<input id="Main_LabelConnectionString" />
var isEmpty = function(el){
return !$.trim(el.val())
}
var checkEmpty = function(element){
if (isEmpty(element)) {
element.removeClass('active');
} else {
element.addClass('active');
}
};
$('#Main_LabelConnectionString').on('keyup', function(){
checkEmpty($(this));
});
$('#Main_LabelConnectionString').on('keyup', function(){
if (isEmpty($(this))) {
element.removeClass('active');
} else {
element.addClass('active');
}
});
--enable-precise-memory-info
flag.
Test case name | Result |
---|---|
Function outside | |
Code inside |
Test name | Executions per second |
---|---|
Function outside | 295938.9 Ops/sec |
Code inside | 307546.2 Ops/sec |
Let's break down the provided JSON data and explain what's being tested, compared, and analyzed.
Benchmark Overview
The benchmark is designed to measure the performance of two different approaches for updating the active class on an HTML input element based on user input. The test case uses a JavaScript function that checks if the input field is empty and updates the active class accordingly.
Script Preparation Code
The script preparation code defines a utility function isEmpty
that takes an element as an argument and returns true
if the element's value is empty after trimming whitespace.
var isEmpty = function(el){\r\n return !$.trim(el.val()\r\n);
This function is used in both test cases.
Html Preparation Code
The HTML preparation code defines a simple input field with an ID of Main_LabelConnectionString
.
<input id="Main_LabelConnectionString" />
This input field will be the target for the test cases.
Test Cases
There are two individual test cases:
var checkEmpty = function(element){\r\n if (isEmpty(element)) {\r\n element.removeClass('active');\r\n } else {\r\n element.addClass('active');\r\n }\r\n}; $('#Main_LabelConnectionString').on('keyup', function(){\r\n checkEmpty($(this));\r\n});
The advantage of this approach is that it avoids the overhead of creating a new scope for the event listener.
2. **Code inside**: This test case moves the function definition inside the event listener.
```javascript
$('#Main_LabelConnectionString').on('keyup', function(){\r\n if (isEmpty($(this))) {\r\n element.removeClass('active');\r\n } else {\r\n element.addClass('active');\r\n }\r\n});
The disadvantage of this approach is that it creates a new scope for the event listener, which can lead to performance issues.
Benchmark Result
The latest benchmark result shows two test cases with different numbers of executions per second:
Based on this result, the function definition outside the event listener performs slightly better.
Library
There is no explicitly mentioned library in the provided JSON data. However, jQuery is used implicitly through the $
symbol and other functions like trim
.
Special JS Feature/Syntax
There are no special JavaScript features or syntaxes used in this benchmark.
Other Considerations
When writing benchmarks like this one, it's essential to consider factors such as:
Alternatives
Some alternative approaches to benchmarking JavaScript performance include: