Benchmark: string vs string.toString()

Tests:

string.toString()
let num = 'dzqzqdqzqzjhdzkqjhkqzhjkqzhkjqzhkjqzhkjdqzhkjqzdhkjqzdhkjqzhdkjh'; let nums = []; for(let i = 0; i < 10000; ++i) { nums.push(num.toString()); }
string
let num = 'dzqzqdqzqzjhdzkqjhkqzhjkqzhkjqzhkjqzhkjdqzhkjqzdhkjqzdhkjqzhdkjh'; let nums = []; for(let i = 0; i < 10000; ++i) { nums.push(num); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
string.toString()
string

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.36

Browser/OS: Chrome 110 on Linux

View result in a separate tab

Test name	Executions per second
string.toString()	11715.1 Ops/sec
string	19885.3 Ops/sec

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

LLMs can make mistakes. Check important info.

**Benchmark Overview**

The provided benchmark compares two approaches to convert a string to another data type in JavaScript: concatenating strings using the `+` operator or converting the string to an array of its length using the `toString()` method.

**Options Compared**

There are two test cases:

1. **"string"`**: This approach uses concatenation to create an array of the input string's characters.
2. **"string.toString()"**: This approach converts the input string to a number (its ASCII code) and then pushes it to an array.

**Pros and Cons**

* **"string"`**:
	+ Pros: Simple, straightforward implementation.
	+ Cons: May lead to performance issues due to repeated concatenation operations. Each concatenation creates a new string object, which can be expensive in terms of memory allocation and garbage collection.
* **"string.toString()"**:
	+ Pros: More efficient than concatenation, as it avoids creating intermediate string objects.
	+ Cons: Requires converting the string to an integer (its ASCII code), which may not be desirable if the input string contains non-ASCII characters.

**Library Usage**

There is no explicit library usage in these benchmarks. However, the `toString()` method used in the second test case relies on the built-in JavaScript `String.prototype.toString()` method, which is a part of the standard JavaScript library.

**Special JS Features or Syntax**

None of the tests explicitly use special JavaScript features or syntax beyond what is required to express the benchmarked logic. However, it's worth noting that the use of `let` and `const` for variable declarations is a modern JavaScript feature introduced in ECMAScript 2015 (ES6).

**Alternative Approaches**

Other approaches could be considered:

* Using a library like Lodash or Underscore.js to implement string manipulation utilities.
* Comparing performance using other data types, such as numbers or booleans.
* Adding more test cases to cover edge cases, such as empty strings, null values, or Unicode characters.

Keep in mind that these alternatives might not be directly relevant to the specific benchmark at hand, but they could be interesting areas for further exploration.

Related benchmarks:

string vs string.toString() (version: 0)

Comparing performance of: string.toString() vs string

Created: one year ago by: Guest

Jump to the latest result

string.toString()

string

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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