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cfast.nist.gov: CFAST, Fire Growth and Smoke Transport Modeling | NIST

The Consolidated Model of Fire and Smoke Transport, CFAST, is a computer program that fire investigators, safety officials, engineers, ar

Page load speed analysis

  • 74/100

    Good result
  • 7

    Successful tests
  • 1

    Failed test
  • First response

    271 ms

  • Resources loaded

    860 ms

  • Page rendered

    163 ms

  • Total page load time

    1.3 sec

Visit cfast.nist.gov now to see the best up-to-date CFAST NIST content for United States and also check out these interesting facts you probably never knew about cfast.nist.gov

We analyzed Cfast.nist.gov page load time and found that the first response time was 271 ms and then it took 1 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 15% of websites can load faster.

Page optimization

  • HTML 139.5 kB
    Images 14.2 kB
    Javascripts 1.1 MB
    CSS 80.5 kB

    In fact, the total size of Cfast.nist.gov main page is 1.3 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 40% of websites need less resources to load. Javascripts take 1.1 MB which makes up the majority of the site volume.

    • Original 139.5 kB
    • After minification 138.7 kB
    • After compression 35.1 kB

    HTML optimization

    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 104.4 kB or 75% of the original size.

    • Original 14.2 kB

    Image optimization

    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. CFAST NIST images are well optimized though.

    • Original 1.1 MB
    • After minification 1.1 MB
    • After compression 355.0 kB

    JavaScript optimization

    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 713.2 kB or 67% of the original size.

    • Original 80.5 kB
    • After minification 68.2 kB
    • After compression 14.1 kB

    CSS optimization

    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. Cfast.nist.gov needs all CSS files to be minified and compressed as it can save up to 66.3 kB or 82% of the original size.

Network requests diagram

  • cfast.nist.gov
  • cfast.cfm
  • nist-styles.css
  • nist-subsite-overrides.css
  • browser-all.js
  • jquery-1.7.2.min.js
  • nist-exit-script.js
  • federated-analytics.all.min.js
  • foresee-trigger.js
  • commonspot.css
  • always-include-common.js
  • always-include-moz.js
  • element.js
  • addthis_widget.js
  • ga.js
  • lg-share-en.gif
  • NIST_logo.gif
  • el.jpg
  • govdelivery_bubble.gif
  • translateelement.css
  • main.js
  • __utm.gif
  • 300lo.json
  • __utm.gif
  • foresee-surveydef.js
  • sh.8e5f85691f9aaa082472a194.html
  • element_main.js
  • foresee-dhtml.css
  • layers.e5ea973510bf60b3db41.js

Our browser made a total of 29 requests to load all elements on the main page. We found that 3% of them (1 request) were addressed to the original Cfast.nist.gov, 55% (16 requests) were made to Nist.gov and 14% (4 requests) were made to S7.addthis.com. The less responsive or slowest element that took the longest time to load (271 ms) belongs to the original domain Cfast.nist.gov.

Additional info on cfast.nist.gov

Requests

The browser has sent 23 CSS, Javascripts, AJAX and image requests in order to completely render the main page of CFAST 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 12 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

12

Javascripts

6

Images

4

CSS

1

AJAX

23

All

Possible request optimization

1

Javascripts

6

Images

1

CSS

1

AJAX

14

Optimized

9

All

Normal result

Redirects

As for redirects, our browser was forwarded to http://www.nist.gov/el/fire_research/cfast.cfm before it reached this domain.

IP address

Cfast.nist.gov uses IP addresses which are currently shared with 1 other domain. The more sites share the same stack of IP addresses, the higher the host server’s workload is. It is strongly recommended that the host server should be changed or the hosting provider should be requested to give a different (separate) IP address for this domain.

Normal result

IP Trace

cfast.nist.gov

healthcare.nist.gov

34.225.12.161

cfast.nist.gov

52.2.35.151

DNS records

Type Host Target/ip TTL Other
A

dualstack.mc-58253-vpc-vpc-60971062.us-east-1.elb.amazonaws.com

52.2.35.151 60
A

dualstack.mc-58253-vpc-vpc-60971062.us-east-1.elb.amazonaws.com

34.225.12.161 60
CNAME

cfast.nist.gov

nistwww8.dualstack.migrate.acquia.com 300
AAAA

dualstack.mc-58253-vpc-vpc-60971062.us-east-1.elb.amazonaws.com

60 Ipv6: 2406:da00:ff00::3402:2397
AAAA

dualstack.mc-58253-vpc-vpc-60971062.us-east-1.elb.amazonaws.com

60 Ipv6: 2406:da00:ff00::22e1:ca1

Language and encoding

Good result

Language

EN en language flag

Detected

EN en language flag

Claimed

Encoding

UTF-8

Claimed

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Cfast.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 Cfast.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.

HTTPS certificate

SSL Certificate

Cfast.nist.gov has no SSL certificate. Web browsing can be safer with HTTPS connection, so we suggest that it should be obtained for this site.

Normal result

Visitor World Map

Country of origin for 36.3% of all visits is United States. It’s good for Cfast.nist.gov that their server is also located in United States, as that enables the majority of their visitors to benefit from a much faster page load time.

Good result

Poor result

Social Sharing Optimization

Open Graph description is not detected on the main page of CFAST 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:

cfast.nist.gov

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