Benchmark: spreadArray - MeasureThat.net

Script Preparation code:

var testArray = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'.split('');
var delim = {'a': 1};

function spreadArrayErtema(array, delim) {
    return array.reduce(function (result, item) {
        result.push(delim, item);
        
        return result;
    }, []).slice(0, -1);
}

function spreadArrayKbakba(arr, delim) {
    var result = []
    for (var i = arr.length - 1; i >= 0; i--) {
        result.unshift(arr[i], delim);
    };
    result.pop();
    return result;
}


function spreadArrayComparsionAndConcat(array, delim) {
    return array.reduce(function (result, item, i) {
        return i === 0 ? result.concat(item) : result.concat(delim, item);
    }, []);
}

function spreadArrayConcat(array, delim) {
    return array.reduce(function (result, item, i) {
        return result.concat(delim, item);
    }, []).slice(0, -1);
}

function spreadArrayComparsion(array, delim) {
    return array.reduce(function (result, item, i) {
         if (i === 0) {
           result.push(item);
         } else {
           result.push(delim, item);
         }
      
        return result;
    }, []);
}

Tests:

spreadArray by ertema
spreadArrayErtema(testArray, delim);
spreadArray by kbakba
spreadArrayKbakba(testArray, delim);
spreadArray with comparsion and concat
spreadArrayComparsionAndConcat(testArray, delim);
spreadArray with concat only
spreadArrayConcat(testArray, delim);
spreadArray with comparsion only
spreadArrayComparsion(testArray, delim);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
spreadArray by ertema
spreadArray by kbakba
spreadArray with comparsion and concat
spreadArray with concat only
spreadArray with comparsion only

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 7 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.113 Safari/537.36

Browser/OS: Chrome 53 on Windows

View result in a separate tab

Test name	Executions per second
spreadArray by ertema	406580.0 Ops/sec
spreadArray by kbakba	270247.7 Ops/sec
spreadArray with comparsion and concat	45962.0 Ops/sec
spreadArray with concat only	40481.9 Ops/sec
spreadArray with comparsion only	472395.6 Ops/sec

spreadArray (version: 2)

Function that works like a join, but returns array

Comparing performance of: spreadArray by ertema vs spreadArray by kbakba vs spreadArray with comparsion and concat vs spreadArray with concat only vs spreadArray with comparsion only

Created: 7 years ago by: Registered User

Jump to the latest result

spreadArray by ertema

spreadArray by kbakba

spreadArray with comparsion and concat

spreadArray with concat only

spreadArray with comparsion only

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A