Benchmark: Palendrome - MeasureThat.net

Tests:

Reverse array comparison (short)
const strings = ['pop', 'noon', 'madam', 'james'] const checkPalendrome = string => { string === [...string].reverse().join('') } for (const string of strings) { console.log(`${string} palendrome = ${checkPalendrome(string)}`) }
For loop early exit (short)
const strings = ['pop', 'noon', 'madam', 'james'] const checkPalendrome = string => { const length = string.length let isPalendrome = true for (let index = 0; index <= length; index++) { const left = string.charAt(index) const right = string.charAt(length - index - 1) isPalendrome = left === right if (!isPalendrome) break } return isPalendrome } for (const string of strings) { console.log(`${string} palendrome = ${checkPalendrome(string)}`) }
Reverse array comparison (long)
const strings = ['tattarrattat', 'pneumonoultramicroscopicsilicovolcanoconiosis'] const checkPalendrome = string => { string === [...string].reverse().join('') } for (const string of strings) { console.log(`${string} palendrome = ${checkPalendrome(string)}`) }
For loop early exit (long)
const strings = ['tattarrattat', 'pneumonoultramicroscopicsilicovolcanoconiosis'] const checkPalendrome = string => { const length = string.length let isPalendrome = true for (let index = 0; index <= length; index++) { const left = string.charAt(index) const right = string.charAt(length - index - 1) isPalendrome = left === right if (!isPalendrome) break } return isPalendrome } for (const string of strings) { console.log(`${string} palendrome = ${checkPalendrome(string)}`) }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Reverse array comparison (short)
For loop early exit (short)
Reverse array comparison (long)
For loop early exit (long)

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:109.0) Gecko/20100101 Firefox/112.0

Browser/OS: Firefox 112 on Mac OS X 10.15

View result in a separate tab

Test name	Executions per second
Reverse array comparison (short)	40778.7 Ops/sec
For loop early exit (short)	46120.6 Ops/sec
Reverse array comparison (long)	73759.3 Ops/sec
For loop early exit (long)	89301.5 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 benchmark analysis.

**Benchmark Overview**

The benchmark tests the performance of two approaches to check if a string is a palindrome: using reverse array and using for loop with early exit. The tests are run on different inputs, ranging from short strings like "pop" and "noon" to longer strings like "tattarrattat" and "pneumonoultramicroscopicsilicovolcanoconiosis".

**Approach 1: Reverse Array**

This approach uses the spread operator (`...`) to convert the string into an array, reverses it using `Array.prototype.reverse()`, and then joins it back into a string using `join('')`. The resulting string is compared with the original string.

Pros:

* Simple and concise implementation
* Works well for most inputs

Cons:

* May not be optimized for large strings due to the overhead of creating an array and reversing it

**Approach 2: For Loop with Early Exit**

This approach uses a traditional for loop to iterate over the characters in the string, checking if each character is equal to its corresponding character from the end of the string. If any pair doesn't match, the function returns false.

Pros:

* May be optimized for large strings due to the use of early exit
* Can handle edge cases like empty or single-character strings

Cons:

* More verbose implementation compared to the reverse array approach
* May have overhead from the loop and conditional checks

**Library Used**

None explicitly mentioned in the benchmark definition. However, it's worth noting that `Array.prototype.reverse()` is a built-in method, which is part of the ECMAScript standard.

**Special JS Feature/Syntax**

The `...` spread operator and template literals (`${string} palendrome = ${checkPalendrome(string)}`) are used in the benchmark definition. These are relatively modern JavaScript features that were introduced in ECMAScript 2015 (ES6).

Other Alternatives

If you're looking for alternative approaches to check if a string is a palindrome, here are a few options:

1. **Regex**: You can use regular expressions to check if a string is a palindrome. This approach would involve creating a regex pattern that matches the input string and its reverse.
2. **Math library functions**: Some libraries like Math.js provide additional mathematical functions that can be used to check if a string is a palindrome, such as `String.prototype.lastIndexOf()` or `String.prototype.indexOf()`.
3. **External libraries**: There are also external libraries available that specialize in string manipulation and palindrome detection, such as Palindrome.js.

In summary, the benchmark highlights the performance trade-offs between using reverse arrays versus traditional for loops with early exit when checking if a string is a palindrome.

Related benchmarks:

Palendrome (version: 0)

Comparing performance of: Reverse array comparison (short) vs For loop early exit (short) vs Reverse array comparison (long) vs For loop early exit (long)

Created: one year ago by: Guest

Jump to the latest result

Reverse array comparison (short)

For loop early exit (short)

Reverse array comparison (long)

For loop early exit (long)

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):