const params = 'random str';
const other = params.split('');
const params = 'random str';
const other = [ params ];
--enable-precise-memory-info
flag.
Test case name | Result |
---|---|
split | |
spread |
Test name | Executions per second |
---|---|
split | 9329225.0 Ops/sec |
spread | 13434784.0 Ops/sec |
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:
split()
method: This is a built-in JavaScript function that splits a string into an array of substrings based on a specified separator.[ ...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:[ ...params ]
):Other Considerations
When choosing between these two approaches, consider the following factors:
Alternatives
If you're looking for alternative string manipulation methods, consider the following options:
Array.prototype.slice()
: This method creates a shallow copy of an array segment.String.prototype.substr()
: This method returns a portion of a string specified by its start position (inclusive) and length.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.