987 ms in total
77 ms
849 ms
61 ms
Welcome to zdoubleb.com homepage info - get ready to check Z Double B best content right away, or after learning these important things about zdoubleb.com
Z Double B Inc. is a full-service window replacement, siding, and door installation company in Lakewood, CO serving clients in the Denver Metro area since 2013.
Visit zdoubleb.comWe analyzed Zdoubleb.com page load time and found that the first response time was 77 ms and then it took 910 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 15% of websites can load faster.
zdoubleb.com performance score
name
value
score
weighting
Value2.1 s
81/100
10%
Value5.4 s
21/100
25%
Value10.5 s
8/100
10%
Value2,060 ms
7/100
30%
Value0
100/100
15%
Value19.2 s
2/100
10%
77 ms
43 ms
39 ms
30 ms
152 ms
Our browser made a total of 49 requests to load all elements on the main page. We found that 2% of them (1 request) were addressed to the original Zdoubleb.com, 33% (16 requests) were made to Static.parastorage.com and 24% (12 requests) were made to Static.wixstatic.com. The less responsive or slowest element that took the longest time to load (537 ms) relates to the external source Static.wixstatic.com.
Page size can be reduced by 479.2 kB (53%)
906.1 kB
426.9 kB
In fact, the total size of Zdoubleb.com main page is 906.1 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. 40% of websites need less resources to load. HTML takes 563.7 kB which makes up the majority of the site volume.
Potential reduce by 442.6 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. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 442.6 kB or 79% of the original size.
Potential reduce by 33.8 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, Z Double B needs image optimization as it can save up to 33.8 kB or 30% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.
Potential reduce by 2.8 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. This website has mostly compressed JavaScripts.
Number of requests can be reduced by 13 (41%)
32
19
The browser has sent 32 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Z Double B. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 14 to 1 for JavaScripts and as a result speed up the page load time.
www.zdoubleb.com
77 ms
minified.js
43 ms
focus-within-polyfill.js
39 ms
polyfill.min.js
30 ms
js
152 ms
thunderbolt-commons.24e46262.bundle.min.js
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main.8752ee81.bundle.min.js
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lodash.min.js
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react.production.min.js
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react-dom.production.min.js
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siteTags.bundle.min.js
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wix-perf-measure.umd.min.js
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ZB2%20logo%20_png.png
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bundle.min.js
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deprecation-style.v5.css
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right-arrow.svg
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zdoubleb.com accessibility score
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
Buttons do not have an accessible name
Links do not have a discernible name
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
Navigation
These are opportunities to improve keyboard navigation in your application.
Impact
Issue
Heading elements are not in a sequentially-descending order
zdoubleb.com best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
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
zdoubleb.com SEO score
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 uses legible font sizes
Tap targets are not sized appropriately
EN
EN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Zdoubleb.com can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Zdoubleb.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.
zdoubleb.com
Open Graph data is detected on the main page of Z Double B. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: