Access davance.com. DA'VANCE - สถาบันกวดวิชาดาว้องก์ สอนวิชาภาษาไทยและสังคม

name

value

score

weighting

FCP (First Contentful Paint)

Value11.5 s

0/100

10%

LCP (Largest Contentful Paint)

Value30.3 s

0/100

25%

SI (Speed Index)

Value39.0 s

0/100

10%

TBT (Total Blocking Time)

Value1,460 ms

14/100

30%

CLS (Cumulative Layout Shift)

Value0.827

4/100

15%

TTI (Time to Interactive)

Value29.3 s

0/100

10%

davance.com

806 ms

davance.com

7418 ms

cwc.js

1014 ms

rYMi7VXTd5Xvzbbw4XjB2KsW

1055 ms

css

40 ms

Our browser made a total of 82 requests to load all elements on the main page. We found that 39% of them (32 requests) were addressed to the original Davance.com, 29% (24 requests) were made to Cdnjs.cloudflare.com and 7% (6 requests) were made to Fonts.googleapis.com. The less responsive or slowest element that took the longest time to load (20.1 sec) belongs to the original domain Davance.com.

Content Size

1.0 MB

After Optimization

695.3 kB

In fact, the total size of Davance.com main page is 1.0 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 60% of websites need less resources to load. Javascripts take 533.5 kB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 125.9 kB

Original 150.0 kB
After minification 133.4 kB
After compression 24.1 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. This page needs HTML code to be minified as it can gain 16.7 kB, which is 11% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 125.9 kB or 84% of the original size.

Image Optimization

-12%

Potential reduce by 33.6 kB

Original 283.0 kB
After minification 249.4 kB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Obviously, DA VANCE needs image optimization as it can save up to 33.6 kB or 12% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-28%

Potential reduce by 148.9 kB

Original 533.5 kB
After minification 532.2 kB
After compression 384.6 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 148.9 kB or 28% of the original size.

CSS Optimization

-22%

Potential reduce by 10.7 kB

Original 47.8 kB
After minification 47.5 kB
After compression 37.1 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Davance.com needs all CSS files to be minified and compressed as it can save up to 10.7 kB or 22% of the original size.

Requests Now

After Optimization

The browser has sent 73 CSS, Javascripts, AJAX and image requests in order to completely render the main page of DA VANCE. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 33 to 1 for JavaScripts and from 18 to 1 for CSS and as a result speed up the page load time.

Accessibility Issues

These are opportunities to improve the legibility of your content.

High

Background and foreground colors do not have a sufficient contrast ratio.

These are opportunities to improve the interpretation of your content by users in different locales.

High

<html> element does not have a [lang] attribute

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

These items highlight common accessibility best practices.

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Areas of Improvement

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

Search Engine Optimization Advices

To appear in search results, crawlers need access to your app.

High

Links are not crawlable

Format your HTML in a way that enables crawlers to better understand your app’s content.

High

Image elements do not have [alt] attributes

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

Language Detected

TH
Language Claimed

N/A
Encoding

UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Davance.com can be misinterpreted by Google and other search engines. Our service has detected that Thai is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Davance.com main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

davance.com

Open Graph data is detected on the main page of DA VANCE. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook:

Report Summary

Performance

Accessibility

Best Practices

SEO

DA'VANCE - สถาบันกวดวิชาดาว้องก์ สอนวิชาภาษาไทยและสังคม

Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)

Network Requests Diagram

davance.com

davance.com

cwc.js

rYMi7VXTd5Xvzbbw4XjB2KsW

css

Page Optimization Overview & Recommendations

Content Size

After Optimization

HTML Optimization

Image Optimization

JavaScript Optimization

CSS Optimization

Requests Breakdown

Requests Now

After Optimization

Network Requests Diagram

davance.com

davance.com

cwc.js

rYMi7VXTd5Xvzbbw4XjB2KsW

css

css

css

css

css

font-awesome.min.css

reset.min.css

animate.css

styles.min.css

bootstrap.min.css

toastr.min.css

bootstrap-select.min.css

bootstrap-datepicker.min.css

style.css

owl.carousel.min.css

owl.theme.default.min.css

modernizr-custom.min.js

api.js

gtm.js

js

analytics.js

hotjar-3692729.js

collect

collect

modules.1a30a0a67c3c23c13060.js

ga-audiences

jquery.min.js

bootstrap.min.js

bootstrap-select.min.js

jquery.matchHeight-min.js

jquery.form.min.js

toastr.min.js

moment.min.js

jquery.waypoints.min.js

mustache.min.js

jquery.qrcode.min.js

JsBarcode.code128.min.js

jquery-ui.min.js

jquery.ui.touch-punch.min.js