1.5 sec in total
134 ms
1.1 sec
301 ms
Welcome to spiedigitallibrary.org homepage info - get ready to check Spiedigitallibrary best content for China right away, or after learning these important things about spiedigitallibrary.org
Search the SPIE Digital Library, the world's largest collection of optics and photonics peer-reviewed applied research. Subscriptions and Open Access content available.
Visit spiedigitallibrary.orgWe analyzed Spiedigitallibrary.org page load time and found that the first response time was 134 ms and then it took 1.4 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 25% of websites can load faster.
spiedigitallibrary.org performance score
name
value
score
weighting
Value5.5 s
6/100
10%
Value6.5 s
9/100
25%
Value7.9 s
22/100
10%
Value1,690 ms
11/100
30%
Value0.01
100/100
15%
Value13.3 s
12/100
10%
134 ms
235 ms
18 ms
31 ms
20 ms
Our browser made a total of 49 requests to load all elements on the main page. We found that 88% of them (43 requests) were addressed to the original Spiedigitallibrary.org, 4% (2 requests) were made to Google-analytics.com and 4% (2 requests) were made to Datacoll.spie.org. The less responsive or slowest element that took the longest time to load (235 ms) relates to the external source Cdn.optimizely.com.
Page size can be reduced by 318.1 kB (70%)
457.1 kB
139.0 kB
In fact, the total size of Spiedigitallibrary.org main page is 457.1 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. 35% of websites need less resources to load. Javascripts take 259.6 kB which makes up the majority of the site volume.
Potential reduce by 97.7 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 15.5 kB, which is 12% 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 97.7 kB or 78% of the original size.
Potential reduce by 448 B
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, Spiedigitallibrary needs image optimization as it can save up to 448 B or 14% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.
Potential reduce by 164.5 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 164.5 kB or 63% of the original size.
Potential reduce by 55.4 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. Spiedigitallibrary.org needs all CSS files to be minified and compressed as it can save up to 55.4 kB or 79% of the original size.
Number of requests can be reduced by 16 (55%)
29
13
The browser has sent 29 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Spiedigitallibrary. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 13 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.
spiedigitallibrary.org
134 ms
1094514084.js
235 ms
18 ms
spiehome.less
31 ms
scm6.formValidation.css
20 ms
content.figure.css
13 ms
institutionalLogo.css
26 ms
jquery.min.js
31 ms
WebResource.axd
27 ms
signInDialogs.js
29 ms
WebResource.axd
27 ms
ScriptResource.axd
36 ms
ScriptResource.axd
71 ms
ScriptResource.axd
62 ms
scm6.index.js
42 ms
124 ms
webtrends.js
56 ms
200D9C_5_0.woff
21 ms
ga.js
34 ms
logo_SPIE_masthead.png
15 ms
DL_Home1.png
81 ms
DL_Home2.png
14 ms
DL_Home3.png
77 ms
DL_Home4.png
78 ms
DL_Home5.png
83 ms
Open%20Access.jpg
79 ms
AU-for%20DL.gif
80 ms
OFB-for%20DL.gif
80 ms
PM-for%20DL.gif
82 ms
SG-for%20DL.gif
83 ms
LD-for%20DL.gif
85 ms
img_coverplaceholder.gif
80 ms
arrow_open.gif
83 ms
counter_compliant.png
86 ms
citation_linking_graphic.png
84 ms
b_question.png
84 ms
sprite_globalHeader.png
78 ms
logo_SPIE_DL_masthead.png
80 ms
icon_search.png
80 ms
__utm.gif
24 ms
sprite_carousel_buttons.png
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gradient_carousel.png
22 ms
200D9C_3_0.woff
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200D9C_2_0.woff
43 ms
logo_SPIE_footer.png
34 ms
logo_silverchair_footer.png
32 ms
wtid.js
157 ms
b_resize.gif
27 ms
dcs.gif
153 ms
spiedigitallibrary.org 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 IDs are not unique
Navigation
These are opportunities to improve keyboard navigation in your application.
Impact
Issue
Heading elements are not in a sequentially-descending order
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
spiedigitallibrary.org 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
spiedigitallibrary.org 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
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
EN
N/A
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Spiedigitallibrary.org can be misinterpreted by Google and other search engines. Our service has detected that English 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 Spiedigitallibrary.org 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.
spiedigitallibrary.org
Open Graph data is detected on the main page of PARSED_DOMAIN, but there is no image specified in description. It would be a good idea for the website admin to select a nice image that can properly represent the website in Open Graph data, otherwise the first found image will be taken for this purpose and social media information block will look like this: