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Remove from array
(version: 0)
Remove from array
Comparing performance of:
Default vs Reverse vs Fix
Created:
9 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
var letters = ["A", "B", "C", "D", "E", "F"];
Tests:
Default
var copy = letters.slice(); var length = copy.length; for (var i = 0; i < length; i++) { if (copy[i] === "B" || copy[i] === "C") { letters.splice(letters.indexOf(copy[i]), 1); } }
Reverse
var copy = letters.slice(); var length = copy.length; for (var i = length - 1; i >= 0; i--) { if (copy[i] === "B" || copy[i] === "C") { letters.splice(i, 1); } }
Fix
var length = letters.length; for (var i = 0; i < length; i++) { if (letters[i] === "B" || letters[i] === "C") { letters.splice(i, 1); } }
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
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Test case name
Result
Default
Reverse
Fix
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
**Benchmark Explanation** The provided JSON represents a JavaScript microbenchmark, specifically designed to measure the performance of removing elements from an array in different ways. The benchmark consists of three test cases: 1. **Default**: This is the most commonly used approach to remove elements from an array. The code iterates through the array using a for loop and uses the `splice()` method with the `indexOf()` method to find and remove the elements. 2. **Reverse**: In this test case, the iteration order is reversed compared to the Default test. Instead of starting from the first element, it starts from the last element and iterates backwards. This approach can be beneficial when the array is large and the removals are performed at the end. 3. **Fix**: This test case uses a different approach that avoids iterating through the entire array while removing elements. It calculates the length of the original array, then iterates through the modified array to remove elements. **Options Compared** The benchmark compares three different approaches: * **Default**: Iterating through the array in order and using `splice()` with `indexOf()` * **Reverse**: Iterating through the array in reverse order and using `splice()` with `indexOf()` * **Fix**: Calculating the length of the original array, iterating through the modified array, and removing elements **Pros and Cons** * **Default**: + Pros: Simple to implement, widely supported + Cons: May be slower for large arrays due to repeated calls to `indexOf()` and `splice()` * **Reverse**: + Pros: Can be faster for large arrays due to reduced iteration overhead + Cons: Requires careful consideration of the array's size and structure to avoid edge cases * **Fix**: + Pros: Avoids unnecessary iterations through the entire array, reducing performance overhead + Cons: May require more complex code and calculations **Library Used** There is no specific JavaScript library used in this benchmark. However, some browsers like Opera 41 use a proprietary rendering engine (Blink) that may have its own optimizations for array manipulation. **Special JS Features/Syntax** None mentioned in the provided JSON. The benchmark focuses on the differences between three basic approaches to removing elements from an array. **Alternative Approaches** Other ways to remove elements from an array include: * Using `filter()` instead of `splice()` * Using a regular expression with `replace()` or `replaceAll()` * Utilizing modern JavaScript features like `Array.prototype.map()` and `reduce()` for more efficient data processing Keep in mind that the choice of approach depends on the specific use case, array size, and performance requirements.
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