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Adding random property in array.
(version: 1)
Comparing performance of:
Add array item vs Add random property vs No addition
Created:
5 years ago
by:
Registered User
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Tests:
Add array item
const a = [1, 2, 3]; a[3] = 4
Add random property
const a = [1, 2, 3]; a.metadata = 4;
No addition
const a = [1, 2, 3, 4];
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
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Test case name
Result
Add array item
Add random property
No addition
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided benchmark test cases and explain what's being tested. **Benchmark Definition JSON** The benchmark definition is an empty object, which means that the script preparation code and HTML preparation code are not required for this specific benchmark. The script will be executed directly in the browser, and the results will be measured. **Individual Test Cases** There are three test cases: 1. **"Add array item"`** * Benchmark Definition: `const a = [1, 2, 3];\r\na[3] = 4` * This test case is designed to measure the performance of adding an element at a specific index in an array using bracket notation. 2. **"Add random property"`** * Benchmark Definition: `const a = [1, 2, 3];\r\na.metadata = 4;` * This test case is designed to measure the performance of setting a new property on an object (in this case, an array) using dot notation. 3. **"No addition"`** * Benchmark Definition: `const a = [1, 2, 3, 4];` * This test case is a control case that measures the baseline execution time of simply creating an array. **Options Compared** In this benchmark, two different approaches are compared: 1. **Bracket notation (`a[3] = 4`)**: This approach uses bracket notation to access and modify the array element. 2. **Dot notation (`a.metadata = 4`)**: This approach uses dot notation to access and modify a new property on the object. **Pros and Cons** * Bracket notation: + Pros: concise, efficient way to access array elements + Cons: can be less readable for complex or nested arrays * Dot notation: + Pros: more explicit and readable way to set properties on objects + Cons: may be slower due to the overhead of creating a new property **Library Usage** There is no library usage in these test cases. The script execution will rely solely on the JavaScript engine. **Special JS Features or Syntax** None of these test cases use any special JavaScript features or syntax that would require additional explanation. **Other Alternatives** If you want to measure performance differences between these approaches, you might consider using: * Using `Array.prototype.splice()` instead of bracket notation * Using a library like Lodash or Ramda to perform array operations * Using a different data structure, such as an object with nested properties However, for this specific benchmark, the focus is on measuring the performance difference between bracket notation and dot notation, so these alternatives might not be relevant.
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