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javascript push vs spred
(version: 0)
javascript push vs spred
Comparing performance of:
push vs spread
Created:
4 years ago
by:
Guest
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Tests:
push
const options = []; options.push({ text: "conference.ask_host_for_help", value: "askHostForHelp" }); options.push({ text: "conference.message_to_host", value: "setMessageTargetHost" });
spread
let options = []; options = [...options, { text: "conference.ask_host_for_help", value: "askHostForHelp" }]; options = [...options, { text: "conference.message_to_host", value: "setMessageTargetHost" }];
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
push
spread
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided benchmark definition and test cases. **Benchmark Definition** The benchmark definition is a JSON object that represents the microbenchmark to be executed. In this case, it's a simple JavaScript function that creates an array of objects using two different methods: `push` and `spread`. The script preparation code and HTML preparation code are empty, which means that the test only focuses on the JavaScript implementation. **Options Compared** The benchmark compares the performance of two options: 1. Using the `push` method to add elements to an array. 2. Using the spread operator (`...`) to create a new array with elements added to it. **Pros and Cons of Each Approach** **Push Method:** Pros: * More efficient for large arrays, as it only requires a single pointer update. * Can be more cache-friendly, as it allows for sequential memory access. Cons: * May require more operations to add elements, such as `length++` updates. * Can lead to slower performance in browsers with poor array allocation heuristics. **Spread Operator:** Pros: * More intuitive and readable, especially for developers familiar with other languages. * Can be faster for small arrays or when used with functions like `Array.prototype.push()`. * Eliminates the need for explicit `length++` updates. Cons: * May lead to slower performance in browsers that have poor array allocation heuristics. * Requires more memory allocations, which can impact performance. **Other Considerations** The benchmark doesn't account for other factors that might affect performance, such as: * Array size and density * Browser-specific optimizations or limitations * GC frequency and pause times It's also worth noting that the spread operator is a relatively new feature in JavaScript, introduced in ECMAScript 2015. Its implementation may vary between browsers. **Libraries Used** None are explicitly mentioned in the benchmark definition, but it's likely that some browser-specific optimizations or libraries might be used under the hood. **Special JS Features/Syntax** The spread operator (`...`) is a relatively new feature introduced in ECMAScript 2015. While it's widely supported by modern browsers, older versions may not support it. In summary, the benchmark compares the performance of two array manipulation methods: `push` and spread operator. The push method is generally faster for large arrays but requires more operations to add elements. The spread operator is more intuitive and readable but may lead to slower performance in some browsers.
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