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Insert new Item on specific Index v2
(version: 0)
Comparing performance of:
Native Methods vs Custom Loop vs Other Custom Loop
Created:
3 years ago
by:
Guest
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Tests:
Native Methods
// Params: var arr = [1, 2, 3, 4]; const index = 3; const newItem = 5; // Steps: // 1. Create new array from the original one at given index let start = arr.slice(0, index); // 2. Add new item to the copy start.push(newItem); // 3. Get the rest of the original array let end = arr.slice(index); // 4. Save result arr = start.concat(end) // 5. Print the merged array console.log(arr);
Custom Loop
// Params: var arr = [1, 2, 3, 4]; const index = 3; const newItem = 5; var temp; var newArr = [...arr]; for(var i = index; i < arr.length; i++){ if(temp === undefined){ temp = newArr[i]; }else{ var t = newArr[i]; newArr[i] = temp; temp = t; } } newArr[arr.length] = temp; newArr[index] = newItem; arr = [...newArr]; console.log(arr);
Other Custom Loop
// Params: var arr = [1, 2, 3, 4]; const index = 3; const newItem = 5; // Steps: // 1. Create new array from the original one at given index let copy = []; for (let i = 0; i < index; i++) { copy[copy.length] = arr[i]; } // 2. Add new item to the copy copy[index] = newItem; // 3. Get the rest of the original array let rest = []; for (let i = index; i < arr.length; i++) { copy[copy.length] = arr[i]; } // 5. Save new arr arr = [...copy]; // 6. Print the merged array console.log(arr);
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Suite status:
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Test case name
Result
Native Methods
Custom Loop
Other Custom Loop
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'd be happy to explain what's being tested in the provided benchmark. **Benchmark Definition** The benchmark is designed to measure the performance of different approaches for inserting a new item at a specific index in an array. The test creates a copy of the original array, adds the new item, and then merges the two arrays together. There are three different approaches being compared: 1. **Native Methods**: This approach uses built-in JavaScript methods like `slice()` and `concat()`. It's likely that this is the most efficient approach, as it leverages the optimizations made by the browser's JavaScript engine. 2. **Custom Loop**: This approach uses a loop to create a copy of the original array up to the specified index, adds the new item, and then appends the rest of the original array to the copy. 3. **Other Custom Loop**: This approach is similar to the previous one but with some minor differences in the implementation. **Pros and Cons** * **Native Methods**: + Pros: Fastest execution time due to optimized browser engine. + Cons: May not be as intuitive or easy to understand for developers who are not familiar with the underlying implementation. * **Custom Loop**: + Pros: Can be easier to understand and implement, especially for developers who are comfortable with manual array manipulation. + Cons: Likely slower than native methods due to the overhead of loop iterations. * **Other Custom Loop**: + Pros: May offer a trade-off between execution time and readability. + Cons: The exact performance characteristics are unclear without benchmarking. **Library Usage** None of the test cases explicitly use any external libraries. However, it's worth noting that some browsers may optimize or implement array methods differently due to their own optimizations or features like `Array.prototype.find()` or `Array.prototype.findIndex()`. **Special JavaScript Features/Syntax** The tests do not explicitly utilize any special JavaScript features or syntax beyond standard JavaScript language features. However, the use of `let` and `const` keywords in some cases may be seen as a feature of modern JavaScript. **Alternatives** If you were to modify this benchmark to test alternative approaches, some potential alternatives could include: * Using `Array.prototype.forEach()` instead of loops. * Utilizing browser-specific features like WebAssembly or SIMD instructions for array operations. * Implementing a hybrid approach that combines elements of native methods and custom loop techniques. Keep in mind that these alternatives would require significant changes to the benchmark's implementation and test cases, which could impact the accuracy and relevance of the results.
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