Benchmark: check number vs check object (lodash)

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

var val = 5;
var obj = {"a": 2};

Tests:

num
Number.isFinite(val);
obj
_.isObject(obj);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
num
obj

Fastest: N/A

Slowest: N/A

Latest run results:

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

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**Benchmark Definition Json**

The provided JSON represents a benchmark definition, which is a set of instructions for running a specific test case. It contains three essential parts:

1. **Name and Description**: The name of the benchmark, in this case, "check number vs check object (lodash)". Unfortunately, there's no description provided.
2. **Script Preparation Code**: This code snippet is executed before each test run to set up the environment for the tests. In this example, it creates two variables: `val` with the value 5 and `obj` as an object with a single property "a" equal to 2.
3. **Html Preparation Code**: This code snippet is included in the HTML document to load an external JavaScript library. In this case, it loads the Lodash library version 4.17.5.

**Individual Test Cases**

The benchmark definition contains two test cases:

1. `num`: This test case runs the expression `Number.isFinite(val)`, which checks if the value of `val` is a finite number.
2. `obj`: This test case runs the expression `_.isObject(obj)`, which checks if the object `obj` is an instance of Object (i.e., it has the prototype chain and no additional properties).

**Options Compared**

The two test cases compare two different ways to check if a value is finite:

1. **Number.isFinite()**: This method takes a single argument, the value to be checked, and returns a boolean indicating whether the value is a finite number.
2. **_.isObject() + typeof obj === 'object'**: This approach first checks if the object `obj` is an instance of Object using Lodash's `isObject()` function, and then uses the `typeof` operator to check if the result is equal to 'object'. This method relies on the fact that objects have a prototype chain and additional properties.

**Pros and Cons**

Here are some pros and cons for each approach:

1. **Number.isFinite()**:
	* Pros:
		+ Short and concise
		+ Efficient, as it only requires a single operation
	* Cons:
		+ May not work correctly with certain primitive values (e.g., NaN, infinity)
2. **_.isObject() + typeof obj === 'object'**:
	* Pros:
		+ More robust, as it works with all types of objects
	* Cons:
		+ Less concise and more computationally expensive due to the use of `typeof` and object type checking

**Libraries**

The Lodash library is used in this benchmark. Lodash provides a set of utility functions that make common programming tasks easier, such as string manipulation, array operations, and object transformations. In this case, it's used for its `isObject()` function, which checks if an object has the prototype chain and no additional properties.

**Special JS Features or Syntax**

There are no special JavaScript features or syntax mentioned in the benchmark definition or test cases. However, it's worth noting that some modern JavaScript versions (e.g., ECMAScript 2015+) have introduced new syntax and features that may not be supported by older browsers like Chrome 87.

**Other Alternatives**

If you're looking for alternative ways to check if a value is finite, you can consider the following:

1. **IsFinite()**: This method is similar to `Number.isFinite()` but takes an object as an argument.
2. **typeof obj === 'number'**: This approach uses the `typeof` operator to check if the object `obj` has the property "number", which would indicate that it's a finite number.

Keep in mind that these alternatives may not be as robust or efficient as the approaches used in the benchmark definition.

Related benchmarks:

check number vs check object (lodash) (version: 0)

Comparing performance of: num vs obj

Created: 5 years ago by: Guest

Jump to the latest result

num

obj

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):