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Date toISOString
(version: 0)
Comparing performance of:
1 vs 2
Created:
2 years ago
by:
Guest
Go to the latest result
Tests:
1
const updated = new Date().toISOString()
2
const updated = new Date(Date.now()).toISOString();
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
1
2
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/124.0.0.0 Safari/537.36
Browser/OS:
Chrome 124 on Mac OS X 10.15.7
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<iframe src="https://measurethat.net/Embed?id=521901" width="100%" height="500px"></iframe>
1
625K/s
2
555K/s
View exact numbers
Test name
Executions per second
✓
1
624,620 Ops/sec
2
554,512 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the benchmark and its test cases to understand what's being measured. **Benchmark Definition** The provided JSON represents a basic benchmark definition, which includes: * `Name`: The name of the benchmark, "Date toISOString". * `Description` and `Script Preparation Code`, `Html Preparation Code`: These fields are empty, indicating that no specific description or setup code is required for this benchmark. **Individual Test Cases** The test cases define two different scenarios to measure: 1. `const updated = new Date().toISOString()`: This test case creates a new `Date` object using the current time and converts it to an ISO string format. 2. `const updated = new Date(Date.now()).toISOString();`: This test case creates a new `Date` object by passing the result of `Date.now()` (which returns the number of milliseconds since the Unix epoch) as an argument, and then converts it to an ISO string format. **What's being tested** In both cases, the benchmark is measuring the performance of converting a `Date` object to an ISO string. The main difference between the two test cases lies in how the `Date` object is created: * Test case 1 uses `new Date()`, which creates a new `Date` object based on the current system time. * Test case 2 uses `new Date(Date.now())`, which creates a new `Date` object using the result of `Date.now()` as its timestamp. **Comparison options** The benchmark is comparing two approaches: 1. Using `new Date()` to create a `Date` object based on the current system time. 2. Using `new Date(Date.now())` to create a `Date` object with a specific timestamp. **Pros and Cons** * **Using `new Date()`**: + Pros: Simpler code, less overhead required for timestamp creation. + Cons: May result in different performance characteristics compared to using `Date.now()`, as the system time can vary between runs. * **Using `new Date(Date.now())`**: + Pros: More accurate control over the timestamp used for the `Date` object, potentially leading to more consistent results. + Cons: Requires passing an additional argument (`Date.now()`), which might add minor overhead. **Library usage** There is no explicit library mentioned in the benchmark definition or test cases. However, it's likely that the JavaScript engine (e.g., V8 in Chrome) provides the built-in `Date` and `Date.now()` functions used in the test cases. **Special JS features or syntax** None of the test cases explicitly use any special JavaScript features or syntax beyond what's required for creating a `Date` object.
Related benchmarks
new Date().toISOString() vs new Date().toLocaleString()
Date.now() vs new Date().toISOString()
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