<script>
const arr = [1,2,3,4,5]
</script>
Object.keys(arr)
Object.values(arr)
Object.entries(arr)
--enable-precise-memory-info
flag.
Test case name | Result |
---|---|
Object.keys() | |
Object.values() | |
Object.entries() |
Test name | Executions per second |
---|---|
Object.keys() | 4868134.5 Ops/sec |
Object.values() | 5182158.0 Ops/sec |
Object.entries() | 3512857.2 Ops/sec |
Let's break down the provided JSON and explain what's being tested.
Benchmark Definition
The benchmark measures the performance of three different methods in JavaScript: Object.keys()
, Object.values()
, and Object.entries()
.
These methods are used to extract properties from an object. Specifically, they return:
Object.keys(arr)
: An array of property names (strings) that can be accessed by using the bracket notation (arr['property']
).Object.values(arr)
: An array of property values (values of type x
where x
is a primitive value such as number, string, boolean, etc.).Object.entries(arr)
: An array of key-value pairs, where each pair consists of the key and its corresponding value.Options Compared
The benchmark compares the execution times of these three methods on an input array (arr
). This comparison is useful to determine which method is most efficient for a particular use case.
Pros and Cons
Here's a brief overview of the pros and cons of each approach:
Object.keys()
Object.values()
Object.keys()
due to additional operations (e.g., array indexing and slicing).Object.keys()
, since it creates a new array.Object.entries()
Object.keys()
due to additional operations (e.g., array indexing and slicing).Object.keys()
, since it creates a new array.Library or Special JS Feature
There is no specific library used in this benchmark. However, it's worth noting that the performance of these methods can be influenced by various factors, such as:
Special JS Feature
There are no specific JavaScript features mentioned in this benchmark. However, it's always worth noting that newer versions of JavaScript engines may have introduced optimizations or changes to these methods that could affect their performance.