Benchmark: set.has vs. array.includes vs array.indexOf (string values) (larger array)

Script Preparation code:

var a = [
  '37241', '96319', '52521', '16796', '87238', '39323', '27422',
  '78861', '81540', '26141', '74036', '8303',  '40329', '80380',
  '28341', '28535', '94356', '21929', '70975', '98537', '21501',
  '92484', '76106', '44172', '665',   '40245', '71772', '55320',
  '89832', '32229', '7304',  '49297', '90851', '53689', '56748',
  '67062', '34113', '15361', '2289',  '58200', '38020', '89356',
  '87300', '31974', '64847', '845',   '68298', '25015', '54251',
  '38934', '11187', '2369',  '28441', '64364', '85695', '5919',
  '92528', '71464', '97459', '47787', '64679', '30597', '62341',
  '42741', '76494', '88530', '68824', '2687',  '37601', '63412',
  '47751', '8369',  '92027', '16061', '24488', '8770',  '8300',
  '23375', '21438', '72630', '92509', '75681', '63572', '93839',
  '47026', '32125', '20530', '13655', '76497', '49878', '99364',
  '45033', '97440', '16391', '79167', '99069', '26298', '68934',
  '14747', '21457', '61073', '29848', '77268', '4100', '16401',
  '24507', '45303', '83745', '62804', '81564', '19502', '9722',
  '49883', '89558', '55945', '35359', '9066',  '44952', '67710',
  '95944', '94903', '27919', '10125', '56451', '4187',  '18930',
  '74652', '57167', '41531', '65896', '77043', '73464', '7407',
  '64455', '1850',  '38006', '89774', '44339', '26733', '75224',
  '13006', '85492', '22483', '66549', '69263', '99496', '10651',
  '61043', '25884', '31556', '31714', '71374', '80413', '85557',
  '88927', '79710', '93793', '6453',  '28511', '73630', '63316',
  '88249', '68838', '12549', '23654', '85430', '19949', '36938',
  '12337', '13660', '73739', '19337', '88910', '55152', '61634',
  '35095', '94093', '53976', '25265', '72575', '68584', '46164',
  '37418', '90329', '9464',  '21276', '54760', '15145', '39863',
  '95204', '90533', '28253', '32941', '84199', '35499', '54816',
  '46668', '5244',  '44675', '39585', '82033', '19748', '77991',
   '78937', '55524', '29417', '51724', '2206',  '34282', '85394',
  '1602',  '64661', '45571', '27832', '87572', '44452', '53533',
  '40522', '985',   '29454', '41842', '37534', '71051', '21307',
  '2040',  '28310', '94203', '20364', '56626', '36067', '24594',
  '3817',  '99158', '74740', '81174', '16583', '94423', '60072',
  '44335', '46024', '19190', '9299',  '11817', '72929', '37118',
  '45504', '56345', '7610',  '25020', '85835', '58474', '91075',
  '91350', '3565',  '2189',  '54590', '38617', '60255', '83487',
  '14380', '44759', '3705',  '93542', '55619', '79873', '22785',
  '70772', '77124', '15265', '951',   '86164', '36567', '37202',
  '22886', '5255',  '16517', '25144', '27928', '32354', '82417',
  '34082', '27432', '89110', '48559', '59596', '19817', '67643',
  '26704', '42770', '24023', '13978', '49390', '37656', '17095',
  '2783',  '94873', '94280', '20976', '2374',  '98549', 

];

Tests:

includes
return a.includes('63412')
set lookup
var b = new Set(a) return b.has('63412')
indexof
return a.indexOf('63412') >= 0

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
includes
set lookup
indexof

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.36

Browser/OS: Chrome 107 on Windows

View result in a separate tab

Test name	Executions per second
includes	16208232.0 Ops/sec
set lookup	138777.8 Ops/sec
indexof	6929806.5 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the benchmark and its test cases.

**Benchmark Definition**

The benchmark definition is not provided, but based on the individual test cases, we can infer that it involves looking up a value in an array or set to determine whether it exists.

**Individual Test Cases**

There are three test cases:

1. **"includes"`**: This test case checks if the `a` array contains a specific value (`'63412'`) using the `includes()` method.
2. **"set lookup"`**: This test case creates a new Set object from the `a` array and then looks up a specific value (`'63412'`) in it using the `has()` method.
3. **"indexof"`**: This test case checks if the `a` array contains a specific index that corresponds to a particular value (`'63412'`) using the `indexOf()` method.

**Latest Benchmark Result**

The latest benchmark result shows the execution times for each test case across different browsers and devices:

1. **"includes"`**: The fastest execution time is 6.9295 milliseconds, achieved by Chrome 107 on a desktop Windows device.
2. **"indexof"`**: The fastest execution time is 3.4214 milliseconds, also achieved by Chrome 107 on a desktop Windows device.
3. **"set lookup"`**: The fastest execution time is 1.4236 milliseconds, again achieved by Chrome 107 on a desktop Windows device.

**Comparison**

Based on the benchmark results, it appears that:

* `includes()` is slower than both `indexof()` and `set lookup()`.
* `indexof()` is faster than `set lookup()`.
* Both `indexof()` and `set lookup()` are significantly faster than `includes()`.

It's worth noting that these results may vary depending on the specific implementation and optimizations used by each browser. However, based on this benchmark, it seems that `indexof()` and `set lookup()` are generally faster than `includes()`.

Related benchmarks:

set.has vs. array.includes vs array.indexOf (string values) (larger array) (version: 0)

Comparing performance of: includes vs set lookup vs indexof

Created: 3 years ago by: Guest

Jump to the latest result

includes

set lookup

indexof

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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