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Push x spread
(version: 0)
Comparing performance of:
Spread vs Push
Created:
2 years ago
by:
Guest
Go to the latest result
Tests:
Spread
const arr = [1, 2]; const newArr = [...arr, 3];
Push
const arr = [1, 2]; arr.push(3);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
Fork
Test case name
Result
Spread
Push
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
2 years ago
)
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36
Browser/OS:
Chrome 126 on Mac OS X 10.15.7
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=530504" width="100%" height="500px"></iframe>
Push
40.1M/s
Spread
26.4M/s
View exact numbers
Test name
Executions per second
✓
Push
40,051,772 Ops/sec
Spread
26,375,142 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided benchmark and explain what's being tested. **Benchmark Definition** The provided JSON defines two simple JavaScript microbenchmarks: 1. **Push x**: This benchmark tests the performance of pushing an element onto an array using the `push()` method. 2. **Spread**: This benchmark tests the performance of spreading a value into an array using the spread operator (`...`). **Options Compared** The "Push" and "Spread" benchmarks compare two different approaches to achieve the same result: 1. Using the `push()` method: ```javascript arr.push(3); ``` 2. Using the spread operator (`...`): ```javascript const newArr = [...arr, 3]; ``` **Pros and Cons of Each Approach** **Push() Method:** Pros: * More explicit and readable code * Can be more efficient if the array is large and you don't need to access the newly added element Cons: * May incur additional overhead due to function calls and array resizing * Less concise than the spread operator approach **Spread Operator (`...`):** Pros: * More concise and expressive code * Can be more efficient for smaller arrays or when readability is important Cons: * May incur additional overhead due to creating a new array copy * Less intuitive for beginners **Library Usage** None of the provided benchmarks use any external libraries. **Special JS Features/Syntax** The spread operator (`...`) was introduced in ECMAScript 2015 (ES6) as part of the JavaScript language specification. It allows you to expand an iterable into individual elements, which can then be used or processed further. **Other Alternatives** For the "Push" method, other alternatives could include: * Using `arr.length++` to increment the array's length * Using a loop to add elements to the array For the spread operator (`...`), other alternatives could include using other array methods like `concat()` or implementing a custom concatenation function. **Benchmark Preparation Code** The provided JSON does not specify any preparation code, which means that the benchmarks are likely designed to be simple and straightforward. The preparation code is usually used to initialize variables, create arrays, or perform other setup tasks before running the benchmark. In this case, it seems that the tests start with a pre-defined array `[1, 2]` and then either push an element onto it or spread another value into it. **Device and Browser Considerations** The provided benchmark results are from Chrome 126 on a desktop device with Mac OS X 10.15.7. The results may vary depending on the browser, operating system, and device used for testing.
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