Benchmark: most tests 2 - MeasureThat.net

Script Preparation code:

var year = '2004 ';

Tests:

split
console.log(year.split(' ')[0]);
substring
console.log(year.substring(0,4))
loop
let substr = "" for (var i = 0; i < 4; i++) { substr += year.charAt(i) } console.log(substr)
charAt
console.log(year.charAt(0) + year.charAt(1) + year.charAt(2) + year.charAt(3))
slice
console.log(year.slice(0, 4));
number
console.log(Number(year));

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
split
substring
loop
charAt
slice
number

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.36 Edg/110.0.1587.50

Browser/OS: Chrome 110 on Windows

View result in a separate tab

Test name	Executions per second
split	223685.7 Ops/sec
substring	237505.1 Ops/sec
loop	221923.3 Ops/sec
charAt	208888.9 Ops/sec
slice	236809.8 Ops/sec
number	220365.7 Ops/sec

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

LLMs can make mistakes. Check important info.

**Overview of the Benchmark**

MeasureThat.net is a website that allows users to create and run JavaScript microbenchmarks. The provided benchmark definition consists of a script preparation code, which initializes a variable `year` with the string '2004 ', and an array of individual test cases.

Each test case contains a single JavaScript statement or expression that operates on the `year` variable. The benchmark aims to measure the execution time of each test case in different browsers and devices.

**Test Cases and Comparison**

The six test cases are:

1. `split`: Extracts the year from the string using the `split()` method.
2. `substring`: Extracts the first four characters of the year using the `substring()` method.
3. `loop`: Iterates over the characters of the year using a loop and concatenates them to form a new string.
4. `charAt`: Extracts the individual characters of the year using the `charAt()` method.
5. `slice`: Extracts the first four characters of the year using the `slice()` method.
6. `number`: Converts the year string to an integer using the `Number()` function.

**Comparison Options**

The benchmark compares different approaches for extracting or manipulating the year string:

1. **`split()`**: Splits the string into an array and returns the first element, which is the year.
2. **`substring()`**: Returns a subset of the original string, starting from index 0 and ending at index 4 (the length of the year string).
3. **Loop**: Iterates over each character of the year string using a loop and concatenates them to form a new string.
4. **charAt()**: Extracts individual characters of the year string by their index.
5. **slice()**: Returns a subset of the original string, starting from index 0 and ending at index 4 (the length of the year string).
6. **Number()**: Converts the year string to an integer.

**Pros and Cons**

* `split()`:
	+ Pros: Simple and efficient.
	+ Cons: May not work as expected if the input string has multiple spaces or other formatting issues.
* `substring()`: 
	+ Pros: Directly extracts the desired substring, which can be faster than other approaches.
	+ Cons: Assumes a fixed length for the year string (4 characters), which may not always be the case.
* Loop:
	+ Pros: Generic and works with any input string, regardless of its format or length.
	+ Cons: May be slower due to the loop overhead.
* `charAt()`: 
	+ Pros: Works with any index and can handle non-integer indices.
	+ Cons: Requires manual indexing, which can lead to errors if not implemented correctly.
* `slice()`: 
	+ Pros: Similar to `substring()` but returns a typed array for better performance.
	+ Cons: May have compatibility issues with older browsers or environments.
* `Number()`: 
	+ Pros: Converts the string to an integer, which can be useful in certain scenarios.
	+ Cons: May lose precision if the input string is not a valid integer.

**Other Considerations**

The benchmark also takes into account the browser and device platform used for execution, as well as the operating system. These factors can significantly impact performance due to differences in JavaScript engine optimizations, memory management, and hardware capabilities.

**Alternatives**

Some alternative approaches or libraries that could be used for similar tasks include:

* Using regular expressions (regex) to extract the year from the input string.
* Utilizing a library like `moment.js` for date manipulation and formatting.
* Implementing a custom solution using a template engine like Handlebars.

However, these alternatives may not provide identical results or performance characteristics as the original benchmark.

Related benchmarks:

most tests 2 (version: 0)

Comparing performance of: split vs substring vs loop vs charAt vs slice vs number

Created: one year ago by: Guest

Jump to the latest result

split

substring

loop

charAt

slice

number

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):