Benchmark: .toString() concatenation vs array join with compiledFunc

Script Preparation code:

var array = [{a:"asd",b:5,c:null,d:new Date()},{a:"bcd",b:6,c:void 0,d:new Date()},{a:"efg",b:8,c:-1,d:new Date()}]
var compiledFuncConcat = new Function("data", "return String((data&&data.a))+String((data&&data.b))+String((data&&data.c))+String((data&&data.d));");
var compiledFuncJoin = new Function("data", "return [(data&&data.a),(data&&data.b),(data&&data.c),(data&&data.d)].join('');");

Tests:

String concat
var resultArr=[]; for(let i=0, ii = 10000; i<ii; i++){ resultArr.push(compiledFuncConcat(array[i%array.length])) }
String join
var resultArr=[]; for(let i=0, ii = 10000; i<ii; i++){ resultArr.push(compiledFuncJoin(array[i%array.length])); }
string join directly
var resultArr=[]; for(let i=0, ii = 10000; i<ii; i++){ let data = array[i%array.length]; resultArr.push([(data&&data.a),(data&&data.b),(data&&data.c),(data&&data.d)].join('')); }
String concat directly
var resultArr=[]; for(let i=0, ii = 10000; i<ii; i++){ let data = array[i%array.length]; resultArr.push(String((data&&data.a))+String((data&&data.b))+String((data&&data.c))+String((data&&data.d))); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
String concat
String join
string join directly
String concat directly

Fastest: N/A

Slowest: N/A

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Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:102.0) Gecko/20100101 Firefox/102.0

Browser/OS: Firefox 102 on Windows

View result in a separate tab

Test name	Executions per second
String concat	58.4 Ops/sec
String join	35.3 Ops/sec
string join directly	34.5 Ops/sec
String concat directly	59.2 Ops/sec

.toString() concatenation vs array join with compiledFunc (version: 0)

Comparing performance of: String concat vs String join vs string join directly vs String concat directly

Created: 7 months ago by: Guest

Jump to the latest result

String concat

String join

string join directly

String concat directly

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A