Benchmark: Optional Chaining versus _.get lodash 2020 yq

Script Preparation code:

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

Tests:

Optional Chaining
// Compiled code from TSC // obj?.a?.b?.c?.d ?? 2 // badObj?.a?.b?.c?.d ?? 2 "use strict"; var _a, _b, _c, _d, _e, _f, _g, _h, _j, _k; _e = (_d = (_c = (_b = (_a = obj) === null || _a === void 0 ? void 0 : _a.a) === null || _b === void 0 ? void 0 : _b.b) === null || _c === void 0 ? void 0 : _c.c) === null || _d === void 0 ? void 0 : _d.d, (_e !== null && _e !== void 0 ? _e : 2); _k = (_j = (_h = (_g = (_f = badObj) === null || _f === void 0 ? void 0 : _f.a) === null || _g === void 0 ? void 0 : _g.b) === null || _h === void 0 ? void 0 : _h.c) === null || _j === void 0 ? void 0 : _j.d, (_k !== null && _k !== void 0 ? _k : 2);
Lodash
_.get(obj, ['a', 'b', 'c', 'd'], 2) _.get(badObj, ['a', 'b', 'c', 'd'], 2)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Optional Chaining
Lodash

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 benchmark and explain what is being tested, compared, and their pros and cons.

**What is being tested?**

The benchmark compares two approaches for accessing nested object properties: JavaScript's optional chaining (`?.`) and Lodash's `_.get()` function. Specifically, it tests the performance of these approaches on a simple test case with two objects: `obj` and `badObj`.

**Script Preparation Code**

The script preparation code defines two variables:

* `obj`: an object with nested properties `{a: {b: {c: {d: 1}}}}`.
* `badObj`: an empty object (`{}`).

This setup creates a simple scenario where the optional chaining and Lodash's `_get()` function are used to access the nested property `d`.

**Benchmark Definition**

The benchmark definition is a JavaScript code snippet that uses both approaches:

* Optional Chaining: `obj?.a?.b?.c?.d ?? 2`
* Lodash's `_get()`: `_.get(obj, ['a', 'b', 'c', 'd'], 2)`

Both expressions are equivalent and test the performance of each approach.

**What options are compared?**

The two options being compared are:

1. **JavaScript's Optional Chaining (`?.`)**: a built-in feature introduced in ECMAScript 2020 that allows safe navigation through nested objects.
2. **Lodash's `_get()` function**: a utility function from the Lodash library that provides a way to safely access nested object properties.

**Pros and Cons of each approach:**

1. **JavaScript's Optional Chaining (`?.`)**:
	* Pros:
		+ Built-in, native feature, which means it's highly optimized for performance.
		+ Simple and readable syntax.
	* Cons:
		+ May not be supported in older browsers or JavaScript engines.
2. **Lodash's `_get()` function**:
	* Pros:
		+ Widely supported by most modern browsers and JavaScript engines.
		+ Provides a flexible way to access nested properties using arrays or strings.
	* Cons:
		+ Adds an additional dependency on the Lodash library.
		+ May have overhead due to the extra function call.

**Other considerations**

* The benchmark assumes that the input objects are valid and will not throw any errors. In a real-world scenario, you may need to handle edge cases and error checking.
* The `??` operator (nullish coalescing) is used to provide a default value of 2 if the expression evaluates to null or undefined.

**Alternatives**

If you prefer not to use optional chaining, you can also consider using other methods like:

* Bracket notation (`obj['a']['b']['c']['d']`)
* Property access with dot notation (`obj.a.b.c.d`)

However, these approaches have different performance characteristics and may be less readable than the optional chaining or Lodash's `_get()` function.

Related benchmarks:

Optional Chaining versus _.get lodash 2020 yq (version: 2)

A quick performance test between lodash and native optional chaining.

Comparing performance of: Optional Chaining vs Lodash

Created: 6 years ago by: Registered User

Jump to the latest result

Optional Chaining

Lodash

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):