Benchmark: Accessing Property of Object Directly vs. Defensively

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

Comparing performance of: Direct Access vs Defensive Check for Existence via If-statement vs Defensive Check for Existence via If-statement using `hasOwnProperty` vs Defensive Check for Existence via Chaining vs Defensive Check for Existence via Chaining using `hasOwnProperty`

Created: 7 years ago by: Registered User

Go to the latest result

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:

Suite status: <idle, ready to run>

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`

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36

Browser/OS: Chrome 133 on Mac OS X 10.15.7

View result in a separate tab

Defensive Check for Existence via If-statement

157.2M/s

Defensive Check for Existence via Chaining

155.8M/s

Direct Access

148.0M/s

Defensive Check for Existence via Chaining using `hasOwnProperty`

63.2M/s

Defensive Check for Existence via If-statement using `hasOwnProperty`

59.4M/s

View exact numbers

Test name	Executions per second
✓ Defensive Check for Existence via If-statement	157,243,008 Ops/sec
Defensive Check for Existence via Chaining	155,806,640 Ops/sec
Direct Access	147,954,960 Ops/sec
Defensive Check for Existence via Chaining using `hasOwnProperty`	63,204,408 Ops/sec
Defensive Check for Existence via If-statement using `hasOwnProperty`	59,439,180 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

LLMs can make mistakes. Check important info.

Let's dive into the benchmark.

**Benchmark Overview**

The provided benchmark compares four different approaches to accessing a property of an object in JavaScript:

1. Direct Access
2. Defensive Check for Existence via If-statement
3. Defensive Check for Existence via Chaining
4. Defensive Check for Existence via Chaining using `hasOwnProperty`

These approaches are compared to determine which one is the most efficient in terms of performance.

**Direct Access**

This approach simply accesses the property directly without any checks or verifications.
```javascript
function directAccess () {
  return response.data.property;
}
```
Pros:

* Simple and straightforward
* No overhead from checks or verifications

Cons:

* May throw an error if `response` is null, undefined, or not an object
* Does not account for potential security risks (e.g., accessing private properties)

**Defensive Check for Existence via If-statement**

This approach uses an if-statement to check if the property exists before accessing it.
```javascript
function defensiveCheckForExistenceViaIfStatement () {
  if (response && response.data && response.data.property) {
    return response.data.property;
  }
}
```
Pros:

* Accounts for potential security risks by ensuring `response` is not null or undefined
* Allows for early termination if the property does not exist

Cons:

* Adds overhead from checks and verifications
* May be slower due to the extra computations involved

**Defensive Check for Existence via Chaining**

This approach uses a chaining mechanism (i.e., calling `&&` operator in sequence) to check if the property exists.
```javascript
function defensiveCheckForExistenceViaChaining () {
  return response && response.data && response.data.property;
}
```
Pros:

* Similar overhead to If-statement approach, but with fewer checks

Cons:

* May be slower due to the chaining mechanism
* Does not account for potential security risks as thoroughly as If-statement approach

**Defensive Check for Existence via Chaining using `hasOwnProperty`**

This approach uses the `hasOwnProperty` method to check if the property exists.
```javascript
function defensiveCheckForExistenceViaChainingUsingHasOwnProperty () {
  return (
    response &&
      Object.prototype.hasOwnProperty.call(response, 'data') &&
      Object.prototype.hasOwnProperty.call(response.data, 'property')
  );
}
```
Pros:

* Accounts for potential security risks by ensuring `response` is not null or undefined
* Allows for early termination if the property does not exist

Cons:

* Adds overhead from checks and verifications
* May be slower due to the extra computations involved

**Library**

None of these approaches rely on a specific library.

**Special JavaScript Features/Syntax**

None mentioned in this benchmark.

**Other Alternatives**

Some alternative approaches that could be explored include:

* Using `in` operator instead of `hasOwnProperty`
* Using `try-catch` block to catch errors
* Using memoization or caching to reduce the number of checks
* Using a library like Lodash or Ramda for utility functions

Keep in mind that the choice of approach depends on the specific use case and requirements.

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

Comparing performance of: Direct Access vs Defensive Check for Existence via If-statement vs Defensive Check for Existence via If-statement using `hasOwnProperty` vs Defensive Check for Existence via Chaining vs Defensive Check for Existence via Chaining using `hasOwnProperty`

Created: 7 years ago by: Registered User

Go to the latest 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`

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

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