Benchmark: JS BigInt big number performance

Script Preparation code:

var bigInt1 = 1000000n
var bigInt2 = 5000000n
var number1 = 1000000
var number2 = 5000000

Tests:

BigInt
a = bigInt1 b = bigInt2 c = a - b c = a % b c = a * b c = a + b c = a ** b
Number
a = number1 b = number2 c = a - b c = a % b c = a * b c = a + b c = a ** b

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
BigInt
Number

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one month ago)

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:136.0) Gecko/20100101 Firefox/136.0

Browser/OS: Firefox 136 on Linux

View result in a separate tab

Test name	Executions per second
BigInt	0.0 Ops/sec
Number	18624706.0 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated 6 months ago):

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark.

**What is being tested?**

The benchmark compares the performance of two data types in JavaScript: `Number` and `BigInt`. Specifically, it tests the performance of arithmetic operations (`-`, `%`, `*`, `+`, and `**`) on large numbers represented as either `Number` or `BigInt`.

**Options compared**

There are two options being compared:

1. **Number**: The traditional JavaScript number type, which uses 64-bit floating-point representation.
2. **BigInt**: A relatively new data type introduced in ECMAScript 2020, designed to support arbitrarily large integers.

**Pros and cons of each approach:**

* **Number**:
	+ Pros: Wide compatibility with existing JavaScript code, simple implementation.
	+ Cons: Limited precision for very large numbers, potential performance issues due to floating-point arithmetic.
* **BigInt**:
	+ Pros: Supports arbitrarily large integers, precise arithmetic operations, and improved performance for large numbers.
	+ Cons: Newer data type, may require changes to existing JavaScript code.

**Library used**

The benchmark uses the `BigInt` library, which is a polyfill that provides support for `BigInt` in older browsers that don't natively support it. This allows the benchmark to run on a wider range of environments.

**Special JS feature or syntax**

This benchmark doesn't explicitly use any special JavaScript features or syntax beyond what's required for testing the `Number` and `BigInt` data types. However, it's worth noting that modern JavaScript engines are optimized for performance and may take advantage of certain browser-specific features or optimizations.

**Other alternatives**

If you were to write a similar benchmark from scratch, you might consider using:

1. **Benchmarks like JSHint**: A popular testing tool specifically designed for testing JavaScript code.
2. **Benchmarking libraries like Benchmark.js**: Specialized libraries that provide more advanced benchmarking features and tools.

Keep in mind that the specific implementation details may vary depending on your goals, requirements, and target audience.

**Benchmark preparation code**

The provided `Script Preparation Code` initializes variables with large numbers for both `Number` and `BigInt`, ensuring consistent test cases:

```javascript
var bigInt1 = 1000000n;
var bigInt2 = 5000000n;
var number1 = 1000000;
var number2 = 5000000;
```

**Individual test cases**

The benchmark defines two individual test cases, each with a different approach:

Test case 1: **BigInt**
```javascript
a = bigInt1
b = bigInt2
c = a - b
c = a % b
c = a * b
c = a + b
c = a ** b
```

Test case 2: **Number**
```javascript
a = number1
b = number2
c = a - b
c = a % b
c = a * b
c = a + b
c = a ** b
```

Both test cases perform the same arithmetic operations, but using `Number` and `BigInt`, respectively.

Related benchmarks:

JS BigInt big number performance (version: 0)

Compare Number vs BigInt for big numbers

Comparing performance of: BigInt vs Number

Created: 2 years ago by: Guest

Jump to the latest result

BigInt

Number

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 6 months ago):