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Multiple OR statements vs. Array Index Of.
(version: 0)
Let's see if multiple OR statements or index Of array is faster.
Comparing performance of:
small array - OR vs small array - indexOf vs large array - OR vs large array - indexOf
Created:
4 years ago
by:
Registered User
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Script Preparation code:
var array = ['a','b','c']; var largeArray = ['a','b','c','d','e','f','g'];
Tests:
small array - OR
if(array[0] === 'c' || array[1] === 'c' || array[2] === 'c'){ console.log('found') }
small array - indexOf
if(array.indexOf('c') !== -1){ console.log('found') }
large array - OR
if(largeArray[0] === 'g' || largeArray[1] === 'g' || largeArray[2] === 'g' || largeArray[3] === 'g' || largeArray[4] === 'g' || largeArray[5] === 'g' || largeArray[6] === 'g' || largeArray[7] === 'g'){ console.log('found') }
large array - indexOf
if(largeArray.indexOf('g') !== -1){ console.log('found') }
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (4)
Previous results
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Test case name
Result
small array - OR
small array - indexOf
large array - OR
large array - indexOf
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 benchmark and explain what is being tested. **What is being tested?** The benchmark measures the performance difference between using multiple `OR` statements versus `indexOf` method to check if a specific value exists in an array. Specifically, the test cases compare: 1. Multiple `OR` statements (`array[0] === 'c' || array[1] === 'c' || array[2] === 'c'`) 2. `indexOf` method (`array.indexOf('c') !== -1`) **Options being compared:** * Multiple `OR` statements * `indexOf` method **Pros and Cons of each approach:** * **Multiple OR statements:** + Pros: - Can be more efficient for small arrays, as it avoids the overhead of the `indexOf` method. - Easy to implement and understand. + Cons: - Can become slow and inefficient for large arrays, as it requires checking every element in the array. - Error-prone if not implemented correctly (e.g., missing or mismatched indices). * **indexOf method:** + Pros: - Generally faster and more efficient than multiple `OR` statements for large arrays. - More concise and easier to maintain, as it avoids manual index checking. + Cons: - Requires the array to be sorted (in ascending order) for optimal performance. - Can throw errors if the value is not found in the array. **Library used:** * `indexOf` method uses the built-in JavaScript function `Array.indexOf()`, which is implemented by the browser engine (e.g., V8 in Chrome). **Special JS feature or syntax:** * The benchmark does not use any special JavaScript features or syntax beyond what is standard for the language. **Other considerations:** * The benchmark assumes that the array elements are strings, and only checks for exact string matches. * There is no consideration for performance variations between different browsers, as the results are consistent across all tested browsers (Chrome 89). **Alternatives:** * Other approaches to check if a value exists in an array include: + Using `includes()` method (introduced in ECMAScript 2019): `array.includes('c')` + Using `reduce()` method with a predicate function: `array.reduce((a, b) => a || b === 'c', false)` + Using a custom implementation with a binary search algorithm. Keep in mind that these alternatives may have different performance characteristics and are not necessarily more efficient than the methods being compared.
Related benchmarks:
Array.includes() vs Array.indexOf()
or operator vs array.find
multi or operator vs array.find
Array Indexation vs. Array Access
array indexOf vs includes vs some w/ largeish array
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