Benchmark: some() vs every()

Script Preparation code:

function isPangramWithSome(string){
  return ! [... "abcdefghijklmnopqrstuvwxyz"]
    .some((c) => ![... string.toLowerCase()].includes(c));
}

function isPangramWithEvery(string){
  return 'abcdefghijklmnopqrstuvwxyz'
    .split('')
    .every((x) => string.toLowerCase().includes(x));
}

Tests:

.some()
// isPangramWithSome("A pangram is a sentence that contains every single letter of the alphabet at least once.") isPangramWithSome("Pack my box with five dozen liquor jugs.")
.every()
// isPangramWithEvery("A pangram is a sentence that contains every single letter of the alphabet at least once.") isPangramWithEvery("Pack my box with five dozen liquor jugs.")

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
.some()
.every()

Fastest: N/A

Slowest: N/A

Latest 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 for you.

**Benchmark Overview**

The provided JSON represents a JavaScript microbenchmarking test case, where two different approaches are compared: `.some()` and `.every()`. The benchmark aims to measure which approach is faster for checking if a string is a pangram (i.e., contains all the letters of the alphabet at least once).

**Approaches Compared**

There are two approaches being compared:

1. **.some()**: This method returns `true` if at least one element of the array passes the test implemented by its callback function.
2. **.every()**: This method returns `true` if all elements of the array pass the test implemented by its callback function.

**Pros and Cons**

Here are some pros and cons for each approach:

* **.some():**
	+ Pros:
		- More efficient, as it stops iterating as soon as a match is found.
		- Can be faster in practice, especially for large strings.
	+ Cons:
		- May not always return the correct result if the string contains multiple occurrences of each letter (in this case, the test actually returns `true` even if there are duplicate letters).
* **.every():**
	+ Pros:
		- Always returns the correct result, as it checks every single character.
	+ Cons:
		- May be slower than `.some()` for large strings, due to its exhaustive nature.

**Library Usage**

There is no explicit library usage in this benchmark, but it's worth noting that both `.some()` and `.every()` methods rely on the Array prototype and the `includes()` method, which are part of the standard JavaScript API.

**Special JS Features/Syntax**

None of the provided code uses any special JavaScript features or syntax.

**Other Alternatives**

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

1. **Regular expressions**: You can use regular expressions with the `test()` method to match all the letters of the alphabet in a specific order.
2. **String manipulation**: You can manually iterate over each character of the alphabet and check if it exists in the input string using array methods like `.includes()`.
3. **Third-party libraries**: There are libraries like Pangram.js or StringPangram that provide optimized implementations for checking pangrams.

Keep in mind that these alternatives might have different performance characteristics and trade-offs compared to the original `.some()` and `.every()` approaches.

Related benchmarks:

some() vs every() (version: 0)

Comparing performance of: .some() vs .every()

Created: 3 years ago by: Guest

Jump to the latest result

.some()

.every()

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):