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Array.prototype.splice vs spread operator with slice for removal of entity
(version: 0)
Compare the new ES6 spread operator with the traditional splice() method
Comparing performance of:
slice with spread operator vs splice operator
Created:
6 years ago
by:
Guest
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Tests:
slice with spread operator
var params = [ "hello", true, 7, "test" ]; var other = [...params.slice(0, 1), ...params.slice(2)];
splice operator
var params = [ "hello", true, 7, "test" ]; var other = params.splice(1, 1);
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Suite status:
<idle, ready to run>
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Test case name
Result
slice with spread operator
splice operator
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's dive into the world of JavaScript microbenchmarks! **Benchmark Overview** The provided JSON represents a benchmark test case on MeasureThat.net, which compares the performance of two approaches: using the spread operator (`...`) with `slice()` for removing an entity from an array, and using the traditional `splice()` method. **Options Compared** Two options are compared in this benchmark: 1. **Spread Operator with Slice**: This approach uses the spread operator (`...`) to create a new array that includes elements before and after the specified index. The `slice()` method is used to extract the desired range of elements from the original array. 2. **Traditional Splice Method**: This approach uses the `splice()` method to remove an element at a specified index. **Pros and Cons** Both approaches have their advantages and disadvantages: * **Spread Operator with Slice**: + Pros: More readable, concise code; avoids modifying the original array (returns a new array). + Cons: May incur higher overhead due to creating a new array. * **Traditional Splice Method**: + Pros: Can be more efficient for large arrays, as it only modifies the existing array. + Cons: Modifies the original array, which can be undesirable in some cases. **Library and Purpose** None of the libraries are explicitly mentioned in the provided JSON. However, the `slice()` method is a built-in JavaScript method that belongs to the Array prototype. **Special JS Feature or Syntax** The benchmark uses the spread operator (`...`), which was introduced in ECMAScript 2015 (ES6). The spread operator allows for creating new arrays by including elements from an existing array, and it's often used as a shorthand for `Array.prototype.slice()` with the spread syntax. **Other Alternatives** Other alternatives to compare performance could be: * Using `concat()` instead of the spread operator * Using `filter()` instead of `splice()` * Comparing different browsers or Node.js versions Keep in mind that the specific alternatives will depend on the goals and requirements of the benchmark. I hope this explanation helps you understand the benchmark and its options!
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