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test normal vs spread_v2
(version: 0)
Comparing performance of:
normal vs spread
Created:
2 years ago
by:
Guest
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Tests:
normal
const ret = { a: '1', b: '2', c: '3', }; const z = ret['a'] + ret['b'] + ret['c']
spread
const ret = { ...{a: '1'}, ...{b: '2'}, ...{c: '3'} } const z = ret['a'] + ret['b'] + ret['c']
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Suite status:
<idle, ready to run>
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Test case name
Result
normal
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 JSON data to understand what is being tested and the different approaches compared. **Benchmark Definition** The benchmark definition represents a JavaScript expression that calculates the sum of three string values stored in an object: `a`, `b`, and `c`. The same expression is used for both test cases, but with different approaches: 1. **Normal approach**: The strings are concatenated using the `+` operator directly on the object keys (`ret['a'] + ret['b'] + ret['c']`). This is a simple, straightforward way to access and manipulate the values in the object. 2. **Spread operator approach** (`spread_v2`): The spread operator (`...`) is used to create a new object that includes only the properties `a`, `b`, and `c`. Then, these properties are accessed as if they were individual variables and concatenated using the `+` operator. **Options Compared** The benchmark compares the performance of the two approaches: 1. **Normal approach**: Direct concatenation of strings using `+` on object keys. 2. **Spread operator approach** (`spread_v2`): Using the spread operator to create a new object with only the desired properties and then concatenating them. **Pros and Cons** **Normal approach:** Pros: * Simple, straightforward, and easy to understand. * No additional memory allocation or overhead is introduced by creating a new object. Cons: * May be slower due to the repeated lookup of object keys using `[]` indexing. * Can lead to unexpected behavior if the order of properties in the original object changes. **Spread operator approach (`spread_v2`):** Pros: * More expressive and easier to read, especially for developers familiar with the spread operator syntax. * Can be faster because it avoids repeated lookups of object keys using `[]` indexing. Cons: * May introduce additional memory allocation overhead due to creating a new object. * Requires familiarity with the spread operator syntax, which can be confusing for some developers. **Library and Purpose** The benchmark does not use any external libraries. However, it does utilize built-in JavaScript features like object literals (`{...}`) and the spread operator (`...`). **Special JS Features or Syntax** The benchmark uses the spread operator (`...`) to create a new object with only the desired properties. This is a relatively recent feature in JavaScript (introduced in ECMAScript 2018) that allows for more concise and expressive code. **Alternatives** Other alternatives for accessing and manipulating object values could include: 1. Using `Object.keys()` or `Object.values()` to get an array of keys or values, respectively, and then iterating over them. 2. Using a library like Lodash or Ramda to provide a more functional programming style for working with objects. 3. Using a different data structure, such as an array, to store the properties instead of an object. However, these alternatives may introduce additional complexity or overhead compared to the simple approaches used in the benchmark.
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