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Array Push vs pointer
(version: 0)
benchmark array pointers append vs push
Comparing performance of:
Push vs Pointer
Created:
7 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
var test = [] var idx = 0;
Tests:
Push
for ( i = 0; i < 10000; i++ ) { test.push(i) }
Pointer
for ( i = 0; i < 10000; i++ ) { test[i] = i }
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
Push
Pointer
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 dive into the explanation of the provided benchmark. **What is being tested?** The benchmark tests two approaches to append or assign values to an array in JavaScript: 1. Using `push()`: This method appends a new value to the end of the array and returns the length of the array. 2. Using pointer assignment (`test[i] = i`): This approach assigns a value directly to the `i-th` element of the array. **Options compared** The two approaches are being compared in terms of performance, specifically execution speed per second (ExecutionsPerSecond). **Pros and cons** * **Push()**: + Pros: Easy to read and maintain, less prone to errors due to its explicit nature. + Cons: Can be slower than pointer assignment because it involves creating a new array element and copying the value. * **Pointer assignment (`test[i] = i`)**: + Pros: Faster execution speed per second since it directly accesses and modifies the array element without creating a new one. + Cons: More prone to errors, especially when dealing with large arrays or complex data structures. **Library usage** There is no explicit library mentioned in the benchmark definition. However, Chrome 106 is the browser being tested, which means the benchmark might be using some built-in JavaScript optimizations and features specific to that browser version. **Special JS feature or syntax** This benchmark uses a simple for loop (`for ( i = 0; i < 10000; i++ )`) with array manipulation. There are no special features like async/await, promises, or other advanced JavaScript constructs mentioned in the benchmark definition. **Other alternatives** For this specific use case, other alternatives to the push() and pointer assignment methods might include: * Using `splice()` to insert a new element at a specified index. * Using an array constructor (e.g., `[i]`) instead of push(). * Using a more complex data structure like an array with typed elements or an object with indexed properties. However, it's essential to note that the choice of approach depends on the specific use case and requirements. In this benchmark, push() and pointer assignment are being compared in terms of performance, which might be relevant for certain applications, such as: * Performance-critical code in browser extensions or plugins. * High-performance web applications requiring low latency. Keep in mind that this is just one possible interpretation of the benchmark.
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