Run results for: JSON.stringify.indexOf vs For loop

Run details:
User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36
Browser: Chrome 91
Operating system: Windows
Device Platform: Desktop
Date tested: 2 years ago
Test name	Executions per second
JSON.stringify.indexOf	6503.2 Ops/sec
For loop	28015.9 Ops/sec
Script Preparation code:
a=[
	{
		"AttributeName": "eee",
		"New": "Kate",
		"Old": "Winifred"
	},
	{
		"AttributeName": "eee",
		"New": "Viviene",
		"Old": "Brooks"
	},
	{
		"AttributeName": "bbb",
		"New": "Fayre",
		"Old": "Moyna"
	},
	{
		"AttributeName": "bbb",
		"New": "Camile",
		"Old": "Tani"
	},
	{
		"AttributeName": "aaa",
		"New": "Sherrie",
		"Old": "Cordi"
	},
	{
		"AttributeName": "fff",
		"New": "Xylina",
		"Old": "Marcelline"
	},
	{
		"AttributeName": "ccc",
		"New": "Ruthe",
		"Old": "Elie"
	},
	{
		"AttributeName": "ccc",
		"New": "Marleah",
		"Old": "Minne"
	},
	{
		"AttributeName": "eee",
		"New": "Felice",
		"Old": "Carolina"
	},
	{
		"AttributeName": "bbb",
		"New": "Fina",
		"Old": "Alie"
	},
	{
		"AttributeName": "bbb",
		"New": "Rubie",
		"Old": "Dennie"
	},
	{
		"AttributeName": "bbb",
		"New": "Shirlee",
		"Old": "Dulcinea"
	},
	{
		"AttributeName": "ddd",
		"New": "Dawn",
		"Old": "Rani"
	},
	{
		"AttributeName": "eee",
		"New": "Courtnay",
		"Old": "Janeczka"
	},
	{
		"AttributeName": "ccc",
		"New": "Jean",
		"Old": "Leona"
	},
	{
		"AttributeName": "fff",
		"New": "Karina",
		"Old": "Rochette"
	},
	{
		"AttributeName": "bbb",
		"New": "Chickie",
		"Old": "Penelopa"
	},
	{
		"AttributeName": "fff",
		"New": "Lorenza",
		"Old": "Tera"
	},
	{
		"AttributeName": "ddd",
		"New": "Meg",
		"Old": "Millie"
	},
	{
		"AttributeName": "fff",
		"New": "Thalia",
		"Old": "Cam"
	},
	{
		"AttributeName": "ddd",
		"New": "Lilith",
		"Old": "Jeanna"
	},
	{
		"AttributeName": "aaa",
		"New": "Grier",
		"Old": "Yolane"
	},
	{
		"AttributeName": "aaa",
		"New": "Lynnea",
		"Old": "Kerrin"
	},
	{
		"AttributeName": "ccc",
		"New": "Ekaterina",
		"Old": "Jillayne"
	},
	{
		"AttributeName": "aaa",
		"New": "Blinni",
		"Old": "Esmeralda"
	},
	{
		"AttributeName": "eee",
		"New": "Kimberley",
		"Old": "Ulrike"
	},
	{
		"AttributeName": "ccc",
		"New": "Shauna",
		"Old": "Sue"
	},
	{
		"AttributeName": "bbb",
		"New": "Averyl",
		"Old": "Emylee"
	},
	{
		"AttributeName": "fff",
		"New": "Ebonee",
		"Old": "Adore"
	},
	{
		"AttributeName": "bbb",
		"New": "Sheree",
		"Old": "Phylis"
	},
	{
		"AttributeName": "bbb",
		"New": "Roberta",
		"Old": "Constance"
	},
	{
		"AttributeName": "eee",
		"New": "Agnese",
		"Old": "Jenilee"
	},
	{
		"AttributeName": "fff",
		"New": "Ardeen",
		"Old": "Rubie"
	},
	{
		"AttributeName": "ccc",
		"New": "Kathy",
		"Old": "Minda"
	},
	{
		"AttributeName": "fff",
		"New": "Christal",
		"Old": "Stephanie"
	},
	{
		"AttributeName": "ddd",
		"New": "Hettie",
		"Old": "Tersina"
	},
	{
		"AttributeName": "bbb",
		"New": "Janey",
		"Old": "Bill"
	},
	{
		"AttributeName": "eee",
		"New": "Ira",
		"Old": "Sallie"
	},
	{
		"AttributeName": "fff",
		"New": "Tonia",
		"Old": "Clary"
	},
	{
		"AttributeName": "fff",
		"New": "Paola",
		"Old": "Wilma"
	},
	{
		"AttributeName": "aaa",
		"New": "Esmeralda",
		"Old": "Gui"
	},
	{
		"AttributeName": "ccc",
		"New": "Sibella",
		"Old": "Sybille"
	},
	{
		"AttributeName": "ccc",
		"New": "Beth",
		"Old": "Misha"
	},
	{
		"AttributeName": "ddd",
		"New": "Olwen",
		"Old": "Alisha"
	},
	{
		"AttributeName": "eee",
		"New": "Emelina",
		"Old": "Jany"
	},
	{
		"AttributeName": "bbb",
		"New": "Hannis",
		"Old": "Sean"
	},
	{
		"AttributeName": "ddd",
		"New": "Magdalena",
		"Old": "Kayla"
	},
	{
		"AttributeName": "bbb",
		"New": "Roxane",
		"Old": "Mildrid"
	},
	{
		"AttributeName": "eee",
		"New": "Steffane",
		"Old": "Rosene"
	},
	{
		"AttributeName": "fff",
		"New": "Monika",
		"Old": "Philis"
	},
	{
		"AttributeName": "aaa",
		"New": "Ulrike",
		"Old": "Ida"
	},
	{
		"AttributeName": "ccc",
		"New": "Dale",
		"Old": "Wanda"
	},
	{
		"AttributeName": "ccc",
		"New": "Kayla",
		"Old": "Ileana"
	},
	{
		"AttributeName": "ddd",
		"New": "Gale",
		"Old": "Sarette"
	},
	{
		"AttributeName": "bbb",
		"New": "Bobinette",
		"Old": "Imojean"
	},
	{
		"AttributeName": "fff",
		"New": "Debee",
		"Old": "Trixi"
	},
	{
		"AttributeName": "aaa",
		"New": "Almeta",
		"Old": "Linzy"
	},
	{
		"AttributeName": "bbb",
		"New": "Zsa Zsa",
		"Old": "Heida"
	},
	{
		"AttributeName": "fff",
		"New": "Beverley",
		"Old": "Elyssa"
	},
	{
		"AttributeName": "bbb",
		"New": "Jaclyn",
		"Old": "Kenna"
	},
	{
		"AttributeName": "fff",
		"New": "Katleen",
		"Old": "Sara-Ann"
	},
	{
		"AttributeName": "ddd",
		"New": "Ebonee",
		"Old": "Lindie"
	},
	{
		"AttributeName": "ccc",
		"New": "Meriel",
		"Old": "Berta"
	},
	{
		"AttributeName": "ddd",
		"New": "Mary",
		"Old": "Leanna"
	},
	{
		"AttributeName": "aaa",
		"New": "Robbi",
		"Old": "Kassey"
	},
	{
		"AttributeName": "fff",
		"New": "Lexine",
		"Old": "Alejandra"
	},
	{
		"AttributeName": "eee",
		"New": "Natka",
		"Old": "Kayla"
	},
	{
		"AttributeName": "aaa",
		"New": "Tori",
		"Old": "Gabriellia"
	},
	{
		"AttributeName": "ddd",
		"New": "Romona",
		"Old": "Anallese"
	},
	{
		"AttributeName": "eee",
		"New": "Genevra",
		"Old": "Consuela"
	},
	{
		"AttributeName": "ccc",
		"New": "Eolanda",
		"Old": "Joceline"
	},
	{
		"AttributeName": "ccc",
		"New": "Tersina",
		"Old": "Kary"
	},
	{
		"AttributeName": "bbb",
		"New": "Molli",
		"Old": "Annecorinne"
	},
	{
		"AttributeName": "ddd",
		"New": "Rosaline",
		"Old": "Dari"
	},
	{
		"AttributeName": "fff",
		"New": "Carol-Jean",
		"Old": "Kerrin"
	},
	{
		"AttributeName": "eee",
		"New": "Alie",
		"Old": "Daune"
	},
	{
		"AttributeName": "ccc",
		"New": "Carilyn",
		"Old": "Ekaterina"
	},
	{
		"AttributeName": "fff",
		"New": "Bobinette",
		"Old": "Dagmar"
	},
	{
		"AttributeName": "eee",
		"New": "Susette",
		"Old": "Anica"
	},
	{
		"AttributeName": "ccc",
		"New": "Jordan",
		"Old": "Roberta"
	},
	{
		"AttributeName": "eee",
		"New": "Dianemarie",
		"Old": "Eve"
	},
	{
		"AttributeName": "bbb",
		"New": "Darlleen",
		"Old": "Katharina"
	},
	{
		"AttributeName": "fff",
		"New": "Morganica",
		"Old": "Edee"
	},
	{
		"AttributeName": "aaa",
		"New": "Sean",
		"Old": "Anthia"
	},
	{
		"AttributeName": "aaa",
		"New": "Jennica",
		"Old": "Joy"
	},
	{
		"AttributeName": "ddd",
		"New": "Briney",
		"Old": "Cyndie"
	},
	{
		"AttributeName": "bbb",
		"New": "Iseabal",
		"Old": "Caritta"
	},
	{
		"AttributeName": "fff",
		"New": "Melisent",
		"Old": "Merle"
	},
	{
		"AttributeName": "fff",
		"New": "Glenda",
		"Old": "Lindie"
	},
	{
		"AttributeName": "ddd",
		"New": "Ernesta",
		"Old": "Correy"
	},
	{
		"AttributeName": "bbb",
		"New": "Jobi",
		"Old": "Julieta"
	},
	{
		"AttributeName": "eee",
		"New": "Glynnis",
		"Old": "Maye"
	},
	{
		"AttributeName": "bbb",
		"New": "Gratia",
		"Old": "Christy"
	},
	{
		"AttributeName": "ddd",
		"New": "Celisse",
		"Old": "Chandra"
	},
	{
		"AttributeName": "ddd",
		"New": "Brena",
		"Old": "Dominga"
	},
	{
		"AttributeName": "eee",
		"New": "Dennie",
		"Old": "Celestyna"
	},
	{
		"AttributeName": "fff",
		"New": "Gusty",
		"Old": "Darlleen"
	},
	{
		"AttributeName": "ddd",
		"New": "Marleah",
		"Old": "Leanna"
	},
	{
		"AttributeName": "bbb",
		"New": "Dawn",
		"Old": "Tiffie"
	},
	{
		"AttributeName": "eee",
		"New": "Bobinette",
		"Old": "Selma"
	}
];
Tests:
JSON.stringify.indexOf
var changes = []; if (JSON.stringify(a).indexOf('aaa') > -1) { for(var i=0;i<a.length;i++) { if (JSON.stringify(a[i]).indexOf('aaa') > -1) { changes.push(a[i].New); } } }
For loop
var changes = []; for(var i=0;i<a.length;i++) { if (a[i].AttributeName === 'aaa') { changes.push(a[i].New); } }