Toggle navigation
MeasureThat
.net
Create a benchmark
Tools
Feedback
Feature Requests
FAQ
Register
Log In
array test
(version: 0)
Benchmark.js
Comparing performance of:
pre-allocated vs variable size
Created:
9 years ago
by:
Guest
Go to the latest result
Tests:
pre-allocated
for(var test = new Array(1000), i = 0; i < 1000; i++) test.push(i)
variable size
for(var test = new Array(), i = 0; i < 1000; i++) test.push(i)
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
Fork
Test case name
Result
pre-allocated
variable size
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
4 months ago
)
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.36
Browser/OS:
Chrome 147 on Windows
View result in a separate tab
Embed
Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=628320" width="100%" height="500px"></iframe>
pre-allocated
596K/s
variable size
545K/s
View exact numbers
Test name
Executions per second
✓
pre-allocated
595,616 Ops/sec
variable size
544,930 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's dive into explaining the provided benchmark. **What is being tested?** MeasureThat.net is testing how fast different browsers can create and populate an array of varying sizes using JavaScript. There are two test cases: 1. **Pre-allocated**: This test case creates a new array with a fixed size of 1000 elements and then populates it with numbers from 0 to 999. 2. **Variable Size**: This test case creates a new empty array and then uses a loop to push numbers from 0 to 999 onto the array. **Options being compared** The two main options being compared are: 1. **Pre-allocated Array**: Creating an array with a fixed size beforehand and populating it in one go. 2. **Variable Size Array**: Creating an empty array and then dynamically adding elements to it using a loop. **Pros and Cons of each approach:** * **Pre-allocated Array**: + Pros: - The browser can allocate memory for the entire array at once, which might be more efficient since it avoids frequent resizing. - It's generally faster since there's less work to do in terms of allocating and updating array elements. + Cons: - If the allocation fails or is not possible (e.g., due to resource constraints), the test will fail. * **Variable Size Array**: + Pros: - This approach allows for more realistic scenarios where arrays are created dynamically, which might happen in real-world applications. + Cons: - It's generally slower since the browser has to frequently resize and allocate memory as elements are added. **Library usage** There doesn't seem to be any explicit library usage in these test cases. However, it's worth noting that MeasureThat.net is designed to work with a wide range of browsers and environments, which might involve using some underlying libraries or frameworks. **Special JavaScript features or syntax** There isn't anything explicitly special about the code snippets provided; they're just standard JavaScript for loops. **Other considerations** When designing benchmarks like this, it's essential to consider factors such as: * Relevance: Is the test case relevant to real-world scenarios? * Realism: Does the benchmark accurately reflect the typical use cases and edge cases of the technology being tested? * Consistency: Are the test conditions consistent across different browsers or environments? **Other alternatives** If you're looking for alternative benchmarking frameworks, some popular options include: 1. **BenchmarkJS**: A modern benchmarking framework that supports a wide range of programming languages, including JavaScript. 2. **JSLint/Benchmarks**: A set of tools developed by Douglas Crockford that includes a benchmarking module for testing JavaScript code performance. 3. **Google's Chrome DevTools**: Offers a built-in benchmarking feature for testing web page and application performance. I hope this explanation helps!
Related benchmarks
Populate array: array literal vs array constructor
Comments
Confirm delete:
Do you really want to delete benchmark?