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Arabchuk-test1
(version: 0)
Comparing performance of:
funcDeclaration vs anonFunc
Created:
3 years ago
by:
Guest
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Tests:
funcDeclaration
let i = 0 const consoleSomthing = () => {i++}; const doTest = () => ({ test: consoleSomthing() }); for(let i = 0; i < 10000; i++) {doTest();}
anonFunc
let i = 0; const doTest = () => ({ test: (() => {i++})() }); for(let i = 0; i < 10000; i++) {doTest();}
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
funcDeclaration
anonFunc
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
**Benchmark Overview** MeasureThat.net is a website that allows users to create and run JavaScript microbenchmarks. The benchmarking process involves comparing different approaches to measure the performance of various JavaScript features, libraries, and syntax. **Script Preparation Code vs. Html Preparation Code** The script preparation code refers to the JavaScript code that sets up the test environment, including variable declarations, function definitions, and other necessary setup. On the other hand, the HTML preparation code is not provided in this benchmark definition, but it typically includes setting up the HTML structure, CSS styles, and any other external dependencies. In this case, since the HTML preparation code is not available, we'll focus on the script preparation code. The script preparation code defines two test cases: **Test Cases** 1. **funcDeclaration**: This test case uses a function declaration (i.e., `let i = 0; const consoleSomthing = () => {i++};`) to increment a variable `i` inside an immediately invoked function expression (IIFE). 2. **anonFunc**: This test case uses an anonymous function (i.e., `( () => {i++})()` ) to increment the same variable `i`. **Library: console** The `consoleSomthing` function in both test cases uses the `console` object, which is a built-in JavaScript library that provides functions for logging and debugging output. The purpose of this library is to provide a standardized way of interacting with the environment. **JavaScript Feature: Immediately Invoked Function Expressions (IIFE)** The IIFE used in both test cases is a feature introduced in ECMAScript 5. It allows executing a function immediately after its definition, without the need for a separate `function` keyword. In the `funcDeclaration` test case, the IIFE is invoked using the `()` operator to call the function. In the `anonFunc` test case, the IIFE is used as an expression, and its result is stored in the `test` property of the returned object. **Pros and Cons** **Script Preparation Code:** * Pros: + Allows for more control over the test environment. + Enables specific setup or initialization of variables. * Cons: + Can make the code harder to read and maintain. + May introduce unnecessary complexity. **Html Preparation Code:** * Pros: + Provides a clean and simple way to set up the HTML structure. + Eliminates the need for manual DOM manipulation. * Cons: + Limited control over the test environment. + May not be suitable for complex or dynamic tests. **Other Considerations** * **Function declaration vs. anonymous function**: Using an anonymous function can simplify code and reduce overhead, but it may also make debugging more challenging. * **IIFE usage**: While IIFEs are convenient, they can lead to performance overhead due to the creation of a new scope and environment. **Alternatives** Other alternatives for benchmarking JavaScript features include: 1. **V8 Benchmark Suite**: A collection of benchmarks developed by Google's V8 engine team to measure the performance of various JavaScript features. 2. **JSHintr**: A web-based tool that provides a set of benchmarking tests for JavaScript code quality and performance. 3. **JSPerf**: An online testing platform that allows users to compare the performance of different JavaScript implementations. Keep in mind that each benchmarking tool has its strengths and weaknesses, and the choice of which one to use depends on specific requirements and use cases.
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