Benchmark: Template string vs array join

Tests:

Template string slicing
const id = '10135533-2332-4012-aada-b36571a05399'; `${id.slice(1, 8)}${id.slice(9, 13)}${id.slice(15, 18)}`
Array push and join
const id = '10135533-2332-4012-aada-b36571a05399'; const timeStampParts = [] const chars = id.split('') let index = 0 for (const char of chars) { if ( (index !== 0 && index < 8) || (index >= 9 && index < 13) || (index >= 15 && index < 18) ) { timeStampParts.push(char) } index += 1 } const timestamp = timeStampParts.join('')

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Template string slicing
Array push and join

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/134.0.0.0 Safari/537.36

Browser/OS: Chrome 134 on Linux

View result in a separate tab

Test name	Executions per second
Template string slicing	49319032.0 Ops/sec
Array push and join	3402783.5 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark definition and test cases.

**Benchmark Definition**

MeasureThat.net is a website where users can create and run JavaScript microbenchmarks. The provided JSON represents the benchmark, which includes:

* `Name`: "Template string vs array join"
* `Description`: null (empty)
* `Script Preparation Code` and `Html Preparation Code`: null (empty)

In summary, this benchmark compares two approaches for extracting a specific substring from a larger string: template strings and arrays.

**Test Cases**

There are two test cases:

1. **Template string slicing**
	* The benchmark definition is: `${id.slice(1, 8)}${id.slice(9, 13)}${id.slice(15, 18)}`
	* This code uses the `slice()` method to extract specific parts of the `id` string and concatenates them using template strings.
2. **Array push and join**
	* The benchmark definition is: `const timeStampParts = [] ... const timestamp = timeStampParts.join('')`
	* This code creates an array, pushes specific characters into it, and then joins the array into a single string.

**Options Compared**

The two approaches being compared are:

1. **Template String Slicing**: Using template strings to concatenate substrings.
2. **Array Push and Join**: Creating an array, pushing specific characters into it, and then joining the array into a single string using `join()` method.

**Pros and Cons**

Here's a brief summary of the pros and cons of each approach:

**Template String Slicing**

Pros:

* Concise and readable code
* Less memory allocation required

Cons:

* May not be as efficient for large strings due to template string creation and concatenation
* Requires JavaScript engine support for template strings (available in most modern browsers)

**Array Push and Join**

Pros:

* Can be more efficient for large strings since array allocation is done in batches
* Available in older browsers that don't support template strings

Cons:

* More verbose code
* Requires extra memory allocation for the array

**Other Considerations**

* **Memory Allocation**: Both approaches have different memory allocation patterns, which can impact performance.
* **String Interpolation**: Template strings provide a convenient way to insert values into strings, but may incur additional overhead.

**Library and Features Used**

No specific libraries are mentioned in the benchmark definition. However, some features used include:

* `slice()` method for substring extraction
* Template strings (available in modern browsers) for string concatenation

If test users use special JS features or syntax, it's not explicitly mentioned in this example.

**Alternatives**

Some alternative approaches to compare in a similar benchmark could be:

1. **Using regular expressions**: Extracting the desired substring using regex patterns.
2. **Using a custom implementation**: Creating a custom function to extract the substring, which might provide better performance or control over the extraction process.
3. **Using a different string manipulation method**: Employing other methods like `substr()` or `substring()` for substring extraction.

These alternatives can provide additional insights into the performance of various approaches and help optimize the code.

Related benchmarks:

Template string vs array join (version: 0)

Comparing performance of: Template string slicing vs Array push and join

Created: 5 years ago by: Guest

Jump to the latest result

Template string slicing

Array push and join

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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