Benchmark: optionally chain me up on valentimes day - no safeword

Script Preparation code:

var obj = {a: {b: {c: {d: 1}}}}

Tests:

optionally chaining deez
let val = obj?.a?.b?.c?.d;
if deez
let val; if( obj && obj.a && obj.a.b && obj.a.b.c && obj.a.b.c.d) { val = obj.a.b.c.d;}

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
optionally chaining deez
if deez

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

This benchmark does not have any results yet. Be the first one to run it!

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what's being tested.

**Benchmark Definition**

The benchmark is defined by two JSON objects, which represent different test cases.

1. The first object defines a script preparation code, where an object `obj` is created with nested properties:
   ```javascript
var obj = {a: {b: {c: {d: 1}}}}
```
   This creates a hierarchical structure for the variable `val`, which we'll explore later.

2. The second object defines another script preparation code, where an object `obj` is created but without nested properties:
   ```javascript
var obj = {a: {b: {c: {d: 1}}}}
```
   This creates a similar hierarchical structure for the variable `val`, but with fewer nested properties.

**Individual Test Cases**

There are two test cases:

1. "optionally chaining deez"
   The benchmark definition is:
   ```javascript
let val = obj?.a?.b?.c?.d;
```
   In this case, we're trying to access the value of `val` by optionally chaining the nested properties. This is achieved using the nullish coalescing operator (`??`) and optional chaining (`?.`). The nullish coalescing operator returns the first operand if it's not null or undefined, and the second operand otherwise. Optional chaining allows us to safely navigate through a hierarchical object without throwing an error.

2. "if deez"
   The benchmark definition is:
   ```javascript
let val;
if (obj && obj.a && obj.a.b && obj.a.b.c && obj.a.b.c.d) { val = obj.a.b.c.d; }
```
   In this case, we're trying to access the value of `val` by checking if all the nested properties exist in the object `obj`.

**Options Compared**

The two test cases are testing the performance difference between:

1. Optional chaining (`?.`) and nullish coalescing operator (`??`)
2. A nested approach using optional chaining (`?.`) vs a flat approach without nesting (using only conditional checks)

**Pros and Cons**

Here's a brief analysis of each approach:

**Optional Chaining (`?.`)**

Pros:

* More concise and expressive
* Reduces the chance of null pointer exceptions
* Can be used for function calls as well

Cons:

* May have performance overhead due to additional operations
* Not supported in older browsers or environments that don't support ECMAScript 2020 (ES10)

**Nullish Coalescing Operator (`??`)**

Pros:

* Fast and efficient, with minimal overhead
* Supports all browsers and environments that support ECMAScript 2017 (ES7)
* Can be used for function calls as well

Cons:

* Less concise than optional chaining
* Requires explicit null checks

**Flat Approach**

Pros:

* Faster execution time due to reduced nesting operations
* More compatible with older browsers or environments

Cons:

* May lead to more errors due to null pointer exceptions
* Less readable and maintainable code

**Other Considerations**

* In both test cases, the object `obj` is created with a hierarchical structure. This means that the benchmark is also testing how JavaScript handles nested objects.
* The `if deez` test case uses an older syntax (without optional chaining or nullish coalescing operator), which may not be as efficient as the `optionally chaining deez` test case.

**Alternatives**

If you want to create similar benchmarks, here are some alternatives:

1. Use a library like Jest or Mocha to write and run JavaScript tests.
2. Create a benchmarking framework using Node.js, Webpack, or another tool.
3. Write a custom benchmarking script in Python or another language to compare the performance of different approaches.

I hope this explanation helps you understand the benchmark and its test cases!

Related benchmarks:

optionally chain me up on valentimes day - no safeword (version: 0)

Comparing performance of: optionally chaining deez vs if deez

Created: 3 years ago by: Guest

Jump to the latest result

optionally chaining deez

if deez

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

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