Benchmark: spreadArray - MeasureThat.net

Script Preparation code:

var testArray = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'.split('');
var delim = {'a': 1};

function spreadArrayComparisonAndConcat(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 spreadArrayComparison(array, delim) {
    return array.reduce(function (result, item, i) {
         if (i === 0) {
           result.push(item);
         } else {
           result.push(delim, item);
         }
      
        return result;
    }, []);
}

function spreadArrayComparisonArrow(array, delim) {
    return array.reduce((result, item, i) => {
         if (i === 0) {
           result.push(item);
         } else {
           result.push(delim, item);
         }
      
        return result;
    }, []);
}

function spreadArrayPop(array, delim) {
    var r = array.reduce(function (result, item) {
        result.push(item, delim);      
        return result;
    }, []);
    r.pop();
    return r;
}

function spreadArrayShift(array, delim) {
    var r = array.reduce(function (result, item) {
        result.push(delim, item);      
        return result;
    }, []);
    r.shift();
    return r;
}

function spreadArraySlice(array, delim) {
    return array.reduce(function (result, item) {
        result.push(delim, item);      
        return result;
    }, []).slice(1);
}

function spreadArrayTailSlice(array, delim) {
    return array.reduce(function (result, item) {
        result.push(delim, item);
        
        return result;
    }, []).slice(0, -1);
}

function spreadArraySlice2(array, delim) {
    return array.slice(1).reduce(function (result, item) {
        result.push(delim, item);      
        return result;
    }, []);
}


function spreadArrayFor(arr, delim) {
    var result = [];
    for (var i = 0; i < arr.length; i++) {
    	result.push(arr[i], delim);
    };
    result.pop();
    return result;
}

function spreadArrayForReverse(arr, delim) {
    var result = []
    for (var i = arr.length - 1; i >= 0; i--) {
        result.unshift(arr[i], delim);
    };
    result.pop();
    return result;
}

function spreadArrayForComparison(arr, delim) {
    var result = [];
    for (var i = 0; i < arr.length; i++) {
      	if (i === 0) {
          result.push(arr[i]);
        } else {
          result.push(delim, arr[i]);
        }
    };
    return result;
}

function spreadArrayForWithInit(arr, delim) {
    var result = [arr[0]]
    for (var i = 1; i < arr.length; i++) {      	
        result.push(delim, arr[i]);
    };
    return result;
}

Tests:

ComparisonAndConcat
spreadArrayComparisonAndConcat(testArray, delim);
Concat
spreadArrayConcat(testArray, delim);
Comparison
spreadArrayComparison(testArray, delim);
Pop
spreadArrayPop(testArray, delim);
Shift
spreadArrayShift(testArray, delim);
Slice
spreadArraySlice(testArray, delim);
TailSlice
spreadArrayTailSlice(testArray, delim);
Slice2
spreadArraySlice2(testArray, delim);
For
spreadArrayFor(testArray, delim);
ForReverse
spreadArrayForReverse(testArray, delim);
ForComparison
spreadArrayForComparison(testArray, delim);
ForWithInit
spreadArrayForWithInit(testArray, delim);
spreadArrayComparisonArrow
spreadArrayComparisonArrow(testArray, delim);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
ComparisonAndConcat
Concat
Comparison
Pop
Shift
Slice
TailSlice
Slice2
For
ForReverse
ForComparison
ForWithInit
spreadArrayComparisonArrow

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

This benchmark does not have any results yet. Be the first one to run it!

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

LLMs can make mistakes. Check important info.

Related benchmarks:

spreadArray (version: 0)

Function that works like a join, but returns array

Comparing performance of: ComparisonAndConcat vs Concat vs Comparison vs Pop vs Shift vs Slice vs TailSlice vs Slice2 vs For vs ForReverse vs ForComparison vs ForWithInit vs spreadArrayComparisonArrow

Created: 9 years ago by: Registered User

Jump to the latest result

ComparisonAndConcat

Concat

Comparison

Pop

Shift

Slice

TailSlice

Slice2

For

ForReverse

ForComparison

ForWithInit

spreadArrayComparisonArrow

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

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