1.3 sec in total
96 ms
1 sec
157 ms
Click here to check amazing Physics NIST content for United States. Otherwise, check out these important facts you probably never knew about physics.nist.gov
PML is a world leader in the science of measurement. We determine the definitive methods for nearly every kind of measurement employed in commerce and research, provide NIST-traceable calibrations, an...
Visit physics.nist.govWe analyzed Physics.nist.gov page load time and found that the first response time was 96 ms and then it took 1.2 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 20% of websites can load faster.
physics.nist.gov performance score
name
value
score
weighting
Value3.7 s
29/100
10%
Value7.9 s
3/100
25%
Value4.0 s
81/100
10%
Value190 ms
91/100
30%
Value0.085
93/100
15%
Value6.1 s
63/100
10%
96 ms
483 ms
45 ms
85 ms
87 ms
Our browser made a total of 30 requests to load all elements on the main page. We found that 3% of them (1 request) were addressed to the original Physics.nist.gov, 87% (26 requests) were made to Nist.gov and 10% (3 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (483 ms) relates to the external source Nist.gov.
Page size can be reduced by 256.1 kB (29%)
879.8 kB
623.6 kB
In fact, the total size of Physics.nist.gov main page is 879.8 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. 25% of websites need less resources to load. Images take 536.8 kB which makes up the majority of the site volume.
Potential reduce by 24.5 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 24.5 kB or 75% of the original size.
Potential reduce by 19.4 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. Physics NIST images are well optimized though.
Potential reduce by 135.1 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 135.1 kB or 61% of the original size.
Potential reduce by 77.2 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. Physics.nist.gov needs all CSS files to be minified and compressed as it can save up to 77.2 kB or 86% of the original size.
Number of requests can be reduced by 14 (58%)
24
10
The browser has sent 24 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Physics NIST. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 7 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.
physics.nist.gov
96 ms
483 ms
nist-styles.css
45 ms
nist-subsite-overrides.css
85 ms
browser-all.js
87 ms
jquery-1.7.2.min.js
134 ms
nist-exit-script.js
86 ms
federated-analytics.all.min.js
87 ms
foresee-trigger.js
148 ms
commonspot.css
124 ms
always-include-common.js
126 ms
always-include-ie.js
127 ms
jquery.cycle.all.min.js
128 ms
jqbanner.css
164 ms
ga.js
54 ms
NIST_logo.gif
74 ms
pml.jpg
84 ms
columnsbackground.gif
76 ms
separation_dots.gif
76 ms
PML-logo_250.png
85 ms
Breast_Phantom-400x324.png
254 ms
QuantumThermometer-400x324_1.png
181 ms
2016-02-26-Squeezing-BlochSphere-400x324.png
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OrganicTransistors-400x324.png
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govdelivery_bubble.gif
124 ms
FunctionPro-Medium-webfont.woff
144 ms
foresee-surveydef.js
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__utm.gif
27 ms
__utm.gif
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foresee-dhtml.css
45 ms
physics.nist.gov 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
Image elements do not have [alt] attributes
Links do not have a discernible name
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
Lists do not contain only <li> elements and script supporting elements (<script> and <template>).
physics.nist.gov 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
Detected JavaScript libraries
Browser errors were logged to the console
physics.nist.gov 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
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 Physics.nist.gov 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 Physics.nist.gov 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.
physics.nist.gov
Open Graph description is not detected on the main page of Physics NIST. 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: