3,576,048 1788025
Using new RegExp.test with cached regex pattern 3,793,856 1896929
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Mon May 13 2024 17:41:16 GMT+0000 (Coordinated Universal Time)

startsWith comparison

name ops/sec samples
(short string) (true) String#startsWith 14,501,577 7250789
(short string) (true) String#slice and strict comparison 14,579,626 7289814
(long string) (true) String#startsWith 14,077,827 7038914
(long string) (true) String#slice and strict comparison 15,166,929 7583465
(short string) (false) String#startsWith 15,199,994 7599998
(short string) (false) String#slice and strict comparison 15,395,220 7697611
(long string) (false) String#startsWith 14,986,963 7493482
(long string) (false) String#slice and strict comparison 15,439,928 7719965
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Mon May 13 2024 17:44:50 GMT+0000 (Coordinated Universal Time)

Super vs This

name ops/sec samples
Using super 14,902,405 7451203
Using this 15,063,631 7531816
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Mon May 13 2024 17:47:41 GMT+0000 (Coordinated Universal Time)

Getting unix time

name ops/sec samples
new Date().getTime() 6,788,392 3394197
Date.now() 9,030,834 4515418
Environment
  • Machine: linux x64 | 4 vCPUs | 15.2GB Mem
  • Run: Mon May 13 2024 17:49:14 GMT+0000 (Coordinated Universal Time)