Benchmark: string.split(" ") once / twice benchmark

Script Preparation code:

var string = 'I\'ve had to optimize a lot of string munging while working on MXHR and in my experience, plain String methods are significantly faster than RegExps in current browsers. Use RegExps on the shortest Strings possible and do everything you possibly can with String methods.'

Tests:

string.split(" ")
var a = string.split(" ") console.log(a) console.log(a)
string.split(" ") x2
console.log(string.split(" ")) console.log(string.split(" "))

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
string.split(" ")
string.split(" ") x2

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 5 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:126.0) Gecko/20100101 Firefox/126.0

Browser/OS: Firefox 126 on Mac OS X 10.15

View result in a separate tab

Test name	Executions per second
string.split(" ")	150886.2 Ops/sec
string.split(" ") x2	127154.3 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks on MeasureThat.net.

**Benchmark Overview**

The benchmark measures the performance difference between two approaches when splitting a string using the `split` method with a space (`" "`) as the separator. There are two test cases:

1. **Single Call**: The first test case calls `string.split(" ")` once and logs the result.
2. **Double Call**: The second test case calls `string.split(" ")` twice, logging each result.

**Options Compared**

The benchmark compares two approaches:

1. **Plain String Methods**: Using native string methods, such as `split`, to split the string.
2. **RegExps (Regular Expressions)**: Using regular expressions (`RegExp`) to split the string.

**Pros and Cons of Each Approach**

**Plain String Methods**

Pros:

* Generally faster than RegExps for simple splitting tasks
* More predictable performance, as native methods are optimized by the browser engine

Cons:

* May not work correctly with non-space separators or edge cases
* Can be slower if the input string is very large

**RegExps (Regular Expressions)**

Pros:

* More flexible than plain string methods for complex splitting tasks
* Can handle non-space separators and edge cases out of the box

Cons:

* Generally slower than plain string methods for simple splitting tasks
* Can be computationally expensive due to the complexity of regular expression matching

**Library Used: None**

There is no specific library used in this benchmark, only native JavaScript methods.

**Special JS Feature or Syntax: None**

This benchmark does not use any special JavaScript features or syntax beyond standard `split`, `console.log`, and string literals.

**Other Alternatives**

If you're looking for alternative approaches to splitting strings, consider:

* Using a library like `lodash` which provides an `unescape` method that can be used to split strings
* Using a third-party library like `regex-split` or `split-string`
* Implementing a custom splitting function using JavaScript's array methods (e.g., `map`, `forEach`)

Related benchmarks:

string.split(" ") once / twice benchmark (version: 0)

Comparing performance of: string.split(" ") vs string.split(" ") x2

Created: 5 months ago by: Guest

Jump to the latest result

string.split(" ")

string.split(" ") x2

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):