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fill vs manual fill
(version: 0)
Comparing performance of:
fill vs manual fill
Created:
2 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
var array = new Float32Array(1000000);
Tests:
fill
array.fill(Math.random());
manual fill
for (let n = 0, length = array.length, v = Math.random(); n < length; n++) array[n] = v;
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
fill
manual fill
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 and explain what's being tested, compared, and their pros and cons. **Benchmark Definition** The JSON represents two test cases for filling an array with random values: 1. **`array.fill(Math.random());`**: This is a method call on the `Array.prototype.fill()` method, which fills all elements of the array with the value of `Math.random()`. The purpose of this benchmark is to measure how quickly the browser can fill an array using this built-in method. 2. **`for (let n = 0, length = array.length, v = Math.random(); n < length; n++) array[n] = v;`**: This is a manual loop that iterates over the array elements and assigns a random value to each element. The purpose of this benchmark is to measure how quickly the browser can manually fill an array using a loop. **Comparison** The two benchmarks are designed to compare the performance of filling arrays using built-in methods (`fill()`) versus manual loops. **Pros and Cons:** * **Built-in `fill()` method**: + Pros: - Faster execution time, as it's optimized for performance. - Less code to write and maintain. - More readable, as it's a standard JavaScript method. + Cons: - Limited control over the filling process (e.g., no possibility to fill only certain elements). - May not be suitable for all use cases where manual control is required. * **Manual loop**: + Pros: - More control over the filling process, allowing for custom logic and edge cases. - Can be used in situations where built-in methods are not available or sufficient. + Cons: - Slower execution time, as it involves more code and iterations. - Less readable, especially for complex loops. **Library and Special JS Features** There are no libraries or special JavaScript features mentioned in the provided benchmark. It only uses standard JavaScript syntax and built-in methods (e.g., `Array.prototype.fill()`). **Alternatives** If you're looking to benchmark array filling performance, other alternatives might include: * Using a different data structure, such as an array buffer or a Typed Array. * Measuring the performance of different types of loops, like `forEach`, `map`, or `reduce`. * Comparing the performance of various programming languages or JavaScript engines. Keep in mind that benchmarking can be complex and nuanced. Factors like system resources, input data size, and optimization techniques can significantly affect results.
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fill test
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