Benchmark: String format vs join

Tests:

normal string format
const a = '12345678901234567890123456789012' const b = '12345678901234567890123456789012' console.log(`${a}-${b}`)
join strings
const a = '12345678901234567890123456789012' const b = '12345678901234567890123456789012' console.log([a, b].join('-'))

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
normal string format
join strings

Fastest: N/A

Slowest: N/A

Latest run results:

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

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Let's dive into the world of JavaScript microbenchmarks.

**What is being tested?**

The provided JSON represents two test cases for measuring the performance difference between using string formatting (`${a}-${b}`) and concatenating strings with the `join()` method. The test cases are identical, except that one uses string formatting and the other uses the `join()` method.

**Options being compared:**

1. **String formatting**: Using template literals (e.g., `${a}-${b}`) to concatenate strings.
2. **Concatenation with join()**: Using the `join()` method to concatenate strings.

**Pros and Cons of each approach:**

* **String formatting**:
	+ Pros:
		- More readable and maintainable code
		- Can be used for more complex expressions (e.g., ${a + b} * 2)
		- Less prone to errors due to the need for quotes around variables
	+ Cons:
		- May incur a performance overhead due to the parsing and evaluation of the template literal expression.
* **Concatenation with join()**:
	+ Pros:
		- Can be faster than string formatting, as it avoids the overhead of parsing and evaluating a template literal expression.
		- More flexible, as it can handle more complex concatenations (e.g., `[a, b].join('-')`).
	+ Cons:
		- Less readable and maintainable code
		- Prone to errors due to the need for quotes around variables and potential issues with variable order.

**Library usage:**

In this benchmark, there is no explicit library used. However, some modern JavaScript engines (e.g., V8) provide built-in support for template literals through their `String.prototype` methods.

**Special JS feature or syntax:**

There are no special features or syntaxes mentioned in the provided JSON. The benchmark focuses on comparing two common string concatenation techniques.

**Other alternatives:**

Alternative approaches to string formatting and concatenation include:

* Using a library like Lodash, which provides various string manipulation functions (e.g., `lodash.escape`).
* Utilizing other string formatting methods, such as the `%` operator in Node.js's built-in `console.log()` function.
* Employing libraries or frameworks that provide more advanced string manipulation capabilities, such as React's JSX or Angular's template literals.

Keep in mind that these alternatives might not be relevant to this specific benchmark, which focuses on the performance comparison between string formatting and concatenation with the `join()` method.

Related benchmarks:

String format vs join (version: 0)

Comparing performance of: normal string format vs join strings

Created: 3 years ago by: Guest

Jump to the latest result

normal string format

join strings

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

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