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shift 4 filter
(version: 0)
Comparing performance of:
filter vs shift
Created:
2 years ago
by:
Guest
Go to the latest result
Script Preparation code:
var number = +prompt('Enter array length') var arr = new Array(number).fill(10);
Tests:
filter
console.log(arr) arr.filter((_, i) => i )
shift
arr.shift()
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
filter
shift
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
2 years ago
)
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36
Browser/OS:
Chrome 123 on Mac OS X 10.15.7
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<iframe src="https://measurethat.net/Embed?id=519528" width="100%" height="500px"></iframe>
shift
21.6M/s
filter
771/s
View exact numbers
Test name
Executions per second
✓
shift
21,579,154 Ops/sec
filter
771 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the benchmark and explain what's being tested. **Benchmark Overview** The test suite, also known as the benchmark, is designed to measure the performance of two specific JavaScript operations: filtering an array using the `filter()` method and shifting elements from the beginning of an array. **Test Cases** There are two individual test cases: 1. **Filter Test Case** * Benchmark Definition: `arr.filter((_, i) => i)` * Purpose: Measure the time it takes to filter a sorted array by only considering the index (`i`) as the filtering condition. 2. **Shift Test Case** * Benchmark Definition: `arr.shift()` * Purpose: Measure the time it takes to remove and return the first element from an array. **Options Compared** In this benchmark, two options are being compared: 1. **Filtering using `filter()`**: This is the most common approach for filtering arrays in JavaScript. 2. **Shifting elements**: This method involves removing and returning the first element of the array without reassigning it to a new array. **Pros and Cons** **Filtering using `filter()`** Pros: * Fast and efficient, especially when dealing with large arrays * Allows for arbitrary filtering conditions * Easy to implement Cons: * Creates a new array and assigns it to a variable, which can be memory-intensive * May not be suitable for use cases where the original array needs to remain unchanged **Shifting elements** Pros: * Does not create a new array or modify the original array * Can be more memory-efficient than filtering using `filter()` Cons: * Only works when shifting from the beginning of an array * Can lead to performance issues if used incorrectly (e.g., shifting while iterating over the array) **Library Used** In this benchmark, no specific library is being used. The `filter()` and `shift()` methods are part of the JavaScript standard library. **Special JS Feature or Syntax** There doesn't seem to be any special features or syntax being tested in this benchmark. **Other Alternatives** If you're looking for alternative approaches to filtering or shifting arrays, here are a few options: * For filtering: You can use `Array.prototype.map()` and `Array.prototype.filter()` together to achieve the same result without creating a new array. * For shifting elements: You can use `Array.prototype.pop()` instead of `shift()`, but this method returns the removed element, not the original value. For more advanced filtering techniques, you might consider using libraries like Lodash or Ramda.
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