Benchmark: while vs padend - MeasureThat.net

Script Preparation code:

var prevPos = "fayouwy078uVOUYGO&YG";
var nextPos = "fayouwy078uVOUYGO&YG423jlbn";

Tests:

while
while (prevPos.length != nextPos.length) { if (prevPos.length > nextPos.length) { nextPos += "0"; } else { prevPos += "0"; } }
padEnd
if(prevPos.length !== nextPos.length) { if (prevPos.length > nextPos.length) { nextPos = nextPos.padEnd(prevPos.length, '0'); } else { prevPos = prevPos.padEnd(nextPos.length, '0'); } }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
while
padEnd

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

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

LLMs can make mistakes. Check important info.

I'll break down the provided benchmark and explain what's being tested, compared, and the pros and cons of each approach.

**Benchmark Overview**

The benchmark compares two approaches to achieve the same result: using a `while` loop versus the `padEnd()` method. The script is designed to incrementally add zeros to strings until they reach the same length.

**Script Preparation Code**

The script preparation code contains two variables:

* `prevPos`: an initial string with some characters ( likely a placeholder or a specific value)
* `nextPos`: another initial string with more characters (also likely a placeholder)

These variables are used as input for both test cases.

**Html Preparation Code**

There is no HTML preparation code provided, which means the benchmark only tests the JavaScript implementation itself.

**Benchmark Test Cases**

There are two test cases:

1. **while**: This test case uses a `while` loop to incrementally add zeros to `prevPos` until it reaches the same length as `nextPos`.
2. **padEnd**: This test case uses the `padEnd()` method to achieve the same result as the `while` loop.

**Comparison**

The benchmark compares the performance of these two approaches:

* `while`: a more traditional, imperative approach using a loop
* `padEnd`: a more functional, declarative approach using a built-in string method

**Pros and Cons**

**While Loop (padEnd alternative)**

Pros:

* More explicit control over the increment process
* Can be easier to understand for developers familiar with loops
* Can be adapted to other similar problems

Cons:

* May be slower due to the loop overhead
* Requires manual string manipulation (concatenation)

**padEnd Method**

Pros:

* Faster, as it's a built-in method optimized for performance
* More concise and expressive code
* Reduces manual string manipulation overhead

Cons:

* Less explicit control over the increment process
* May require more understanding of string padding and alignment
* Not all browsers may support this method (although it's widely supported)

**Library: `padEnd`**

The `padEnd()` method is a built-in JavaScript method that pads a string with an optional pad character to make its length equal to the specified maximum number of characters. This method is implemented in WebKit and Firefox, but not in Edge or Internet Explorer.

**Special JS Feature/Syntax**

There are no special JS features or syntax used in this benchmark, other than the use of `padEnd()`, which is a built-in method.

**Alternatives**

Other alternatives for string padding or alignment include:

* `padStart()` (introduced in ECMAScript 2017)
* Using string concatenation with a loop
* Using regular expressions

However, these alternatives may not be as efficient or concise as the `padEnd()` method.

I hope this explanation helps software engineers understand the benchmark and its results!

Related benchmarks:

while vs padend (version: 0)

Comparing performance of: while vs padEnd

Created: 3 years ago by: Guest

Jump to the latest result

while

padEnd

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

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