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new-date-vs-date-settime-fixed
(version: 0)
Comparing performance of:
new Date() vs setTime() vs BASE
Created:
2 years ago
by:
Guest
Go to the latest result
Script Preparation code:
var date = new Date(); var now = Date.now(); var nums = []; for (var i = 0; i < 1000; i++) { nums[i] = now + i; }
Tests:
new Date()
var len = nums.length; var d; for (var i = 0; i < len; i++) { d = new Date(nums[i]); }
setTime()
var len = nums.length; var d = now; for (var i = 0; i < len; i++) { d.setTime(nums[i]); }
BASE
var len = nums.length; var d; for (var i = 0; i < len; i++) { d = nums[i]; }
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
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Test case name
Result
new Date()
setTime()
BASE
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
2 years ago
)
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/118.0.0.0 Safari/537.36
Browser/OS:
Chrome 118 on Windows
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<iframe src="https://measurethat.net/Embed?id=515238" width="100%" height="500px"></iframe>
BASE
17K/s
new Date()
4K/s
setTime()
0/s
View exact numbers
Test name
Executions per second
✓
BASE
16,964 Ops/sec
new Date()
4,379 Ops/sec
setTime()
0 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's dive into explaining the benchmark. **What is being tested?** The provided JSON represents a JavaScript microbenchmark that measures the performance of three different approaches to create and manipulate Date objects: 1. Creating a new Date object using `new Date()` 2. Setting the time of an existing Date object using `setTime()` 3. Directly assigning a timestamp value to a variable without creating a Date object (`BASE`) **Options compared:** * **new Date()**: Creates a new Date object and sets its time property. * **setTime()**: Sets the time property of an existing Date object. * **BASE**: Does not create or manipulate Date objects, instead directly assigning a timestamp value to a variable. **Pros and Cons of each approach:** 1. **new Date()**: * Pros: Simple and efficient way to create a new Date object, especially when working with JavaScript's built-in functionality. * Cons: Can be slower than other approaches since it involves creating a new object instance. 2. **setTime()**: * Pros: Fastest approach among the three, as it only updates an existing Date object without creating a new one. * Cons: Requires an existing Date object to work with, which might not always be available or convenient to obtain. 3. **BASE**: * Pros: Does not create any objects, making it potentially faster and more efficient than the other approaches. * Cons: Directly assigns a timestamp value to a variable, which can lead to unexpected behavior if the variable is used in a way that assumes it's a Date object. **Library usage:** None of the provided benchmark definitions use any external libraries. However, note that `Date` and `Math` are built-in JavaScript objects. **Special JS feature or syntax:** There are no special JS features or syntax mentioned in this benchmark definition.
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new Date().getTime() vs Date.now()
Date.now() vs new Date()
Date.now() - Date.now() vs new Date() - new Date()
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