Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
Rest parameters vs array parameter with empty parameters
(version: 0)
Comparing performance of:
Rest vs Array vs Rest Empty vs Array Empty vs Array Predefined vs Array Empty Predefined
Created:
4 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
fr = (a, ...b) => a.concat(b.map(String)) fa = (a, b) => a.concat(b.map(String)) af = [1, 2, 3, 4, 5]; ae = [];
Tests:
Rest
const r = fr([0], 1, 2, 3, 4, 5);
Array
const r = fa([0], [1, 2, 3, 4, 5]);
Rest Empty
const r = fr([0]);
Array Empty
const r = fa([0], []);
Array Predefined
const r = fa([0], af);
Array Empty Predefined
const r = fa([0], ae);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (6)
Previous results
Fork
Test case name
Result
Rest
Array
Rest Empty
Array Empty
Array Predefined
Array Empty Predefined
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):
Let's dive into the world of JavaScript microbenchmarks on MeasureThat.net. **Benchmark Definition** The provided JSON defines a benchmark named "Rest parameters vs array parameter with empty parameters". This benchmark tests two different approaches to handling rest parameters (the dots `...` in function arguments) versus using an array as a parameter. **Options Compared** Two options are compared: 1. **Rest Parameters**: Using the syntax `fr = (a, ...b) => a.concat(b.map(String))`. This approach uses the rest parameter syntax to capture any additional arguments passed to the function. 2. **Array Parameter with Empty Parameters**: Using the syntax `fa = (a, b) => a.concat(b.map(String))` and calling it with an array `[0]`, which represents an empty set of parameters. **Pros and Cons** * **Rest Parameters**: + Pros: More concise and expressive way to handle variable-length function arguments. + Cons: May have performance implications due to the need for `map()` on the rest parameter, which can be slower than using a traditional array. * **Array Parameter with Empty Parameters**: + Pros: Can provide a more predictable performance profile, as the number of operations is fixed. + Cons: Less concise and less expressive than rest parameters. **Library** The benchmark uses the `String` function to concatenate strings. This is likely due to the fact that JavaScript's built-in string concatenation operator (`+`) has some issues with Unicode characters, whereas `String()` ensures a consistent behavior across different platforms. **Special JS Feature/Syntax** This benchmark does not use any special or experimental JavaScript features. It only uses standard language syntax and built-in functions. **Other Alternatives** If you're looking for alternative approaches to handling rest parameters, you could consider: * Using `apply()` or `call()` to pass an array of arguments to a function. * Implementing your own custom rest parameter parser. * Using a library like `restify` that provides a more robust and expressive way to handle rest parameters. Keep in mind that the choice of approach depends on your specific use case, performance requirements, and personal preference.
Related benchmarks:
Array concat vs. spread operator
Rest parameters vs array parameter
Array.from() vs new Array() - map
Rest parameters vs array parameter 2
Comments
Confirm delete:
Do you really want to delete benchmark?