29.1 sec in total
1.7 sec
27.1 sec
210 ms
Click here to check amazing 51 Pass content. Otherwise, check out these important facts you probably never knew about 51-pass.com
51-pass幫助您輕鬆學習并順利通過a+,security+,Linux+,oca,ocp,scjp,vcp,pmp,cisa,rhce等眾多IT認證,品質保證!
Visit 51-pass.comWe analyzed 51-pass.com page load time and found that the first response time was 1.7 sec and then it took 27.4 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 was 1 request timeout, which can generally increase the web page load time, as the browser stays idle while waiting for website response.
51-pass.com performance score
name
value
score
weighting
Value4.9 s
11/100
10%
Value7.5 s
4/100
25%
Value12.6 s
3/100
10%
Value60 ms
100/100
30%
Value0.009
100/100
15%
Value6.0 s
64/100
10%
1701 ms
748 ms
519 ms
1276 ms
770 ms
Our browser made a total of 58 requests to load all elements on the main page. We found that 74% of them (43 requests) were addressed to the original 51-pass.com, 12% (7 requests) were made to Www1.53kf.com and 3% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (20.3 sec) relates to the external source W1.killtest.net.
Page size can be reduced by 195.3 kB (50%)
394.5 kB
199.2 kB
In fact, the total size of 51-pass.com main page is 394.5 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. 20% of websites need less resources to load. Javascripts take 220.8 kB which makes up the majority of the site volume.
Potential reduce by 35.1 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 8.3 kB, which is 18% 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 35.1 kB or 78% of the original size.
Potential reduce by 2.2 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. 51 Pass images are well optimized though.
Potential reduce by 141.8 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 141.8 kB or 64% of the original size.
Potential reduce by 16.3 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. 51-pass.com needs all CSS files to be minified and compressed as it can save up to 16.3 kB or 75% of the original size.
Number of requests can be reduced by 22 (40%)
55
33
The browser has sent 55 CSS, Javascripts, AJAX and image requests in order to completely render the main page of 51 Pass. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 12 to 1 for JavaScripts and as a result speed up the page load time.
www.51-pass.com
1701 ms
main.css
748 ms
index.css
519 ms
jquery.js
1276 ms
tooltip.js
770 ms
dialog.js
514 ms
global.js
773 ms
aside.css
532 ms
aside.js
772 ms
slidePlayer.js
283 ms
tongji.js
715 ms
tj.js
20290 ms
ga.js
34 ms
down1.gif
255 ms
livechat.gif
255 ms
e_icon1.gif
251 ms
qq.gif
252 ms
kf.gif
257 ms
VCode.aspx
380 ms
83ceb95626764f27a682c78cac01dac2.jpg
998 ms
hot_title.gif
502 ms
whychoose_t.jpg
504 ms
kcompay.gif
503 ms
macfee.aspx
505 ms
logo.gif
609 ms
searchbtn.jpg
745 ms
checkoutbtn.jpg
752 ms
carttip.gif
755 ms
nav_bg.jpg
755 ms
navbgline.gif
868 ms
__utm.gif
44 ms
aside_bg_over.jpg
942 ms
list_02.jpg
963 ms
list_01.gif
973 ms
aside_more.gif
962 ms
bg_up.gif
1074 ms
w123.gif
1159 ms
bg_down.gif
1185 ms
inp-story.gif
1207 ms
w1h39.png
1209 ms
hotcert_tbg.gif
1188 ms
whychoose_b.jpg
1293 ms
whychoose_bg.gif
1371 ms
w_c1.jpg
1394 ms
w_c2.jpg
1421 ms
w_c3.jpg
1421 ms
w_c4.gif
1444 ms
tongji.do
879 ms
kf.php
1514 ms
kf.php
7901 ms
sendacc.jsp
2531 ms
kf_new.php
6419 ms
kf_ivt_new.php
2288 ms
zdytb_53kf_1318401718.jpg
3311 ms
ivt_tw.gif
545 ms
fu-button1_tw.gif
451 ms
fu-button2_tw.gif
2254 ms
jquery-1.4.2.flp.js
2395 ms
51-pass.com accessibility score
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
51-pass.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
User Experience
Impact
Issue
Displays images with incorrect aspect ratio
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
Issues were logged in the Issues panel in Chrome Devtools
51-pass.com SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Links are not crawlable
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
ZH
N/A
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise 51-pass.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 51-pass.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.
51-pass.com
Open Graph description is not detected on the main page of 51 Pass. 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: