Run results for: var is a non-empty array (v2)

Run details:

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/114.0

Browser: Firefox 114

Operating system: Ubuntu

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
IsArray (array)	102162696.0 Ops/sec
IsArray (null)	119560152.0 Ops/sec
typecheck (nullable dot) (array)	320817952.0 Ops/sec
typecheck (nullable dot) (null)	470962688.0 Ops/sec
manual check cond (array)	420352160.0 Ops/sec
manual check cond (null)	698253568.0 Ops/sec
typeof obj + length (array)	431785728.0 Ops/sec
typeof obj + length (null)	717073856.0 Ops/sec

Script Preparation code:

var arr = [1,2,3];
var notArr = null;

Tests:

IsArray (array)
Array.isArray(arr) && arr.length > 0
IsArray (null)
Array.isArray(notArr) && notArr.length > 0
typecheck (nullable dot) (array)
arr?.length > 0 && arr[0] !== undefined
typecheck (nullable dot) (null)
notArr?.length > 0 && notArr[0] !== undefined
manual check cond (array)
arr !== null && arr !== undefined && arr.length > 0 && arr[0] !== undefined
manual check cond (null)
notArr !== null && notArr !== undefined && notArr.length > 0 && notArr[0] !== undefined
typeof obj + length (array)
typeof arr === 'object' && arr !== null && arr.length > 0 && arr[0] !== undefined
typeof obj + length (null)
typeof notArr === 'object' && notArr !== null && notArr.length > 0 && notArr[0] !== undefined