49.1 sec in total
1.6 sec
47.2 sec
282 ms
Visit lab-spectrum.com now to see the best up-to-date Lab Spectrum content and also check out these interesting facts you probably never knew about lab-spectrum.com
上海谱元仪器有限公司是专供分光光度计、紫外分光光度计、可见分光光度计及紫外可见分光光度计等实验室仪器设备供应商,电话:021-67766136。
Visit lab-spectrum.comWe analyzed Lab-spectrum.com page load time and found that the first response time was 1.6 sec and then it took 47.5 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. Unfortunately, there were 26 request timeouts, which can generally increase the web page load time, as the browser stays idle while waiting for website response.
lab-spectrum.com performance score
name
value
score
weighting
Value4.4 s
16/100
10%
Value10.8 s
0/100
25%
Value10.6 s
7/100
10%
Value10 ms
100/100
30%
Value0.465
19/100
15%
Value8.9 s
35/100
10%
1592 ms
12423 ms
4296 ms
6002 ms
1069 ms
Our browser made a total of 91 requests to load all elements on the main page. We found that 73% of them (66 requests) were addressed to the original Lab-spectrum.com, 13% (12 requests) were made to Skin.54kefu.net and 3% (3 requests) were made to Bdimg.share.baidu.com. The less responsive or slowest element that took the longest time to load (20.3 sec) belongs to the original domain Lab-spectrum.com.
Page size can be reduced by 137.1 kB (51%)
269.4 kB
132.3 kB
In fact, the total size of Lab-spectrum.com main page is 269.4 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. 15% of websites need less resources to load. Javascripts take 125.1 kB which makes up the majority of the site volume.
Potential reduce by 46.9 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. 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 46.9 kB or 83% of the original size.
Potential reduce by 1.4 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. Lab Spectrum images are well optimized though.
Potential reduce by 82.1 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 82.1 kB or 66% of the original size.
Potential reduce by 6.6 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. Lab-spectrum.com needs all CSS files to be minified and compressed as it can save up to 6.6 kB or 72% of the original size.
Number of requests can be reduced by 35 (56%)
62
27
The browser has sent 62 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Lab Spectrum. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 15 to 1 for JavaScripts and from 9 to 1 for CSS and as a result speed up the page load time.
lab-spectrum.com
1592 ms
www.lab-spectrum.com
12423 ms
common.css
4296 ms
base.js
6002 ms
common.js
1069 ms
form.js
3424 ms
blockui.js
3660 ms
A.css
1583 ms
advsheadlb.css
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advsheadlb.js
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searchform.js
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searchform_dolphin.css
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newslist_time.css
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productlist_roll.css
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productlist_roll.js
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productclass_dolphin.css
3409 ms
541333.js
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searchr.gif
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more.gif
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arrow.gif
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stat.php
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stat.htm
250 ms
core.php
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pic1.gif
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getonline
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url.js
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arrow.gif
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app.gif
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dot2.gif
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skin.css
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top.gif
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btn_2.gif
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btn_1.gif
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bg.gif
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top.png
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l.gif
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shell_v2.js
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bg.gif
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logger.js
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bds_s_v2.js
5529 ms
lab-spectrum.com accessibility score
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
Tables and lists
These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.
Impact
Issue
<dl>'s do not contain only properly-ordered <dt> and <dd> groups, <script>, <template> or <div> elements.
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
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
Image elements do not have [alt] attributes
Links do not have a discernible name
Best practices
These items highlight common accessibility best practices.
Impact
Issue
[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.
lab-spectrum.com 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
lab-spectrum.com SEO score
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Image elements do not have [alt] attributes
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
Tap targets are not sized appropriately
ZH
N/A
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Lab-spectrum.com can be misinterpreted by Google and other search engines. Our service has detected that Chinese 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 Lab-spectrum.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.
lab-spectrum.com
Open Graph description is not detected on the main page of Lab Spectrum. 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: