<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(){
var $this = $(this);
if (isEmpty($this)) {
$this.removeClass('active');
} else {
$this.addClass('active');
}
});
--enable-precise-memory-info
flag.
Test case name | Result |
---|---|
Function outside | |
Code inside |
Test name | Executions per second |
---|---|
Function outside | 287507.9 Ops/sec |
Code inside | 305265.5 Ops/sec |
I'd be happy to help you understand the JavaScript microbenchmark provided by MeasureThat.net.
Benchmark Overview
The benchmark is designed to measure the performance difference between two approaches: executing code inside or outside of an event handler (in this case, a keyup
event on an input element). The benchmark compares the execution time of these two approaches in a controlled environment.
Options Compared
The two options being compared are:
Pros and Cons
Code Inside:
Pros:
Cons:
Function Outside:
Pros:
Cons:
Library Used
In this benchmark, the isEmpty
function is used to check whether an input element is empty. This function is likely part of a utility library or framework that provides common DOM manipulation functions. The jQuery
library is also being used for DOM manipulation and event handling.
JavaScript Feature/Syntax
The benchmark uses modern JavaScript features such as:
checkEmpty(element) => { ... }
)var $this = $(this);
)function checkEmpty(element) { ... }
)These features are widely supported in most modern browsers, but may not be compatible with older versions or specific environments.
Other Alternatives
If you're interested in exploring alternative approaches to this benchmark, here are a few options:
Keep in mind that these alternatives may not necessarily change the fundamental comparison between executing code inside or outside an event handler, but they can provide different insights into JavaScript execution performance.