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array includes vs some vs indexOf
(version: 0)
Comparing performance of:
Not contained: IndexOf vs Not contained: Includes vs Not contained: Some vs Contained: IndexOf vs Contained: Includes vs Contained: Some
Created:
2 years ago
by:
Guest
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Script Preparation code:
var containedValue = '10079'; var notContainedValue = '79001'; var array = ['10000', '10001', '10002', '10003', '10004', '10005', '10006', '10007', '10008', '10009', '10010', '10011', '10012', '10013', '10014', '10015', '10016', '10017', '10018', '10019', '10020', '10021', '10022', '10023', '10024', '10025', '10026', '10027', '10028', '10029', '10030', '10031', '10032', '10033', '10034', '10035', '10036', '10037', '10038', '10039', '10040', '10041', '10042', '10043', '10044', '10045', '10046', '10047', '10048', '10049', '10050', '10051', '10052', '10053', '10054', '10055', '10056', '10057', '10058', '10059', '10060', '10061', '10062', '10063', '10064', '10065', '10066', '10067', '10068', '10069', '10070', '10071', '10072', '10073', '10074', '10075', '10076', '10077', '10078', '10079', '10080', '10081', '10082', '10083', '10084', '10085', '10086', '10087', '10088', '10089', '10090', '10091', '10092', '10093', '10094', '10095', '10096', '10097', '10098', '10099']
Tests:
Not contained: IndexOf
array.indexOf(notContainedValue) !== -1
Not contained: Includes
array.includes(notContainedValue)
Not contained: Some
array.some(v => v === notContainedValue)
Contained: IndexOf
array.indexOf(containedValue) !== -1
Contained: Includes
array.includes(containedValue)
Contained: Some
array.some(v => v === containedValue)
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (6)
Previous results
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Test case name
Result
Not contained: IndexOf
Not contained: Includes
Not contained: Some
Contained: IndexOf
Contained: Includes
Contained: Some
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 definition and test cases. **Benchmark Definition** The benchmark measures the performance of three different methods for checking if an element is present in an array: 1. `array.indexOf(notContainedValue) !== -1` 2. `array.includes(notContainedValue)` 3. `array.some(v => v === notContainedValue)` These methods are compared to determine which one performs best. **Options Compared** The three options being compared are: * `indexOf`: A method that returns the index of the first occurrence of the specified value, or -1 if it's not found. * `includes`: A method that checks if an element is present in the array using a simple equality check. * `some`: A method that tests whether at least one element in the array satisfies the provided condition. **Pros and Cons** Here are some pros and cons of each approach: * `indexOf`: + Pros: Can return the actual index of the element if found, which can be useful for indexing purposes. However, it returns -1 instead of a boolean value. + Cons: May be slower than other methods due to its more complex implementation. * `includes`: + Pros: Simple and efficient, with an average time complexity of O(n). + Cons: May use more memory if the array is very large, since it needs to store the entire array in memory. * `some`: + Pros: Very lightweight and easy to implement, making it a good choice for small arrays or performance-critical code. + Cons: May return false positives if the condition is not met exactly (e.g., due to floating-point precision issues), although this can be mitigated with careful implementation. **Libraries Used** None are explicitly mentioned in the provided benchmark definition. However, it's likely that the `includes` method uses a library or internal implementation that relies on JavaScript's built-in array methods. **Special JS Features/Syntax** There doesn't seem to be any special JS features or syntax used in this benchmark (e.g., async/await, promises, destructuring). **Other Alternatives** Some other alternatives for checking if an element is present in an array include: * `includes()` with a custom callback function * Using a library like Lodash's `some()` method * Implementing a custom search algorithm using binary search or other optimization techniques In general, the choice of method depends on the specific use case and performance requirements. If simplicity and efficiency are key, `includes()` is likely a good choice. However, if indexing purposes are required, `indexOf()` might be more suitable. And for very large arrays or performance-critical code, custom optimizations or specialized libraries may be necessary.
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array indexOf vs includes vs some w/ largeish array
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