Enhancing JavaScript Execution by Optimizing Global Variables Usage

Within my project, I am utilizing a JavaScript language file that is structured as an object, where all language keys are properties of this object. For example: o_language['name'] = 'Name'. Each PHP view has its own individual .js file, with each file containing a single object consisting of all the functions for that particular view. An example structure:

o_add_card = {
   init: function(){...},
   do_something: function(){..},
   do_something_2: function(){..}
}

In the loader.js file, I load all the necessary objects. However, I am unsure about the most efficient way to call the language object in different scenarios.

1st method - Directly using the global o_language like so:

o_add_card = {
   init: function(){...},
   do_something: function(){
       alert(o_language['name']);
   },
}

2nd method - Assigning the global o_language to an object property:

o_add_card = {
   lang: o_language['name'],
   init: function(){...},
   do_something: function(){
       alert(this.lang['name']);
   },
}

3rd method - Assigning the global o_language to an object property and creating a function variable:

o_add_card = {
   lang: o_language['name'],
   init: function(){...},
   do_something: function(){
       var o_lang = this.lang;
       alert(o_lang ['name']);
   },
}

4th method - Using the global o_language assigned to a function variable:

o_add_card = {
   init: function(){...},
   do_something: function(){
       var o_lang = o_language['name'];
       alert(o_lang ['name']);
   },
}

Ultimately, I am trying to determine which approach is more efficient and whether it is something worth considering.

Answer №1

There is no definitive fastest way to access object properties in JavaScript as it can vary depending on the platform.

Comparing four different methods of accessing object properties, it is important to note that methods 2, 3, and 4 are more complex versions of the first method. Theoretically, the first method would be the fastest.

// Method 1
o_add_card = {
   init: function(){...},
   do_something: function(){
       alert(o_language['name']); 
   },
}

// Method 2
o_add_card = {
   lang: o_language['name'],
   init: function(){...},
   do_something: function(){
       alert(this.lang['name']);
   },
}

// Method 3
o_add_card = {
   lang: o_language['name'],
   init: function(){...},
   do_something: function(){
       var o_lang = this.lang; 
       alert(o_lang ['name']);
   },
}

// Method 4
o_add_card = {
   init: function(){...},
   do_something: function(){
       var o_lang = o_language['name']; 
       alert(o_lang ['name']);
   },
}

Performance differences between these methods are negligible unless called millions of times. Code quality should be the main consideration.

If clarity and maintainability require using extra variables or operations, it is advisable to do so.

In situations where readability and potential future changes are factors, choosing a more elaborate method may be beneficial.

Ultimately, the decision depends on personal preference and specific use cases. Adapt the approach based on what makes the code easier to understand and manage.

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

Saving JSON format in VueX State Management

I'm relatively new to using Vue/VueX and I am exploring methods for storing JSON data in the VueX state. Initially, it seemed like a simple task: state { jsonthing: { ... } } However, I encountered an issue where getters return an Observer type ins ...

"Troubleshooting: Why is my AngularJS ng-repeat failing to

I recently started delving into AngularJS, but I've hit a roadblock with a particular issue. For some reason, the ng-repeat directive isn't iterating through the users array as expected. The resulting list is just blank. Below is a snippet of my ...

Discover the power of JQuery Mobile for implementing swipe functionality exclusively

Dealing with the jquery mobile pack has caused some major headaches for me. It completely disrupted my page by automatically turning links into ajax calls and displaying loading animations. After spending a significant amount of time trying to fix everythi ...

A guide on displaying data in a table using a select dropdown in a pug file and passing it to another pug file

After creating a single page featuring a select dropdown containing various book titles from a JSON file, I encountered an issue. Upon selecting a book and clicking submit (similar to this image), the intention was for it to redirect to another page named ...

Is the AngularJS Date property model sending an incorrect value to the server?

There are some puzzling things I am trying to figure out. When using datetimepicker, the Date and time selected appear correctly on the screenshot. The value in the textbox is accurate The model's value in console is correct (but hold on a second... ...

The list of items in a React Bootstrap Dropdown does not refresh when the state is changed

Trying to implement a dropdown with a list of checkboxes using react-bootstrap. The toggle event on the checkboxes works, but I'm facing an issue where the component is not re-rendered and the checkbox does not reflect the change. Check out the code ...

Can angular and grunt support multiple run blocks simultaneously?

Currently, I am configuring $httpBackend to simulate fake API routes while our team of API developers is building them out. However, I am facing an issue where I have to place all the $httpBackend configurations within my run block. This leads to a situa ...

Steps to turn off Google Analytics while working on a local server:

I implement this code for tracking with Google Analytics, <noscript> <iframe src="//www.googletagmanager.com/ns.html?id=GTM-KCQGLT" height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript> as well as this ...

JavaScript is having trouble retrieving URL variables when there are multiple values in the query string

Currently, I am leveraging a JavaScript function to extract URL values and pass them to jQuery using the following method: function grabUrlValues() { var values = [], hash; var params = window.location.href.slice(window.location.href. ...

Does Somebody Possess a Fine Floating Tag?

Some time ago, I came across this floating label that I have been searching for ever since. I experimented with a few that appeared promising and initially worked well, but they ended up presenting their own issues. Some required the mandatory attribute f ...

Changing the entire content of a webpage from the server using AJAX

I am looking to update the entire page content with the click of a button, transitioning from Words.html to SelectNumber.html This snippet is from Words.html <html> <head> <meta charset="UTF-8"> <title>Number Game< ...

Facing issues with building Angular 7 and Ionic 4 - getting error message "TypeError: Cannot read properties of undefined (reading 'kind')"

I need assistance with a problem I am encountering while building my Angular 7 & Ionic 4 application... When I run the ng build --prod command, I encounter the following error: ERROR in ./node_modules/ionic4-auto-complete/fesm5/ionic4-auto-complete.js ...

Breaking down an array in JavaScript using a variable as the index position

As far as I know, JavaScript arrays can be deconstructed based on a specific index by using the following method. const { 3: selectedByIndex } = arr; This code snippet assigns the value of the element at index 3 to the variable selectedByIndex. But is th ...

In Node.js, JavaScript, when using SQLite, the variables are inserted as Null

I have spent a lot of time searching and trying various methods, but I am still unable to solve this issue. My goal is to insert 8 variables received from an API call into an SQLite table. Although the execution seems correct, when I query the table, all v ...

Customizing the returned data in Jquery autocomplete

I have the following code snippet: $(document).ready(function () { if ($('#au').length <= 0) { return; } var $project = $('#au'); $project.autocomplete({ minLength: 4, source: function (reque ...

Tips for simultaneously submitting two forms or merging them into a single form

Trying to merge two different forms into one has proven to be quite challenging for me. The recommendation I received was to move the create method from ChargesController to OrderController, but it's not as simple as that. The Charges Form requires j ...

What is the reason for node-sass being rebuilt after upgrading from npm6 to npm7?

My application utilizes sass opposed to node-sass. Within my package-lock.json file, there is no mention of node-sass. I have been successfully using npm 6 for years without any issues. However, upon attempting to run npm install with npm 7, I encounter ...

Utilizing HTML and Javascript for streaming audio and recording voice

Working on a new project that involves streaming audio files (mp3) and recording voice messages. Initially considered using Flash, but the challenge is making the website iPhone-friendly as per the client's request. Is there a technology available th ...

Timing of Vue mounting and initialization phases

I am currently working on a component where I pass the reference to an internal element to the parent using defineExpose. In this example, I simply log the element, but in my actual project, I intend to manipulate it. SFC Playground // Comp.vue <scrip ...

Storing an Excel file with JavaScript: A comprehensive guide

I've been struggling to save an Excel file using Javascript, but I'm facing compatibility issues with different browsers. I initially tried using BASE64 along with data URL, which worked well in Chrome and Firefox but failed in IE and Safari. ne ...