Run results for: String Concat vs JSON.stringify

Run details:

User agent: Mozilla/5.0 (Linux; Android 8.0.0; SAMSUNG-SM-G891A) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.136 Mobile Safari/537.36

Browser: Chrome Mobile 74

Operating system: Android 8.0.0

Device Platform: Mobile

Date tested: 5 years ago

Test name	Executions per second
JSON.stringify	35.7 Ops/sec
String concat	114.7 Ops/sec

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 = ' }~\t|{ '; for(var i=0, len=availableSizes.length; i<len; i++){ output.push(availableSizes[i].label + SUPER_DELIM + availableSizes[i].system); }