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Check mytest
(version: 0)
Comparing performance of:
Boolean vs standard
Created:
3 years ago
by:
Guest
Jump to the latest result
Script Preparation code:
var newArr = ['1', '2', '3', '4'];
Tests:
Boolean
!!newArr.length && 1
standard
newArr.length > 0 && 1
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
Boolean
standard
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'd be happy to explain the benchmark in detail. **Benchmark Overview** The provided JSON represents a JavaScript microbenchmark called `Check mytest` created on MeasureThat.net. The benchmark compares two different approaches to check if an array is not empty. **Script Preparation Code** The script preparation code defines an array `newArr` with four string elements: "1", "2", "3", and "4". This array will be used as the input for the benchmarks. ```javascript var newArr = ['1', '2', '3', '4']; ``` **Html Preparation Code** There is no HTML preparation code, which means that only JavaScript code will be executed for this benchmark. **Benchmark Definition** The benchmark definition specifies two test cases: 1. **Boolean**: `!!newArr.length && 1` * This expression checks if the array `newArr` is not empty using the double negation operator (`!!`). If the array is not empty, the expression evaluates to `true`. 2. **standard**: `newArr.length > 0 && 1` **Comparison** The two benchmarks are compared to determine which approach is faster. **Pros and Cons of each Approach** 1. **Boolean**: `!!newArr.length && 1` * Pros: + Compact code * Cons: + Uses double negation, which can be less readable for some developers 2. **standard**: `newArr.length > 0 && 1` * Pros: + More readable and intuitive than the Boolean approach * Cons: + Longer code **Library** There is no explicit library mentioned in the benchmark definition, but the use of the double negation operator (`!!`) is a JavaScript feature introduced in ECMAScript 2011 (ES6). The `length` property of an array is also a built-in JavaScript property. **Special JS Feature or Syntax** The benchmark uses the double negation operator (`!!`). This operator has two meanings: * In a boolean context, it negates the value, i.e., `!!true === false && !!false === true`. * In a numeric context, it converts the number to its integer equivalent. In this case, the double negation is used to convert the `length` property of the array to a boolean value (`true` or `false`). The `&& 1` part is a common idiom in JavaScript that ensures the expression always evaluates to `true`, even if the `length` property is zero. **Other Alternatives** If you're interested in exploring alternative approaches, here are a few examples: * Using `Object.keys(newArr).length > 0 && 1`: This approach uses the `Object.keys()` method to get an array of keys from the input object (in this case, the `newArr` array) and then checks if the length of that array is greater than zero. * Using `Array.prototype.some.call(newArr, () => true) && 1`: This approach uses the `some()` method on the array to check if at least one element meets a certain condition (in this case, always `true`).
Related benchmarks:
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next test
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