Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
another push vs unshift
(version: 0)
Comparing performance of:
push vs unshift
Created:
6 years ago
by:
Registered User
Jump to the latest result
Tests:
push
const a = [] for (let i = 1000; i; --i) a.push(i)
unshift
const b = [] for (let i = 1000; i; --i) b.unshift(i)
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
Fork
Test case name
Result
push
unshift
Fastest:
N/A
Slowest:
N/A
Latest run results:
No previous run results
This benchmark does not have any results yet. Be the first one
to run it!
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'll break down the provided benchmark definition and explain what's being tested, compared, and its pros and cons. **Benchmark Definition** The test case consists of two individual benchmark definitions: 1. `const a = []\r\nfor (let i = 1000; i; --i) a.push(i)` 2. `const b = []\r\nfor (let i = 1000; i; --i) b.unshift(i)` **What's being tested** These benchmark definitions test the performance of two common array manipulation methods in JavaScript: * `push`: adding an element to the end of an array * `unshift`: inserting an element at the beginning of an array The benchmarks are designed to measure which method is faster for large arrays. **Comparison of options** There are two primary approaches being compared here: 1. **Using `push`**: This approach involves using the `push` method to add elements to the end of an array. 2. **Using `unshift`**: This approach involves using the `unshift` method to insert elements at the beginning of an array. **Pros and cons of each approach** **Push:** Pros: * Faster for inserting elements at the end of an array, as it only requires a single pointer update * Less memory allocation overhead compared to `unshift` Cons: * Slower for inserting elements at the beginning of an array, as it requires iterating over all existing elements **Unshift:** Pros: * Faster for inserting elements at the beginning of an array, as it involves less pointer updates and can be optimized using a single loop * Can be more efficient when inserting many elements at the beginning of an array Cons: * Slower for appending elements to the end of an array, as it requires iterating over all existing elements * More memory allocation overhead compared to `push` **Library usage** In this case, no libraries are explicitly mentioned. **Special JS feature or syntax** There is no special JavaScript feature or syntax used in these benchmark definitions. The tests only involve basic JavaScript array operations. **Other alternatives** If you wanted to test other approaches, you could consider: * Using `splice` instead of `push` or `unshift` * Comparing different array initialization methods (e.g., using an empty array literal `{}` instead of `[]`) * Testing the performance of alternative data structures, such as linked lists or sets Keep in mind that these alternatives might not provide meaningful results and may even increase complexity.
Related benchmarks:
Array .push() vs .unshift()
Array .push() vs .unshift() + ref to last
Array .push() vs .unshift() vs spread
Array .push() vs .unshift() multiple
Array .push() vs .unshift() |
Comments
Confirm delete:
Do you really want to delete benchmark?