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Object.keys
(version: 0)
Comparing performance of:
Object.keys vs list keys
Created:
2 years ago
by:
Guest
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Script Preparation code:
var obj = { 'a': 1, 'b': 1, 'c': 1, 'd': 1, 'e': 1, 'f': 1, 'g': 1 };
Tests:
Object.keys
Object.keys(obj).find((k) => !["base", "lg"].includes(k))
list keys
!!obj.a || !!obj.b || !!obj.e || !!obj.f || !!obj.g
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
Object.keys
list keys
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'd be happy to explain the benchmark being measured on MeasureThat.net. **Benchmark Overview** The benchmark is designed to measure the performance of two different approaches for retrieving keys from an object in JavaScript. **Approach 1: Using the `Object.keys()` method with a filter** In this approach, the `Object.keys()` method is used to get an array of key names from the object. The `find()` method is then used to iterate over this array and find the first key that does not include "base" or "lg" in its value. **Approach 2: Using a simple logical OR operation** In this approach, a series of logical OR operations (`||`) are used to check if each property value (e.g., `obj.a`, `obj.b`, etc.) is truthy. If any of the properties have a truthy value, the expression returns true. **Pros and Cons of Each Approach:** 1. **Object.keys() method with filter** * Pros: + More readable code + Easier to understand the intent behind the code + Less chance of off-by-one errors (e.g., missing values) * Cons: + May be slower due to the overhead of creating an array and then filtering it 2. **Simple logical OR operation** * Pros: + Often faster due to the shorter execution path + Can take advantage of CPU caching and branch prediction * Cons: + More prone to off-by-one errors (e.g., missing values) + Less readable code **Other Considerations:** * The benchmark results show that Chrome 117 has a significantly faster execution time for the simple logical OR operation compared to the `Object.keys()` method with filter. * The use of `!!` operator to convert each property value to a boolean is likely used to make the expression more predictable and reliable. **Library Usage:** None of the code snippets in this benchmark appear to use any external libraries or frameworks. **Special JavaScript Features/Syntax:** No special JavaScript features or syntax are being tested in this benchmark. The focus is on comparing two different approaches for retrieving keys from an object using standard JavaScript constructs.
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Increment test
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