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Binary search property vs. delegate
(version: 0)
Comparing performance of:
Property vs Delegate
Created:
8 years ago
by:
Guest
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Script Preparation code:
var a = Array(1000).fill(0).map(_ => ({ value: Math.floor(500 * Math.random())}));
Tests:
Property
function find(x, a, getValue) { let min = 0; let max = a.length - 1; while (min <= max) { const guess = Math.floor((min + max) / 2); const item = a[guess]; const itemValue = getValue(item); if (x === itemValue) { return guess; } else if (x < itemValue) { max = guess - 1; } else { min = guess + 1; } } return null; } find (100, a);
Delegate
function find(x, a, getValue) { let min = 0; let max = a.length - 1; while (min <= max) { const guess = Math.floor((min + max) / 2); const item = a[guess]; const itemValue = getValue(item); if (x === itemValue) { return guess; } else if (x < itemValue) { max = guess - 1; } else { min = guess + 1; } } return null; } find (100, a, item => item.value);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
Property
Delegate
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
**Benchmark Explanation** MeasureThat.net is a website that allows users to create and run JavaScript microbenchmarks to compare the performance of different approaches. The provided benchmark tests two approaches for finding an element in an array by its value: **Property** and **Delegate**. The test case uses a library called `Array` which is a built-in JavaScript object representing a dynamic array. **Benchmark Definition JSON** The benchmark definition is represented as a JSON object with the following properties: * `Name`: The name of the benchmark. * `Description`: A brief description of the benchmark (empty in this case). * `Script Preparation Code`: The JavaScript code used to prepare the test environment. In this case, an array `a` is created with 1000 elements, each with a random value between 0 and 500. * `Html Preparation Code`: An empty string indicating that no HTML preparation code is required. **Individual Test Cases** There are two test cases: 1. **Property**: This test case uses the property-based approach to find an element in the array by its value. The JavaScript code defines a function `find` that takes three arguments: `x`, `a`, and `getValue`. It then iterates through the array using a binary search algorithm, comparing each element's value with the target value `x`. 2. **Delegate**: This test case uses a delegate-based approach to find an element in the array by its value. The JavaScript code defines another function `find` that takes three arguments: `x`, `a`, and `getValue`. However, this time it uses the `item => item.value` expression as the delegate, which allows for dynamic evaluation of the `getValue` function. **Options Compared** The benchmark compares two options: 1. **Property**: This approach binds the value to be found (`x`) directly to the property accessed (`item.value`). The `find` function returns the index of the element in the array. 2. **Delegate**: This approach uses a delegate (a higher-order function) to evaluate the `getValue` expression, which allows for dynamic evaluation of the value being searched. **Pros and Cons** * **Property**: + Pros: Simple, easy to understand, and may be faster due to direct access. + Cons: May not work correctly if `x` is not a valid property name or if the array's structure changes. * **Delegate**: + Pros: Dynamic evaluation of the value being searched, may handle cases where the array's structure changes. + Cons: More complex and harder to understand, may be slower due to dynamic evaluation. **Library** The `Array` library is used in both test cases. It provides a dynamic array object that can be manipulated using various methods. **Special JS Feature or Syntax** This benchmark does not use any special JavaScript features or syntax. **Alternatives** If you want to create similar benchmarks, you can consider the following alternatives: * Use other data structures like `Set` or `Map` instead of arrays. * Modify the test cases to involve more complex operations, such as sorting or searching in a large array. * Compare the performance of different programming languages, not just JavaScript. Keep in mind that benchmarking is an art, and the results may vary depending on the specific environment and hardware being tested.
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