Benchmark: typeof eqeq vs typeof eqeqeq

Tests:

===
for(let i = 0; i < 1000; i++) { if(typeof i === 'number') { } }
==
for(let i = 0; i < 1000; i++) { if(typeof i == 'number') { } }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
===
==

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/144.0.0.0 Safari/537.36

Browser/OS: Chrome 144 on Linux

View result in a separate tab

Test name	Executions per second
===	754246.2 Ops/sec
==	846328.6 Ops/sec

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 its components.

**Benchmark Definition**
The benchmark is defined in JSON format, which provides metadata about the test case. In this case:

* The name of the benchmark is "typeof eqeq vs typeof eqeqeq".
* There is no description for the benchmark.
* No script preparation code or HTML preparation code are provided.

The benchmark tests two different approaches to check if a variable `i` is a number:
	1. Using the exact syntax `typeof i === 'number'`.
	2. Using an older syntax `typeof i == 'number'`.

**Individual Test Cases**
Two test cases are defined:

* Case 1 uses the modern syntax `==` for equality comparison and checks if `i` is a number.
* Case 2 uses the older syntax `==` for equality comparison, but with a missing operator (`===` would be used instead).

The difference between these two test cases lies in the syntax used to check the type of `i`. The modern syntax `===` is more precise and reliable than the older `==`, as it checks both value and type equality.

**Library and Special JS Features**
There are no libraries mentioned in the provided benchmark. However, there is a special JavaScript feature being tested: the difference between `===` (strict equality) and `==` (loose equality).

**Pros and Cons of Different Approaches**

* Using `typeof i === 'number'`: This approach provides more accurate results as it checks both value and type equality.
	+ Pros:
		- More precise
		- Better support for modern JavaScript syntax
	+ Cons:
		- May be slower due to the additional check
* Using `typeof i == 'number'`: This approach is older and less reliable than the first one.
	+ Pros:
		- Faster (due to fewer checks)
	+ Cons:
		- Less precise, as it only checks value equality
		- May produce incorrect results for certain inputs

**Other Alternatives**

If you wanted to compare these approaches using a different method, you could consider the following alternatives:

* Using `Number.isInteger(i)` (ECMAScript 2015) instead of `typeof i === 'number'`.
* Using `i instanceof Number` (ECMAScript 2020) instead of `typeof i === 'number'`.

Keep in mind that these alternatives might not be supported by all browsers or environments, so ensure to test them thoroughly before relying on them.

In summary, the provided benchmark tests two different approaches to check if a variable is a number. The modern syntax `===` is more precise and reliable than the older `==`, but may be slower due to additional checks.

Related benchmarks:

typeof eqeq vs typeof eqeqeq (version: 0)

Comparing performance of: === vs ==

Created: 2 years ago by: Guest

Jump to the latest result

===

==

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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