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new Func vs plain
(version: 0)
func
Comparing performance of:
Func vs Plain
Created:
5 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
var func = new Function("return 2 * 3"); var f2 = function() { return 2*3; }
Tests:
Func
func();
Plain
f2();
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
Func
Plain
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided JSON and explain what's being tested. **Benchmark Definition** The benchmark definition is used to specify how the test case should be executed. In this case, it's testing two different approaches: 1. **new Func vs plain**: This option is comparing a new `Function` constructor with a traditional anonymous function (using the `function` keyword). The purpose of this comparison is to evaluate which approach is more efficient in terms of performance. **Script Preparation Code** The script preparation code is where the test case is defined. For both options, the same code is used: ```javascript var func = new Function("return 2 * 3"); var f2 = function() { return 2*3; }; ``` Here's what's happening in this code: * `new Function` creates a new function with the specified string as its body. In this case, the body is "return 2 * 3". * `function` keyword defines an anonymous function with the same body. * Both functions are assigned to variables `func` and `f2`, respectively. **Purpose of Libraries** In this test case, there isn't a specific library being used. However, it's worth noting that using a `Function` constructor can be useful in certain scenarios, such as creating dynamic functions or handling function arguments with different data types. **Special JavaScript Features or Syntax** This test case doesn't appear to use any special JavaScript features or syntax. It only uses standard JavaScript constructs like `function`, variable declarations, and the `new` operator. **Other Alternatives** If you're looking for alternative ways to create functions in JavaScript, here are a few options: * Using an immediately invoked function expression (IIFE): `(function() { ... }())` * Using a arrow function: `() => { return 2 * 3; }` * Using the `eval` function: `eval("return 2 * 3")` Keep in mind that each of these alternatives has its own pros and cons, and may not be suitable for all use cases. **Benchmark Results** The benchmark results show the execution time for both options (`new Func` and plain) on a Mac OS X 10.15.4 desktop browser. The results indicate that the plain option is slightly faster than the `new Func` option, with an average of 9129946 executions per second compared to 9146855 seconds for `new Func`. Overall, this benchmark helps determine which approach (using a `Function` constructor or a traditional anonymous function) is more efficient in terms of performance.
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