Benchmark: var is a non-empty array (v3)

Script Preparation code:

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

Tests:

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

Rendered benchmark preparation results:

Previous results

Test case name	Result
IsArray
typecheck (nullable dot) (array)
manual check cond
typeof obj + length
manual check with null-coalescing

Latest run results:

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Related benchmarks:

var is a non-empty array (v3) (version: 0)