Tools & Wizards About Us

Report Summary

  • 41

    Performance

    Renders faster than
    60% of other websites

  • 75

    Accessibility

    Visual factors better than
    that of 41% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 62

    SEO

    Google-friendlier than
    23% of websites

erlangga.co.id

The Official Corporate Website of Penerbit Erlangga

Page Load Speed

10.2 sec in total

First Response

860 ms

Resources Loaded

8.7 sec

Page Rendered

671 ms

About Website

Visit erlangga.co.id now to see the best up-to-date Erlangga content for Indonesia and also check out these interesting facts you probably never knew about erlangga.co.id

Buku pelajaran, buku panduan dan sumber informasi untuk siswa, guru, orang tua.

Visit erlangga.co.id

Key Findings

We analyzed Erlangga.co.id page load time and found that the first response time was 860 ms and then it took 9.4 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.

Performance Metrics

erlangga.co.id performance score

41

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value8.9 s

0/100

10%

LCP (Largest Contentful Paint)

Value34.6 s

0/100

25%

SI (Speed Index)

Value18.6 s

0/100

10%

TBT (Total Blocking Time)

Value190 ms

91/100

30%

CLS (Cumulative Layout Shift)

Value0.1

90/100

15%

TTI (Time to Interactive)

Value15.8 s

6/100

10%

Network Requests Diagram

erlangga.co.id

860 ms

erlangga.co.id

1476 ms

js

61 ms

style.css

479 ms

modal.css

721 ms

Our browser made a total of 105 requests to load all elements on the main page. We found that 89% of them (93 requests) were addressed to the original Erlangga.co.id, 9% (9 requests) were made to Static.xx.fbcdn.net and 1% (1 request) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (3.2 sec) belongs to the original domain Erlangga.co.id.

Page Optimization Overview & Recommendations

Page size can be reduced by 747.5 kB (6%)

Content Size

11.7 MB

After Optimization

10.9 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Erlangga.co.id main page is 11.7 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. 55% of websites need less resources to load. Images take 11.3 MB which makes up the majority of the site volume.

HTML Optimization

-83%

Potential reduce by 48.9 kB

  • Original 58.8 kB
  • After minification 47.8 kB
  • After compression 9.8 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 11.0 kB, which is 19% 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 48.9 kB or 83% of the original size.

Image Optimization

-4%

Potential reduce by 434.0 kB

  • Original 11.3 MB
  • After minification 10.9 MB

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. Erlangga images are well optimized though.

JavaScript Optimization

-74%

Potential reduce by 105.3 kB

  • Original 142.3 kB
  • After minification 131.8 kB
  • After compression 37.0 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 105.3 kB or 74% of the original size.

CSS Optimization

-85%

Potential reduce by 159.2 kB

  • Original 187.3 kB
  • After minification 139.5 kB
  • After compression 28.1 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. Erlangga.co.id needs all CSS files to be minified and compressed as it can save up to 159.2 kB or 85% of the original size.

Requests Breakdown

Number of requests can be reduced by 42 (42%)

Requests Now

101

After Optimization

59

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 101 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Erlangga. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 17 to 1 for JavaScripts and from 18 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

erlangga.co.id accessibility score

75

Accessibility Issues

Names and labels

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.

Impact

Issue

High

<frame> or <iframe> elements do not have a title

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Best Practices

erlangga.co.id best practices score

58

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Displays images with incorrect aspect ratio

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

erlangga.co.id SEO score

62

Search Engine Optimization Advices

Crawling and Indexing

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

Impact

Issue

High

Links are not crawlable

Content Best Practices

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

Impact

Issue

High

Image elements do not have [alt] attributes

Language and Encoding

  • Language Detected

    ID

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Erlangga.co.id can be misinterpreted by Google and other search engines. Our service has detected that is used on the page, and it does not match the claimed English language. Our system also found out that Erlangga.co.id 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

Open Graph description is not detected on the main page of Erlangga. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: