Benchmark: large string size comparison

Script Preparation code:

let s1MB = "0123456789".repeat(1000*100);
var strings1MB = Array.from(Array(20)).map(o=>s1MB + String.fromCharCode(32+~~(Math.random()*96)))

Tests:

string comparison
const s1 = strings1MB[~~(strings1MB.length*Math.random())]; const s2 = strings1MB[~~(strings1MB.length*Math.random())]+"a"; const b = s1 === s2;
string length comparison
const s1 = strings1MB[~~(strings1MB.length*Math.random())]; const s2 = strings1MB[~~(strings1MB.length*Math.random())]+"a"; const b = s1.length === s2.length;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
string comparison
string length comparison

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:129.0) Gecko/20100101 Firefox/129.0

Browser/OS: Firefox 129 on Windows

View result in a separate tab

Test name	Executions per second
string comparison	326450336.0 Ops/sec
string length comparison	322187232.0 Ops/sec

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

LLMs can make mistakes. Check important info.

I'll break down the provided JSON and explain what's being tested, compared, and their pros and cons.

**Benchmark Definition**

The benchmark definition is a set of rules that defines the test to be performed. In this case, it has three parts:

1. **Script Preparation Code**: This code sets up the data used in the benchmark. It creates an array `strings1MB` containing 20 large strings with random characters appended (space to z).
2. **Html Preparation Code**: This field is empty, which means no HTML setup is required.
3. **Description**: A brief description of the benchmark, which explains that it tests worst-case large string comparison.

**Individual Test Cases**

There are two test cases:

1. **String Comparison**: The script creates two random strings from `strings1MB`, checks if they are equal (`s1 === s2`), and records the result.
2. **String Length Comparison**: Similar to the previous test case, but instead of checking for equality, it compares the lengths of the two strings (`s1.length === s2.length`).

**What is being tested?**

The benchmark tests two different approaches:

* String comparison using the `===` operator
* String length comparison

These tests aim to measure how JavaScript handles large string comparisons and length checks.

**Pros and Cons of Different Approaches**

1. **String Comparison (`===`)**:
	* Pros: Simple, efficient, and widely supported by browsers.
	* Cons: May be slower for very large strings due to the overhead of string comparison algorithms.
2. **String Length Comparison**:
	* Pros: More accurate for checking if two strings have the same length, which can be important in certain applications (e.g., data validation).
	* Cons: May not be as efficient or performant as string comparison using `===`.

**Library and Special JS Features**

There is no explicit library mentioned in the benchmark definition. However, the use of `Array.from` and `String.fromCharCode` suggests that JavaScript 2015 features are being used.

No special JavaScript features (e.g., async/await, Promises) are explicitly mentioned, but the benchmark's focus on measuring performance might imply a need for optimization techniques, which could involve using such features to improve code readability and maintainability.

**Other Alternatives**

If you wanted to create a similar benchmark with different test cases or variations, you might consider:

* Using different data types (e.g., numbers, booleans) instead of strings.
* Adding more complex data structures (e.g., arrays, objects) to the script preparation code.
* Introducing noise or stressors into the benchmark (e.g., concurrent executions, external network requests) to simulate real-world scenarios.
* Using different browsers or versions to test compatibility and optimization.

Related benchmarks:

large string size comparison (version: 0)

Worst case large string comparison.

Comparing performance of: string comparison vs string length comparison

Created: one year ago by: Guest

Jump to the latest result

string comparison

string length comparison

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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