Toggle navigation
MeasureThat
.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
new paren
(version: 1)
Comparing performance of:
paren outside vs paren inside
Created:
one year ago
by:
Guest
Go to the latest result
HTML Preparation code:
<!--your preparation HTML code goes here-->
Tests:
paren outside
(new Set).add(0)
paren inside
new Set().add(0)
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
Fork
Test case name
Result
paren outside
paren inside
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
one year ago
)
User agent:
Mozilla/5.0 (X11; CrOS x86_64 14541.0.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/132.0.0.0 Safari/537.36
Browser/OS:
Chrome 132 on Chrome OS 14541.0.0
View result in a separate tab
Embed
Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=587656" width="100%" height="500px"></iframe>
paren inside
16.0M/s
paren outside
15.9M/s
View exact numbers
Test name
Executions per second
✓
paren inside
15,983,022 Ops/sec
paren outside
15,854,892 Ops/sec
Autogenerated LLM Summary
(model
gpt-4o-mini
, generated one year ago):
The benchmark represented in the provided JSON compares two different JavaScript expressions aiming to test their performance with the `Set` data structure. The primary focus is on the syntax differences in how the `add` method is invoked on the `Set` object. ### Test Cases There are two test cases defined in the benchmark: 1. **"paren outside"**: This test case uses the expression: ```javascript (new Set).add(0) ``` Here, the `Set` constructor is called, and the parentheses around it are outside of the constructor call. 2. **"paren inside"**: This test case uses the expression: ```javascript new Set().add(0) ``` In this case, the `Set` constructor is called normally without additional parentheses, and then the `add` method is directly invoked on the newly-created `Set` object. ### Pros and Cons of Each Approach **Parentheses Outside (`(new Set).add(0)`):** - **Pros:** - It is somewhat concise since it puts the `Set` object creation in parentheses. - **Cons:** - Using parentheses might imply a level of precedence, which generally isn't necessary in this context. - Some developers may find it less readable, as it deviates from the common practice of directly instantiating objects and immediately calling methods. **Parentheses Inside (`new Set().add(0)`):** - **Pros:** - This is the more conventional syntax to create a new object and access its methods, enhancing readability and maintaining code clarity. - It clearly separates the construction of the `Set` object and its method invocation, making it easier for others to understand the code. - **Cons:** - Few (if any) downsides; this syntax generally aligns with typical JavaScript practices and conventions. ### Benchmark Results The results from the benchmark reveal the following performance metrics: - For the **"paren inside"** approach, the execution rate was **15,983,022 executions per second**. - For the **"paren outside"** approach, the execution rate was slightly lower at **15,854,892 executions per second**. ### Other Considerations - The difference in execution speed between the two expressions is minor, but it highlights how even small variations in syntax can have implications on performance in JavaScript execution engines. - Although the performance metrics indicate a small difference, it is essential to consider that such differences may become more significant in larger-scale applications or when performing similar operations in loops or intensive calculations. ### Alternatives and Additional Considerations Other alternatives to `Set` for storing unique values in JavaScript include arrays combined with the use of `Array.prototype.includes()` for uniqueness checks, though it is generally less performant. In performance-critical applications, leveraging types like `WeakSet` could also be beneficial as it allows for the addition of objects that are only kept weakly, enabling garbage collection if there are no other references to them. In summary, this benchmark investigates two syntactical approaches to utilizing the `Set` constructor in JavaScript, reinforcing best practices in terms of code clarity and readability while also revealing negligible performance differences between the two methods.
Related benchmarks
Math.ceil
Comments
Confirm delete:
Do you really want to delete benchmark?