3.1 sec in total
1.5 sec
1.5 sec
124 ms
Click here to check amazing Jt Bf content. Otherwise, check out these important facts you probably never knew about jt-bf.com
苏州市博飞光学有限公司地处苏州吴中区姜庄工业园,从创业至今已有30多年的历史,是专业生产与各种光学仪器配套的光学零件及光学磨料的企业,公司所生产的棱镜、透镜、窗口等主要适用于测量仪器、照相机、显微镜、医疗仪器、军事等方面的各种光电产品。
Visit jt-bf.comWe analyzed Jt-bf.com page load time and found that the first response time was 1.5 sec and then it took 1.6 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 30% of websites can load faster.
jt-bf.com performance score
name
value
score
weighting
Value0.9 s
100/100
10%
Value0.9 s
100/100
25%
Value2.8 s
95/100
10%
Value0 ms
100/100
30%
Value0.019
100/100
15%
Value0.9 s
100/100
10%
1506 ms
Our browser made a total of 1 request to load all elements on the main page. We found that all of those requests were addressed to Jt-bf.com and no external sources were called. The less responsive or slowest element that took the longest time to load (1.5 sec) belongs to the original domain Jt-bf.com.
Page size can be reduced by 113 B (29%)
395 B
282 B
In fact, the total size of Jt-bf.com main page is 395 B. This result falls within the top 5000 of lightweight and thus fast loading web pages. Only a small number of websites need less resources to load. HTML takes 395 B which makes up the majority of the site volume.
Potential reduce by 113 B
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 113 B or 29% of the original size.
We found no issues to fix!
0
0
Besides the initial HTML request, no CSS, Javascripts, AJAX or image files were requested in the course of web page rendering.
jt-bf.com
1506 ms
jt-bf.com accessibility score
Navigation
These are opportunities to improve keyboard navigation in your application.
Impact
Issue
[id] attributes on active, focusable elements are not unique
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
Form elements do not have associated labels
Links do not have a discernible name
<object> elements do not have alternate text
jt-bf.com best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Serves images with low resolution
General
Impact
Issue
Browser errors were logged to the console
jt-bf.com SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Links are not crawlable
robots.txt is not valid
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
Document uses plugins
ZH
N/A
ISO-8859-1
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Jt-bf.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 Jt-bf.com 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.
jt-bf.com
Open Graph description is not detected on the main page of Jt Bf. 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: