Benchmark: JS unshift vs splice vs unshift + splice (3 possibilities) FINAL RESULT!

Script Preparation code:

var data1 = [];
for(i=0; i<10000; i++){data1.push(i);}
var data2 = [];
for(i=0; i<10000; i++){data2.push(i);}
var data3 = [];
for(i=0; i<10000; i++){data2.push(i);}

Tests:

Unshift with find
const rest = data1.filter(item => item !== 500); rest.unshift(data1.find(item => item == 500)); return rest;
Splice with findIndex
const cautelarPosition = data2.findIndex(item => item == 500); data2.splice(0, 0, data2.splice(cautelarPosition, 1)[0]); return data2;
unshift with Splice
const cautelarIndex = data3.findIndex(item => item == 500); data3.unshift(data3.splice(cautelarIndex, 1)[0]); return data3;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Unshift with find
Splice with findIndex
unshift with Splice

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36 OPR/114.0.0.0

Browser/OS: Opera 114 on Linux

View result in a separate tab

Test name	Executions per second
Unshift with find	14520.5 Ops/sec
Splice with findIndex	42831.5 Ops/sec
unshift with Splice	2809841.8 Ops/sec

Related benchmarks:

JS unshift vs splice vs unshift + splice (3 possibilities) FINAL RESULT! (version: 4)

Comparing performance of: Unshift with find vs Splice with findIndex vs unshift with Splice

Created: 4 years ago by: Registered User

Jump to the latest result

Unshift with find

Splice with findIndex

unshift with Splice

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A