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Array fill method vs push in for loop
(version: 0)
Array fill method vs push in for loop performance validation
Comparing performance of:
For Loop fill vs Array Fill
Created:
4 years ago
by:
Guest
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Tests:
For Loop fill
let arrayTest = new Array(0); for (let i = 0; i < 10000000; i++){ arrayTest.push(0); }
Array Fill
let arrayTest = new Array(10000000).fill(0);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
For Loop fill
Array Fill
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'd be happy to help you understand the provided benchmark and its test cases. **Benchmark Overview** The provided benchmark is testing the performance of two different methods for filling an array: `Array.fill()` (also known as "array literal" or "spread operator") and a traditional `for` loop with `push()`. The goal is to determine which method is faster in terms of execution time. **Options Compared** There are only two options being compared: 1. **`Array.fill()`**: This method involves creating an array using the `new Array()` constructor and filling it with a specified value (in this case, 0). The number of executions per second for this option is measured in the benchmark result. 2. **Traditional `for` loop with `push()`**: This approach involves creating an empty array, incrementing a counter, and pushing elements onto the array using the `push()` method until it reaches the desired length (100 million in this case). **Pros and Cons of Each Approach** 1. **`Array.fill()`**: * Pros: Efficient use of memory (only creates a single array object), concise syntax. * Cons: May not be supported in older browsers, can throw an error if the array creation fails. 2. **Traditional `for` loop with `push()`**: * Pros: Wide browser support, no additional memory allocation required. * Cons: Less efficient than `Array.fill()`, requires more code and is less concise. **Library Used** None explicitly mentioned in the benchmark definition or test cases. **Special JavaScript Feature/ Syntax** The use of array literals (`new Array(0)`) and the spread operator (`fill()` method) are not considered special features, as they have been part of JavaScript since its inception. However, their efficiency and conciseness can make a significant difference in performance-critical code. **Other Considerations** When writing benchmarks like this one, it's essential to consider factors beyond just execution time, such as: * Memory allocation and usage * Browser-specific optimizations or limitations * Garbage collection and scheduling overhead * Cache behavior and spatial locality In addition to these options, other benchmarking approaches might include: * Comparing the performance of different data structures (e.g., arrays vs. linked lists) * Evaluating the impact of caching mechanisms on benchmark results * Investigating the effects of parallelization or concurrent execution on benchmarks Keep in mind that this benchmark is specifically designed to test the performance of these two array filling methods, so it's focused on those aspects.
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