Benchmark: Random test1 - MeasureThat.net

Tests:

split
const params = 'random str'; const other = params.split('');
spread
const params = 'random str'; const other = [ ...params ];

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
split
spread

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 4 years ago)

User agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.138 Safari/537.36

Browser/OS: Chrome 81 on Windows 7

View result in a separate tab

Test name	Executions per second
split	9329225.0 Ops/sec
spread	13434784.0 Ops/sec

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

LLMs can make mistakes. Check important info.

I'd be happy to explain the benchmark and its results.

**Benchmark Overview**

The provided JSON represents a simple JavaScript microbenchmark test case. The test measures the performance of two different approaches for string manipulation: splitting a string using the `split()` method versus spreading an array from the string.

**Script Preparation Code**

The script preparation code is empty, which means that no specific setup or initialization code is required to run the benchmark.

**Html Preparation Code**

Similarly, the HTML preparation code is also empty, indicating that no HTML-specific setup or configuration is needed for this test.

**Library Usage**

There is no explicit library usage mentioned in the benchmark definition. However, it's worth noting that the `split()` method is a built-in JavaScript function, while the spread operator (`[ ...params ]`) is supported by most modern browsers due to its implementation in ECMAScript 2015 (ES6).

**Special JS Features/Syntax**

The test case uses the spread operator syntax introduced in ES6, which allows for element duplication from arrays or objects. This feature is widely supported across modern JavaScript engines and browsers.

**Options Compared**

Two options are being compared:

1. **`split()` method**: This is a built-in JavaScript function that splits a string into an array of substrings based on a specified separator.
2. **Spread operator (`[ ...params ]`)**: This syntax allows for element duplication from arrays or objects, creating a new array with the same elements.

**Pros and Cons**

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

* `split()` method:
	+ Pros: Generally faster and more efficient due to its built-in nature.
	+ Cons: May require additional memory allocation for the resulting array.
* Spread operator (`[ ...params ]`):
	+ Pros: Can be more memory-efficient, as it only creates a new array reference without allocating new memory.
	+ Cons: May incur slightly higher overhead due to the syntax and potentially slower execution.

**Other Considerations**

When choosing between these two approaches, consider the following factors:

* Performance-critical code paths where every millisecond counts
* Memory-constrained environments or applications
* Code readability and maintainability; some developers may find the spread operator syntax more concise and readable

**Alternatives**

If you're looking for alternative string manipulation methods, consider the following options:

1. **`Array.prototype.slice()`**: This method creates a shallow copy of an array segment.
2. **`String.prototype.substr()`**: This method returns a portion of a string specified by its start position (inclusive) and length.
3. **Regular expressions** (`RegExp.prototype.exec()`) for more complex string manipulation scenarios.

Keep in mind that these alternatives may have different performance characteristics, trade-offs, or use cases compared to the `split()` method and spread operator syntax.

Related benchmarks:

Random test1 (version: 0)

Comparing performance of: split vs spread

Created: 4 years ago by: Guest

Jump to the latest result

split

spread

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):