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Push vs psread
(version: 0)
Comparing performance of:
push vs spread
Created:
4 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
const list = ['name', 'name2', 'name3']
Tests:
push
const list = ['name', 'name2', 'name3'] list.push('name4')
spread
const list = ['name', 'name2', 'name3'] const temp = [...list, 'name4']
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
push
spread
Fastest:
N/A
Slowest:
N/A
Latest run results:
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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. The benchmark is designed to compare the performance of two approaches: using `push()` and using the spread operator (`...`). **Push()** When using `push()`, an element is appended to the end of an array. In this case, a new element `'name4'` is added to the existing array `list`. This operation involves: 1. Creating a temporary array object. 2. Pushing the new element onto the temporary array. **Spread Operator (...)** The spread operator (`...`) creates a new array by copying elements from an existing array and adding them to a new array. In this case, the spread operator is used to create a new array `temp` that includes all elements from the original array `list` followed by the new element `'name4'`. **Pros and Cons** **Push():** Pros: * Simple and intuitive syntax. * Widely supported across different JavaScript engines. Cons: * Can be slower than the spread operator due to the overhead of creating a temporary array object. **Spread Operator (...):** Pros: * More expressive and concise syntax. * Can lead to more efficient execution since it avoids the creation of a temporary array object. Cons: * Less intuitive syntax for some developers, particularly those without prior experience with JavaScript arrays. * May not be supported by older JavaScript engines or specific implementations. **Other Considerations** * Both approaches have a time complexity of O(1) on average, meaning that the execution time grows linearly with the size of the array. However, the spread operator might be slightly faster due to its optimized implementation in some JavaScript engines. * The benchmark also considers the number of executions per second, which can affect the results. **Library and Special JS Features** In this benchmark, there is no specific library or special JavaScript feature being used beyond the standard JavaScript language features mentioned above. However, it's worth noting that the benchmark may be affected by other factors such as: * Browser-specific optimizations. * JavaScript engine-specific behavior (e.g., different implementation of arrays). * Hardware-specific performance variations. **Alternatives** There are alternative approaches to measuring the performance of array operations in JavaScript, including: 1. **Array.prototype.forEach()**: This method iterates over an array without modifying it, which can be useful for benchmarking purposes. 2. **Array.prototype.map()**: Similar to `forEach()`, but returns a new array instead of modifying the original one. 3. **Native Web Workers**: These allow running JavaScript code in parallel threads, potentially leading to better performance when measuring computationally intensive operations. Keep in mind that each alternative has its own trade-offs and considerations depending on the specific use case or scenario being benchmarked.
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