43 sec in total
273 ms
32.5 sec
10.2 sec
Visit blackbookonline.info now to see the best up-to-date Black Book Online content for United States and also check out these interesting facts you probably never knew about blackbookonline.info
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Visit blackbookonline.infoWe analyzed Blackbookonline.info page load time and found that the first response time was 273 ms and then it took 42.7 sec to load all DOM resources and completely render a web page. This is an excellent result, as only a small number of websites can load faster.
blackbookonline.info performance score
name
value
score
weighting
Value3.9 s
25/100
10%
Value6.0 s
13/100
25%
Value8.3 s
19/100
10%
Value4,070 ms
1/100
30%
Value0.059
98/100
15%
Value16.9 s
5/100
10%
273 ms
1772 ms
189 ms
1807 ms
1675 ms
Our browser made a total of 64 requests to load all elements on the main page. We found that 33% of them (21 requests) were addressed to the original Blackbookonline.info, 20% (13 requests) were made to Apis.google.com and 13% (8 requests) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (6.8 sec) relates to the external source Apis.google.com.
Page size can be reduced by 979.4 kB (61%)
1.6 MB
635.9 kB
In fact, the total size of Blackbookonline.info main page is 1.6 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. 75% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Javascripts take 1.2 MB which makes up the majority of the site volume.
Potential reduce by 69.6 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 25.5 kB, which is 31% 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 69.6 kB or 84% of the original size.
Potential reduce by 6.7 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. Black Book Online images are well optimized though.
Potential reduce by 720.1 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 720.1 kB or 59% of the original size.
Potential reduce by 183.1 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. Blackbookonline.info needs all CSS files to be minified and compressed as it can save up to 183.1 kB or 82% of the original size.
Number of requests can be reduced by 33 (62%)
53
20
The browser has sent 53 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Black Book Online. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 26 to 1 for JavaScripts and from 9 to 1 for CSS and as a result speed up the page load time.
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blackbookonline.info 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
blackbookonline.info 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
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
Page has valid source maps
blackbookonline.info SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Links are not crawlable
Mobile Friendly
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/).
Impact
Issue
Document doesn't use legible font sizes
N/A
N/A
ISO-8859-1
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Blackbookonline.info can be misinterpreted by Google and other search engines. Unfortunately we cannot identify language used on the page (probably there is a mix of languages, too little text or something else) and no language is claimed in <html> or <meta> tags either. Our system also found out that Blackbookonline.info 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.
{{og_description}}
blackbookonline.info
Open Graph description is not detected on the main page of Black Book Online. 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: