Benchmark: for vs some - MeasureThat.net

Script Preparation code:

var pathBase = "/app";
var excludes = ["static", "pwa", "fonts", "manifest.json"];
var testuri = '/app/fonts';

Tests:

some
if(excludes.some(excl => testuri.startsWith(`${pathBase}/${excl}`))) { return; }
for
for(const exclude of excludes){ const excludePath = pathBase + "/" + exclude; if(testuri.startsWith(excludePath)){ return; } }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
some
for

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.

**Overview of the Benchmark**

The benchmark being measured on MeasureThat.net is a comparison between two approaches to check if a given string (`testuri`) starts with another string (`excludePath`). The two approaches are:

1. Using the `some()` method, which returns `true` as soon as it finds an element in the array that satisfies the condition.
2. Using a traditional `for` loop to iterate over the array of exclusions.

**Approach 1: Using `some()`**

The `some()` method is used with a callback function that takes an element of the array (`excl`) and checks if `testuri` starts with `${pathBase}/${excl}`. The `some()` method returns `true` as soon as it finds an exclusion that matches.

Pros:

* Concise and expressive code.
* Can be faster than traditional loops for small arrays.

Cons:

* May have performance issues for large arrays or complex conditions, due to the overhead of function calls and loop iterations.
* May not be as intuitive for developers who are not familiar with functional programming concepts.

**Approach 2: Traditional `for` Loop**

The code uses a traditional `for` loop to iterate over the array of exclusions. For each exclusion, it checks if `testuri` starts with `${pathBase}/${excl}` and returns immediately if a match is found.

Pros:

* Easy to understand and maintain for developers who are familiar with traditional loops.
* May have better performance than `some()` for large arrays or complex conditions.

Cons:

* Can be more verbose than the `some()` approach, especially for longer loops.
* May require more memory allocation and loop iterations, potentially affecting performance.

**Other Considerations**

* The code uses a `pathBase` variable to construct the full path for each exclusion. This may introduce additional overhead or complexity, depending on the specific use case.
* The code uses template literals (`${...}`) to insert variables into strings. This is a modern JavaScript feature that can make code more concise and readable, but may not be supported by older browsers.

**Library**

There is no explicit library mentioned in the benchmark, but the `some()` method is a built-in function of the JavaScript language.

**Special JS Feature**

The benchmark uses template literals (`${...}`) to insert variables into strings. This is a modern JavaScript feature called "template literals" that was introduced in ECMAScript 2015 (ES6). Template literals allow developers to write more readable and expressive code by inserting variables or expressions directly into strings.

**Alternatives**

If you need to compare the performance of different string matching approaches, here are some alternative benchmarks you could consider:

* Using regular expressions instead of `some()` or traditional loops.
* Comparing the performance of other loop constructs, such as `forEach()`, `map()`, or `filter()`.
* Benchmarking the performance of different string comparison algorithms, such as Boyer-Moore or Knuth-Morris-Pratt.

Keep in mind that the choice of approach and algorithm will depend on the specific requirements and constraints of your use case.

Related benchmarks:

for vs some (version: 0)

Comparing performance of: some vs for

Created: 5 years ago by: Guest

Jump to the latest result

some

for

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):