Benchmark: Which equals operator (== vs === vs != vs !== ) is faster?

Tests:

test equality
var n = 0; while(true) { n++; if(n==100000) break; }
test strict equality
var n = 0; while(true) { n++; if(n===100000) break; }
test inequality
var n = 0; while(true) { n++; if(n!=100000) break; }
test strict inequality
var n = 0; while(true) { n++; if(n!==100000) break; }

Historical Performance Data aggregated from 27 community runs

Desktop Results:

Chrome 18 runs

test strict inequality

108.2M/s

test inequality

105.9M/s

test equality

25K/s

test strict equality

25K/s

Fastest: test strict inequality (4371.6x faster)

View exact numbers

✓ test strict inequality: 108,190,496 ops/sec
• test inequality: 105,923,648 ops/sec
• test equality: 25,140 ops/sec
• test strict equality: 24,749 ops/sec

Firefox 9 runs

test inequality

580.0M/s

test strict inequality

579.5M/s

test equality

20K/s

test strict equality

20K/s

Fastest: test inequality (28430.6x faster)

View exact numbers

✓ test inequality: 579,981,504 ops/sec
• test strict inequality: 579,537,600 ops/sec
• test equality: 20,417 ops/sec
• test strict equality: 20,400 ops/sec

Results show median performance across all community submissions. Run this benchmark yourself to verify on your device.

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
test equality
test strict equality
test inequality
test strict inequality

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 17 days ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.0

Browser/OS: Firefox 152 on Windows

View result in a separate tab

test inequality

223.0M/s

test strict inequality

222.9M/s

test strict equality

10K/s

test equality

10K/s

View exact numbers

Test name	Executions per second
✓ test inequality	222,993,056 Ops/sec
test strict inequality	222,887,264 Ops/sec
test strict equality	10,401 Ops/sec
test equality	10,216 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks on MeasureThat.net.

**Benchmark Definition**

The benchmark definition represents a script that is executed to test the performance of different equality operators in JavaScript. The script uses an infinite while loop to iterate from 0 to 100,000, and checks if the current value `n` matches one of four conditions: equal (`==`), strict equal (`===`), not equal (`!=`), or strict not equal (`!==`). The benchmark is designed to measure which operator is faster.

**Options being compared**

The benchmark compares the performance of four different equality operators:

1. **Strict Equality (`===`)**: Checks if two values are both equal and of the same data type.
2. **Non-strict Equality (`==`)**: Checks if two values are equal, but does not enforce data type consistency.
3. **Not Equal (`!=`)**: Checks if two values are not equal.
4. **Strict Not Equal (`!==`)**: Checks if two values are neither equal nor of the same data type.

**Pros and Cons**

Here's a brief summary of each operator:

* **Strict Equality (`===`)**:
	+ Pros: Ensures strict equality, which is important for avoiding potential type coercion issues.
	+ Cons: Can be slower due to the additional checks required.
* **Non-strict Equality (`==`)**:
	+ Pros: Faster than `===`, but may introduce type coercion issues if not handled carefully.
	+ Cons: Less reliable and more prone to errors, especially when dealing with incompatible data types.
* **Not Equal (`!=`)**:
	+ Pros: Simple and fast, but may not be sufficient for all use cases (e.g., comparing floating-point numbers).
	+ Cons: Does not provide any useful information about the equality of two values; it only indicates whether they are different.
* **Strict Not Equal (`!==`)**:
	+ Pros: Combines the benefits of `===` and `!=`, providing strict inequality while avoiding potential type coercion issues.
	+ Cons: Similar to `===`, may be slower due to additional checks.

**Library usage**

There is no explicit library mentioned in the benchmark definition, but it's likely that MeasureThat.net uses a built-in JavaScript engine or a wrapper around popular engines like V8 (used by Chrome) or SpiderMonkey (used by Firefox).

**Special JS feature or syntax**

There are no special JavaScript features or syntaxes explicitly used in this benchmark. The script is straightforward and focuses on demonstrating the performance differences between four basic equality operators.

**Other alternatives**

If you're interested in exploring alternative approaches, here are some options:

* **TypeScript**: While not specifically designed for benchmarks, TypeScript's type system can provide additional insights into equality operator performance by enforcing strict type checking.
* **ES6+ features**: Newer JavaScript features like `Math.abs()` or `Number.isInteger()` might be more efficient for specific use cases. However, their inclusion would require modifications to the benchmark definition.
* **Alternative engines or compilers**: Measuring the performance of different JavaScript engines or compilers (e.g., V8, SpiderMonkey, or even Node.js's built-in engine) could provide interesting results, especially if you're interested in optimizing for specific platforms or use cases.

Keep in mind that these alternatives would require significant modifications to the benchmark definition and script preparation code.

I hope this explanation helps! If you have any further questions or need clarification on specific aspects of the benchmark, feel free to ask.

Which equals operator (== vs === vs != vs !== ) is faster? (version: 0)

Comparing performance of: `test equality vs test strict equality vs test inequality vs test strict inequality`

Created: 3 years ago by: Guest

Go to the latest result

test equality

test strict equality

test inequality

test strict inequality

Historical Performance Data aggregated from 27 community runs

Desktop Results:

Chrome 18 runs

Firefox 9 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

Which equals operator (== vs === vs != vs !== ) is faster? (version: 0)

Comparing performance of: test equality vs test strict equality vs test inequality vs test strict inequality

Created: 3 years ago by: Guest

Go to the latest result

test equality

test strict equality

test inequality

test strict inequality

Historical Performance Data aggregated from 27 community runs

Desktop Results:

Chrome 18 runs

Firefox 9 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

Related benchmarks

Comparing performance of: `test equality vs test strict equality vs test inequality vs test strict inequality`