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splice(indexof()) vs filter
(version: 0)
Comparing performance of:
filter vs indexOf
Created:
4 years ago
by:
Guest
Go to the latest result
Script Preparation code:
var arr = Array.from({length:10000}, (v,i) => i)
Tests:
filter
arr.filter((item) => { return item !== 5000; });
indexOf
arr.splice(arr.indexOf(5000), 1);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
filter
indexOf
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
one year ago
)
User agent:
Mozilla/5.0 (iPhone; CPU iPhone OS 17_6_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.6 Mobile/15E148 Safari/604.1
Browser/OS:
Mobile Safari 17 on iOS 17.6.1
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=583770" width="100%" height="500px"></iframe>
indexOf
60.9M/s
filter
43K/s
View exact numbers
Test name
Executions per second
✓
indexOf
60,859,680 Ops/sec
filter
43,037 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
**Overview of the Benchmark** The provided benchmark, hosted on MeasureThat.net, compares the performance of two JavaScript approaches: `splice(indexOf())` and `filter()`. The benchmark tests which approach is faster for removing an element from an array. **Options Compared** Two options are being compared: 1. **Splice with `indexOf()`**: This approach uses the `indexOf()` method to find the index of the target element (5000) in the array, and then removes the element at that index using `splice()`. 2. **Filter**: This approach uses the `filter()` method to create a new array containing all elements except the one with value 5000. **Pros and Cons** * **Splice with `indexOf()`**: + Pros: Can be more efficient if the target element is close to the beginning of the array, as it only needs to traverse a small portion of the array. + Cons: Requires two method calls (indexOf() followed by splice()), which can lead to additional overhead and slower performance compared to using `filter()` directly. * **Filter**: + Pros: More concise and expressive, as it eliminates the need for indexing and removes the element in a single step. Also, it does not require an extra method call. + Cons: May be slower than splice() when removing a large portion of the array, since JavaScript has to create a new array containing all elements except the one being removed. **Library and Special Features** In this benchmark, there is no explicit mention of any libraries or special features being used. However, it's worth noting that both `indexOf()` and `filter()` are built-in JavaScript methods, so they don't require any external dependencies. **Other Considerations** When choosing between these two approaches, consider the specific use case and performance requirements: * If you need to frequently remove elements from an array at a specific index, using `splice(indexOf())` might be more efficient. * If you're working with large arrays or need to eliminate multiple elements that don't match a condition, `filter()` is likely a better choice. **Alternatives** Other alternatives for removing an element from an array include: 1. **Array.prototype.map() + concat()**: This approach uses `map()` to create a new array containing the desired elements and then concatenates it with an empty array using `concat()`. However, this method is generally slower than both `splice(indexOf())` and `filter()`. 2. **Using `findIndex()` instead of `indexOf()`**: If you need to find the index of the target element first, consider using `findIndex()`, which returns -1 if no element matches. 3. **Using a different data structure**: Depending on your specific use case, using an array with a pre-allocated size or another data structure like a linked list might be more efficient for removing elements. In summary, this benchmark provides a simple and effective way to compare the performance of two common JavaScript approaches: `splice(indexOf())` and `filter()`. The choice between these approaches depends on the specific use case and performance requirements.
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