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object forEach vs _.each vs js for3
(version: 0)
Compare the new ES6 spread operator with the traditional concat() method
Comparing performance of:
lodash each vs for vs for 2
Created:
6 years ago
by:
Guest
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HTML Preparation code:
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.9.1/underscore-min.js"></script>
Tests:
lodash each
var params = {"hello":"hello", "true": true, "int": 7 }; var index = 0; _.each(params, param => index++);
for
var params = {"hello":"hello", "true": true, "int": 7 }; var index = 0; for(var i in params){ index++; }
for 2
var params = {"hello":"hello", "true": true, "int": 7 }; var index = 0; var i; for(i in params){ index++; }
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
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Test case name
Result
lodash each
for
for 2
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
**Overview** The provided benchmark, hosted on MeasureThat.net, compares the performance of three different approaches to iterate over an object: `_.each` (Lodash), traditional `for` loop, and a newer ES6-inspired approach using the spread operator (`...`). This comparison aims to assess the performance benefits or drawbacks of each method. **Options Compared** 1. **_.each (Lodash)**: A functional programming style function from the Lodash library that iterates over an object. 2. **Traditional `for` loop**: A common iteration pattern in JavaScript using a traditional loop with `var i in params`. 3. **Spread Operator (`...`)**: A newer ES6-inspired approach to iterate over an object, introduced in ECMAScript 2018. **Pros and Cons of Each Approach** 1. **_.each (Lodash)**: * Pros: Concise, readable code; no manual indexing issues. * Cons: Additional dependency on the Lodash library, potentially slower due to function call overhead. 2. **Traditional `for` loop**: * Pros: No additional dependencies; well-known and widely supported. * Cons: Manual indexing can lead to errors or off-by-one issues; code can be less readable. 3. **Spread Operator (`...`)**: * Pros: Modern, concise syntax; no manual indexing required. * Cons: Introduced in a relatively recent standard (ES 2018), might not be supported by older browsers. **Library and Syntax** The `_.each` function is part of the Lodash library, which provides numerous utility functions for JavaScript developers. The spread operator (`...`) was introduced in ECMAScript 2015 (ES6) as a new syntax to expand an array or object into individual elements. **Special JS Feature/Syntax** There are no special JavaScript features or syntaxes mentioned in the provided benchmark. **Other Alternatives** If you need alternative iteration methods, consider: 1. **`forEach()`**: A modern, concise method for iterating over arrays and objects introduced in ECMAScript 2009 (ES5). 2. **`reduce()`** and **`map()`**: Other utility functions from the Array prototype that can be used for iterative operations. In conclusion, this benchmark allows users to compare the performance of different iteration methods in JavaScript, highlighting the pros and cons of each approach.
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