Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
test spread baby
(version: 0)
Comparing performance of:
spread vs assign
Created:
3 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
window.obj = { title: "hello", id: "1", someArray: [ { id: "1" } ], someOtherThing1: "blah", someOtherThing2: "blah", someOtherThing3: "blah", someOtherThing4: "blah", someOtherThing5: "blah", someOtherThing6: "blah", someOtherThing7: "blah", someOtherThing8: "blah", someOtherThing9: "blah", someOtherThing10: "blah", someOtherThing11: "blah", someOtherThing12: "blah", someOtherThing13: "blah", someOtherThing14: "blah", someOtherThing15: "blah", someOtherThing16: "blah", someOtherThing17: "blah", someOtherThing18: "blah", someOtherThing19: "blah", someOtherThing20: "blah", someOtherThing21: "blah", someOtherThing22: "blah", someOtherThing23: "blah", someOtherThing24: "blah", someOtherThing25: "blah", someOtherThing26: "blah", someOtherThing27: "blah", someOtherThing28: "blah", }; window.arr = [];
Tests:
spread
window.arr.length = 0; const newObj = {...window.obj}; window.arr.push(newObj);
assign
window.arr.length = 0; const newObj = Object.assign({}, window.obj); window.arr.push(newObj);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
Fork
Test case name
Result
spread
assign
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):
**What is being tested?** The provided JSON represents two individual test cases for measuring JavaScript microbenchmarks on MeasureThat.net. The tests aim to compare the performance of creating an object using the spread operator (`...`) versus the `Object.assign()` method. **Options compared:** 1. **Spread Operator (`...`)**: This syntax allows you to create a new object by spreading the properties of an existing object. 2. **Object.assign()**: This method creates a new object and copies the properties from an existing object into it. **Pros and Cons:** * **Spread Operator (`...`)**: + Pros: concise, readable, and efficient for simple objects with a few key-value pairs. + Cons: may be slower than `Object.assign()` for larger objects or when dealing with complex property names. * **Object.assign()**: + Pros: widely supported, can handle nested objects and complex property names, and is generally faster than the spread operator. + Cons: less readable and concise compared to the spread operator. In general, the choice between these two methods depends on the specific use case and performance requirements. If readability and conciseness are important, the spread operator might be a better choice. However, if speed and compatibility are crucial, `Object.assign()` is likely a better option. **Library usage:** None of the provided test cases rely on any external libraries. The tests only utilize built-in JavaScript features. **Special JS feature or syntax:** The spread operator (`...`) is a relatively recent addition to JavaScript, introduced in ECMAScript 2018 (ES2018). It allows you to create a new object by spreading the properties of an existing object into a new object. This syntax is widely supported across modern browsers and Node.js environments. **Other alternatives:** For larger objects or complex property names, other methods like `Object.create()` or using a library like Lodash might be more efficient than the spread operator or `Object.assign()`. Additionally, some older browsers or environments might not support the spread operator or `Object.assign()`, requiring alternative solutions.
Related benchmarks:
asdfasdfasdf
Test-BC
EGO concat vs spread Small Array Objects
compare arrays 22
compare arrays 23
Comments
Confirm delete:
Do you really want to delete benchmark?