1.5 sec in total
384 ms
974 ms
114 ms
Click here to check amazing SLF4J content for China. Otherwise, check out these important facts you probably never knew about slf4j.org
Visit slf4j.orgWe analyzed Slf4j.org page load time and found that the first response time was 384 ms and then it took 1.1 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 20% of websites can load faster.
slf4j.org performance score
name
value
score
weighting
Value3.5 s
35/100
10%
Value3.6 s
62/100
25%
Value6.0 s
47/100
10%
Value2,130 ms
6/100
30%
Value0.01
100/100
15%
Value9.9 s
27/100
10%
384 ms
97 ms
188 ms
193 ms
202 ms
Our browser made a total of 8 requests to load all elements on the main page. We found that 88% of them (7 requests) were addressed to the original Slf4j.org, 13% (1 request) were made to Api.travis-ci.org. The less responsive or slowest element that took the longest time to load (384 ms) belongs to the original domain Slf4j.org.
Page size can be reduced by 32.6 kB (45%)
71.9 kB
39.3 kB
In fact, the total size of Slf4j.org main page is 71.9 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. Only 5% of websites need less resources to load. Images take 49.1 kB which makes up the majority of the site volume.
Potential reduce by 6.9 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 1.2 kB, which is 12% 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 6.9 kB or 70% of the original size.
Potential reduce by 15.5 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, SLF4J needs image optimization as it can save up to 15.5 kB or 32% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.
Potential reduce by 3.0 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 3.0 kB or 73% of the original size.
Potential reduce by 7.1 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. Slf4j.org needs all CSS files to be minified and compressed as it can save up to 7.1 kB or 81% of the original size.
We found no issues to fix!
7
7
The browser has sent 7 CSS, Javascripts, AJAX and image requests in order to completely render the main page of SLF4J. According to our analytics all requests are already optimized.
slf4j.org
384 ms
site.css
97 ms
header.js
188 ms
left.js
193 ms
footer.js
202 ms
slf4j-logo.jpg
188 ms
follow_us.png
211 ms
slf4j.svg
355 ms
slf4j.org accessibility score
ARIA
These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.
Impact
Issue
[aria-*] attributes do not match their roles
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
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
<frame> or <iframe> elements do not have a title
Links do not have a discernible name
Internationalization and localization
These are opportunities to improve the interpretation of your content by users in different locales.
Impact
Issue
<html> element does not have a [lang] attribute
slf4j.org best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Includes front-end JavaScript libraries with known security vulnerabilities
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
slf4j.org SEO score
EN
N/A
ISO-8859-1
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Slf4j.org can be misinterpreted by Google and other search engines. Our service has detected that English 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 Slf4j.org main page’s claimed encoding is iso-8859-1. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.
slf4j.org
Open Graph description is not detected on the main page of SLF4J. 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: