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Find value in object
(version: 0)
Comparing performance of:
indexOf vs includes vs some vs forEach vs for...in vs for...in (inline)
Created:
3 years ago
by:
Guest
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Script Preparation code:
var obj = { "a": "test1", "b": "test2" };
Tests:
indexOf
Object.values(obj).indexOf('test1')
includes
Object.values(obj).includes("test1");
some
Object.keys(obj).some(function(k) { return obj[k] === "test1"; });
forEach
Object.keys(obj).forEach(function(key) { if (obj[key] == 'test1') { return true; } });
for...in
for (let k in obj) { if (obj[k] === "test1") { return true; } }
for...in (inline)
for (let k in obj) { return obj[k] === "test1" ? true : false; }
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (6)
Previous results
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Test case name
Result
indexOf
includes
some
forEach
for...in
for...in (inline)
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
**What is being tested:** MeasureThat.net is testing the performance of various JavaScript methods for finding values in objects. Specifically, it's comparing different approaches to: * Check if a value exists in an object using `indexOf` and `includes` * Iterate over an object's keys and check if a value matches using `some`, `forEach`, and two variations of `for...in` **Options being compared:** The benchmark is comparing six different methods: 1. **`Object.values(obj).indexOf('test1')`**: Uses the `indexOf` method to search for the string 'test1' in the array of object values. 2. **`Object.values(obj).includes('test1')`**: Uses the `includes` method to check if the string 'test1' is present in the array of object values. 3. **`Object.keys(obj).some(function(k) { return obj[k] === "test1"; })`**: Iterates over the object's keys using `some`, and checks if the value at each key matches 'test1'. 4. **`Object.keys(obj).forEach(function(key) { if (obj[key] == 'test1') { return true; } })`**: Iterates over the object's keys using `forEach`, and checks if the value at each key matches 'test1' using a conditional statement. 5. **`for (let k in obj) { return obj[k] === "test1" ? true : false; }`**: Uses a traditional `for...in` loop to iterate over the object's keys, and checks if the value at each key matches 'test1'. 6. **`Object.keys(obj).forEach(function(key) { return obj[key] === "test1"; })` (inline)**: Similar to option 4, but the conditional statement is inline. **Pros and Cons of each approach:** * `indexOf` and `includes`: Fast and efficient, but may not work as expected if the object's values are not strings. Can be sensitive to performance due to cache misses. * `some` and `forEach`: More flexible and expressive, but can be slower than `indexOf` and `includes`. May have higher overhead due to the iteration over keys. * `for...in`: Traditional approach that may be slower due to the overhead of iterating over the object's prototype chain. Can be more prone to errors if not used carefully. **Other considerations:** * The benchmark is using a fixed test case (an object with two string values) to isolate the performance differences between the different methods. * MeasureThat.net is likely using a combination of caching and memoization to improve performance, as some tests are almost identical. * The `for...in` variations are notable because they use an inline conditional statement, which may be faster due to reduced overhead. **Library and special JS features:** There are no libraries or special JavaScript features used in this benchmark. However, MeasureThat.net's caching and memoization mechanisms might utilize some advanced JavaScript concepts like closures, prototypes, and function hoisting.
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