Run results for: String Concat vs JSON.stringify

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:70.0) Gecko/20100101 Firefox/70.0

Browser: Firefox 70

Operating system: Mac OS X 10.14

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
JSON.stringify	174.9 Ops/sec
String concat	980.5 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); }