Benchmark: Accessing Property of Object Directly vs. Defensively

Accessing Property of Object Directly vs. Defensively (version: 9)

Script Preparation code:

var response = {
  data: {
    property: "value",
  },
};

Tests:

Direct Access
function directAccess () { return response.data.property; } directAccess();
Defensive Check for Existence via If-statement
function defensiveCheckForExistenceViaIfStatement () { if (response && response.data && response.data.property) { return response.data.property; } } defensiveCheckForExistenceViaIfStatement();
Defensive Check for Existence via If-statement using `hasOwnProperty`
function defensiveCheckForExistenceViaIfStatementUsingHasOwnProperty () { if (response && Object.prototype.hasOwnProperty.call(response, 'data') && Object.prototype.hasOwnProperty.call(response.data, 'property') ) { return response.data.property; } } defensiveCheckForExistenceViaIfStatementUsingHasOwnProperty();
Defensive Check for Existence via Chaining
function defensiveCheckForExistenceViaChaining () { return response && response.data && response.data.property; } defensiveCheckForExistenceViaChaining();
Defensive Check for Existence via Chaining using `hasOwnProperty`
function defensiveCheckForExistenceViaChainingUsingHasOwnProperty () { return ( response && Object.prototype.hasOwnProperty.call(response, 'data') && Object.prototype.hasOwnProperty.call(response.data, 'property') ); } defensiveCheckForExistenceViaChainingUsingHasOwnProperty();

Rendered benchmark preparation results:

Previous results

Test case name	Result
Direct Access
Defensive Check for Existence via If-statement
Defensive Check for Existence via If-statement using `hasOwnProperty`
Defensive Check for Existence via Chaining
Defensive Check for Existence via Chaining using `hasOwnProperty`

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Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.72 Safari/537.36

Browser/OS: Chrome 90 on Mac OS X 10.15.7

Test name	Executions per second
Direct Access	13266970.0 Ops/sec
Defensive Check for Existence via If-statement	3426160.0 Ops/sec
Defensive Check for Existence via If-statement using `hasOwnProperty`	1501161.0 Ops/sec
Defensive Check for Existence via Chaining	4574887.0 Ops/sec
Defensive Check for Existence via Chaining using `hasOwnProperty`	1750021.0 Ops/sec