Benchmark: String Concat vs JSON.stringify

Script Preparation code:

var availableSizes = [];
for(var i=0;i<10000;i++){
  availableSizes.push({label: i, system: i});
}

Tests:

JSON.stringify
var output=[]; for(var i=0, len=availableSizes.length; i<len; i++){ output.push(JSON.stringify(availableSizes[i])); }
String concat
var output=[], SUPER_DELIM = '|', string; for(var i=0, len=availableSizes.length; i<len; i++){ string = Object.keys(availableSizes[i]).reduce(function(str, key) { return str + key + SUPER_DELIM; }, '|'); output.push(string); }

Rendered benchmark preparation results:

Previous results

Test case name	Result
JSON.stringify
String concat

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Latest run results:

Run details: (Test run date: 5 years ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36

Browser/OS: Chrome 68 on Linux

Test name	Executions per second
JSON.stringify	106.9 Ops/sec
String concat	202.9 Ops/sec

String Concat vs JSON.stringify (version: 0)