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push spread irek
(version: 0)
Comparing performance of:
push vs spread operator
Created:
6 years ago
by:
Guest
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Tests:
push
let arr = []; const maxWidthPixels = 20; const maxHeightPixels = 20; for (let i = 0; i <= maxHeightPixels; i++) { for (let j = 0; j <= maxWidthPixels; j++) { const hex = `${i}${j}`; arr.push(hex); } }
spread operator
let arr = []; const maxWidthPixels = 20; const maxHeightPixels = 20; for (let i = 0; i <= maxHeightPixels; i++) { for (let j = 0; j <= maxWidthPixels; j++) { const hex = `${i}${j}`; arr = [...arr, hex] } }
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Suite status:
<idle, ready to run>
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Test case name
Result
push
spread operator
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N/A
Slowest:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's dive into the explanation of the provided benchmark. **What is tested?** The test measures the performance difference between two approaches: using the traditional `push` method and the spread operator (`...`) to add elements to an array in JavaScript. **Options compared** Two options are being compared: 1. **Traditional `push` method**: The code uses a `for` loop to iterate over the range of values for both `i` and `j`, constructs a hexadecimal string using template literals, and then pushes it onto the array using the `push` method. 2. **Spread operator (`...`)**: The same code is used, but instead of pushing the value onto the end of the array, it uses the spread operator to create a new array with the added value. **Pros and Cons** **Traditional `push` method:** Pros: * Widely supported in older browsers * Familiar syntax for many developers Cons: * Can be slower due to the overhead of iterating over the range of values * May not perform well for large arrays **Spread operator (`...`)** Pros: * Efficient and concise syntax * Creates a new array with the added value, avoiding mutation Cons: * May not work in older browsers that don't support the spread operator * Can be less readable due to its concise nature **Other considerations** * The test case uses no libraries or external dependencies. * There are no special JavaScript features or syntax mentioned. **Alternatives** If you were to write a similar benchmark, you might consider adding additional tests for other array methods, such as: * `unshift` * `concat` * `splice` * Using `Array.prototype.map()` and `Array.prototype.forEach()` You could also explore testing different data types, such as objects or sets, to see how performance differs. In terms of modifying the test case itself, you might consider adding more variations to the input range or data type to increase the difficulty of the benchmark. Alternatively, you could experiment with different JavaScript engines or environments to compare their performance characteristics.
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