Benchmark: array indexing forEach vs reduce 2

Script Preparation code:

var arr = [];
for (id=1;id<1000;id++) arr.push({id,name:Math.random().toString(36).substring(7)})
var pk = 'id,name';
var pkarr = pk.split(',')
var acc={};

Tests:

reduce array key
arr.reduce((acc,row) => { acc[pkarr.map((col)=>row[col]).join(',')]=row; return acc; },{})
foreach array key
arr.forEach(row => acc[pkarr.map((col)=>row[col]).join(',')]=row);
foreach simple key
arr.forEach(row => acc[row.id+','+row.name]=row);
foreach simple template
arr.forEach(row => acc[`${row.id},${row.name}`]=row);
reduce simple key
arr.reduce((acc,row) => { acc[row.id+','+row.name]=row; return acc; },{})
reduce simple template
arr.reduce((acc,row) => { acc[`${row.id},${row.name}`]=row; return acc; },{})

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
reduce array key
foreach array key
foreach simple key
foreach simple template
reduce simple key
reduce simple template

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:79.0) Gecko/20100101 Firefox/79.0

Browser/OS: Firefox 79 on Windows

View result in a separate tab

Test name	Executions per second
reduce array key	2490.5 Ops/sec
foreach array key	3808.1 Ops/sec
foreach simple key	5740.2 Ops/sec
foreach simple template	5790.3 Ops/sec
reduce simple key	3417.8 Ops/sec
reduce simple template	3393.7 Ops/sec

array indexing forEach vs reduce 2 (version: 1)

Comparing performance of: reduce array key vs foreach array key vs foreach simple key vs foreach simple template vs reduce simple key vs reduce simple template

Created: 3 years ago by: Registered User

Jump to the latest result

reduce array key

foreach array key

foreach simple key

foreach simple template

reduce simple key

reduce simple template

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A