var params = [ "hello", true, 7 ]
var other = [ params, 3 ]
var params = [ "hello", true, 7 ]
params.push(3)
--enable-precise-memory-info
flag.
Test case name | Result |
---|---|
Test using spread | |
Testt using push |
Test name | Executions per second |
---|---|
Test using spread | 8857137.0 Ops/sec |
Testt using push | 14701323.0 Ops/sec |
Let's dive into the world of MeasureThat.net and analyze the provided benchmark.
Benchmark Overview
MeasureThat.net is a platform that allows users to create and run JavaScript microbenchmarks. The goal is to compare different approaches and identify the most efficient way to achieve a specific task.
Test Cases
There are two test cases:
**: This test case uses the spread operator (
...`) to concatenate an array.
var params = ["hello", true, 7]; var other = [...params, 3];
The pro of this approach is that it's concise and readable. However, some older JavaScript versions (prior to ECMAScript 2018) might not support the spread operator.
2. **"Test using push"`**: This test case uses the `push()` method to add an element to an array.
```javascript
var params = ["hello", true, 7];
params.push(3);
The pro of this approach is that it's widely supported across older JavaScript versions.
Library and Special JS Features
In both test cases, there is no explicit mention of a library being used. However, the use of the spread operator (...
) might not be compatible with very old browsers or environments.
There are also special JS features (like async/await, let const, etc.) which aren't explicitly mentioned.
Other Considerations
Both approaches have their own trade-offs:
push()
can make the code more verbose.Alternatives
For this particular benchmark, there aren't many alternatives since it's focused on comparing two simple approaches to array concatenation. However, some potential alternative benchmarks could explore other aspects of JavaScript performance, such as:
new Object()
) versus assigning literals to properties (e.g., var obj = { a: 1, b: 2 };
).map()
, filter()
, and reduce()
against equivalent loops.function
keyword) impact execution time.Keep in mind that the choice of benchmark ultimately depends on the specific use case or performance requirement you're trying to measure.