Benchmark: Which equals operator (== vs ===) is faster with string comparison larger?

Tests:

test equality
var n = 0; while(true) { n++; if(`${n}`==`9900000`) break; }
test strict equality
var n = 0; while(true) { n++; if(`${n}`===`9900000`) break; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
test equality
test strict equality

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 15_6_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.6.1 Mobile/15E148 Safari/604.1

Browser/OS: Mobile Safari 15 on iOS 15.6.1

View result in a separate tab

Test name	Executions per second
test equality	2.9 Ops/sec
test strict equality	2.8 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into explaining the provided benchmark.

**Benchmark Purpose**

The goal of this benchmark is to compare the performance difference between using the `==` (equality operator) and `===` (strict equality operator) operators when comparing strings in JavaScript.

**Options Compared**

There are two options being compared:

1. **Using `==` (Equality Operator)**: This operator checks if the values on both sides of the operator are equal, ignoring data types.
2. **Using `===` (Strict Equality Operator)**: This operator checks if the values on both sides of the operator are equal and of the same data type.

**Pros and Cons**

* **Using `==`**:
	+ Pros: Easier to read and write code, as it's more forgiving when comparing variables.
	+ Cons: Can lead to unexpected results due to type coercion, which can be a security risk if not handled carefully.
* **Using `===`**:
	+ Pros: Provides more accurate results, as it checks for both value and data type equality.
	+ Cons: More verbose code, as you need to specify the expected data type.

**Library and Special Features**

There is no library being used in this benchmark. However, note that some JavaScript engines (like V8) have features like **"Object.prototype.hasOwnProperty.call" optimization**, which can influence performance comparisons between `==` and `===`. But these optimizations are not explicitly mentioned in the provided benchmark.

**Other Considerations**

When writing code with string comparisons, it's essential to consider the following:

* Always use `===` when comparing strings to ensure accurate results.
* Avoid using `==` for security-sensitive areas of your code, as it can lead to unexpected behavior or security vulnerabilities.
* Be mindful of type coercion and how it affects equality checks.

**Alternatives**

If you're looking for alternative benchmarks or want to explore other JavaScript performance topics, here are some resources:

* **jsbench**: Another popular online benchmarking platform for JavaScript.
* **Benchmarking with V8**: If you're interested in exploring the specific optimizations used by the V8 engine, you can refer to official documentation and sources like the Chromium bug tracker.
* **JavaScript Performance Testing Frameworks**: Libraries like Jest, Mocha, or Benchmark.js can help you write more comprehensive performance tests for your JavaScript applications.

I hope this explanation helps you understand what's being tested in MeasureThat.net!

Related benchmarks:

Which equals operator (== vs ===) is faster with string comparison larger? (version: 0)

Is there a performance benefit to replacing == with ===?

Comparing performance of: test equality vs test strict equality

Created: 2 years ago by: Guest

Jump to the latest result

test equality

test strict equality

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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