Fftw.org FFTW Home Page

A fast, free C FFT library; includes real-complex, multidimensional, and parallel transforms. Benchmarked against many other FFTs.

Fftw.org Overview

Out of 100

Optimization 77

User Experience 100

FFTW, an acronym for "Fastest Fourier Transform in the West," is an open-source C library designed to optimize the execution of the discrete Fourier transform (DFT). The home page of the FFTW website is, as one might expect, primarily focused on promoting and discussing the features and benefits of the FFTW library in various contexts.

The site features a prominent header, which includes a series of links that direct users to various pages of the site, including a guide to installing and using the FFTW library, documentation, different support options, downloads and a FAQ section that can be of assistance for both new and seasoned users. The content is responsive on various devices, and the pages are well structured, making it easy for users to navigate and find the information they need.

The website also has a section where users can donate to support the project. The donation is flexible; therefore, users can donate any amount that they feel comfortable contributing.

The home page of the FFTW site provides various useful resources, including a download link to obtain the library, a Benchmarks page that compares the performance of the library against other similar FFTs on various platforms, and a Developer page that includes an API for the library and other development tools and resources.

In terms of its visual design, the website is straightforward, with a predominantly white background and black text, which makes it easy to read. The accurate use of visuals that brings out an elegant and modern look is well used by the website.

Furthermore, the site seems to be family-friendly as there is no inappropriate content or activities geared towards minors. The website's homepage is informative and efficiently designed, making it an excellent resource for anyone looking to implement FFTs into their work.

Finally, based on the PageSpeed Insights, the FFTW site scores an impressive 87 out of 100 for speed and 77 out of 100 for optimization, which indicates that the site is well optimized and can quickly load on most devices. This result indicates that the website's developers have put in much effort to provide users with a fast and streamlined experience. This high PageSpeed Insight score is a win for the site as user experience is also a significant factor in website optimization.

Fftw.org Rank Summary

Global Rank

469,540

Average Load Time

0.31sec

Links In Count

825

Website Value

$17,538

Audience Geography. Where are fftw.org visitors located?

Country	Visitors

Country	Pageviews

Country	Rank

Where do visitors go on fftw.org?

Subdomain	Pageviews
fftw.org	100%

Subdomain	Pageviews per User
fftw.org	1

Subdomain	Reach
fftw.org	100%

How popular is fftw.org?

Period	Global Rank	Global Rank Delta
past 3 months	469540	96470
past month	2195657	1820580
past week	1402586	0

Days	Pageviews Rank	Pageviews Rank Delta	Pageviews per Million	Pageviews per Million Delta	Pageviews per User	Pageviews per User Delta
90	661255	205780	5	-35.27%	2	-25.62%
30	2445924	1813469	1	-88.115%	1	40%
7	1614985	0	1	0%	1	0%

Days	Reach Rank	Reach Rank Delta	Reach per Million	Reach per Million Delta
90	417919	55817	1	-12.82%
30	2110636	1818710	2	-91.474%
7	1304171	0	4	0%

Fftw.org Website Safety

Overview

Last Updated: 11/22/2024

Overall result - fftw.org is safe.

We gather website safety and reputation data and compare it with available third-party sources so we calculate own safety and trustworthiness rate based on information that we get.

Norton Connect Safe

Last Updated: 03/29/2024

fftw.org is safe.

Norton ConnectSafe evaluates fftw.org for any unsafe and insecure content. The results are critical for families with young children.

Google Safe Search

Last Updated: 03/15/2019

fftw.org is safe.

SafeSearch is used as a parental control tool to filter out any inappropriate for your children search results on your devices: phones, tablets or personal computers.

Google Safe Browsing

Last Updated: 01/09/2019

fftw.org is safe.
Malware: not found.
Phishing: not detected.
Unwanted software: not found.
Harmfull applications: not found.

Google Safe Browsing notifies when websites are compromised by malicious actors. These protections work across Google products and provide a safer online experience.

Site Advisor

Last Updated: 02/28/2021

fftw.org is safe.

McAfee assesses fftw.org for a meaningful set of security threats. Featured dangers from annoying pop-ups to hidden Trojans, that can steal your identity, will be revealed. McAfee does not analyze fftw.org for mature or inappropriate content, only security checks are evaluated.

Web of Trust

Last Updated: 01/10/2019

fftw.org child safety is very good.

The WOT calculates reputation of the fftw.org. This reputation system receives ratings from users and information from third-party sources, assesses the fftw.org for safety features and confirms, whether fftw.org is suitable for children.

SSL Information

SSL Checker Tool

Domain	fftw.org
Issuer Organization	Let's Encrypt
Issuer	R11
Algorithm	RSA-SHA256
Valid form	06/25/2024
Expiration	09/23/2024
Signed	Certificate is not self signed
Additional Domains	fftw.org imap.fftw.org mail.fftw.org smtp.fftw.org www.fftw.org

Fftw.org Rank History

Alexa Rank shows how popular fftw.org is in comparison with other sites. The most popular site has Alexa Rank equals 1. If fftw.org has Alexa Rank equals 100,000, then it is in TOP 100,000 popular sites in the world. The rank is calculated using a combination of average daily visitors to fftw.org and pageviews on fftw.org over the past 3 months.

Fftw.org Hosting Information

Server Location

Geolocation Tool

ASN Information

ASN Lookup Tool

ASN ID: 55293

ASN Title: A2HOSTING - A2 Hosting, Inc., US

Last Update: 10/28/2024

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ASNumber: 55293
ASName: A2HOSTING
ASHandle: AS55293
RegDate: 2013-05-17
Updated: 2013-05-17
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OrgName: A2 Hosting, Inc.
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Address: P.O. Box 2998
City: Ann Arbor
StateProv: MI
PostalCode: 48106
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Updated: 2017-06-06
Comment: http://www.a2hosting.com
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OrgTechHandle: CUNDI1-ARIN
OrgTechName: Cundiff, David
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OrgTechEmail: dcundiff@a2hosting.com
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Fftw.org Domain Registration and Settings

WHOIS

WHOIS Lookup Tool

Domain Name: fftw.org
Registry Domain ID: e015789ba4494fd5bced20561b8ec623-LROR
Registrar WHOIS Server: http://whois.dotEarth.com
Registrar URL: http://www.dotEarth.com
Updated Date: 2019-12-18T13:18:12Z
Creation Date: 1999-06-07T19:29:50Z
Registry Expiry Date: 2029-06-07T19:30:27Z
Registrar: Domain Registration Services, Inc. dba dotEarth.com
Registrar IANA ID: 64
Registrar Abuse Contact Email: abuse@dotEarth.com
Registrar Abuse Contact Phone: +1.8882673130
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Registry Registrant ID: REDACTED FOR PRIVACY
Registrant Name: REDACTED FOR PRIVACY
Registrant Organization: FFTW
Registrant Street: REDACTED FOR PRIVACY
Registrant City: REDACTED FOR PRIVACY
Registrant State/Province: MA
Registrant Postal Code: REDACTED FOR PRIVACY
Registrant Country: US
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Tech Email: Please query the RDDS service of the Registrar of Record identified in this output for information on how to contact the Registrant, Admin, or Tech contact of the queried domain name.
Name Server: ns2.afraid.org
Name Server: ns.fftw.org
Name Server: puck.nether.net
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of WHOIS database: 2024-11-10T21:58:22Z

DNS Records

DNS Lookup Tool

Host	A Record	TTL

Host	MX Record	Priority	TTL

Host	NS Record	TTL

Host	TXT Record	TTL

Fftw.org HTML Check

HTML Validation Tool

Errors

Obsolete doctype. Expected “<!DOCTYPE html>”.

Bad value “Bookmark” for attribute “rel” on element “link”: The string “Bookmark” is not a registered keyword.

The “text” attribute on the “body” element is obsolete. Use CSS instead.

The “bgcolor” attribute on the “body” element is obsolete. Use CSS instead.

The “align” attribute on the “p” element is obsolete. Use CSS instead.

An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.

The “align” attribute on the “div” element is obsolete. Use CSS instead.

The “cellspacing” attribute on the “table” element is obsolete. Use CSS instead.

The “cellpadding” attribute on the “table” element is obsolete. Use CSS instead.

The “align” attribute on the “img” element is obsolete. Use CSS instead.

Warnings

The “name” attribute is obsolete. Consider putting an “id” attribute on the nearest container instead.

This document appears to be written in English. Consider adding “lang="en"” (or variant) to the “html” start tag.

Fftw.org Desktop Performance

Last tested: 06/19/2019

Desktop Speed

92%

Optimize images

Eliminate render-blocking JavaScript and CSS in above-the-fold content

Leverage browser caching

Enable compression

Minify CSS

Desktop Resource Breakdown

Total Resources	4
Number of Hosts	1
Static Resources	3
CSS Resources	1

Fftw.org Mobile Insights

Last tested: 05/17/2017

Mobile Usability

66%

Use legible font sizes

Configure the viewport

Size tap targets appropriately

Mobile Speed

87%

Eliminate render-blocking JavaScript and CSS in above-the-fold content

Optimize images

Leverage browser caching

Mobile Resource Breakdown

Total Resources	4
Number of Hosts	1
Static Resources	3
CSS Resources	1

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Fftw.org FFTW Home Page

A fast, free C FFT library; includes real-complex, multidimensional, and parallel transforms. Benchmarked against many other FFTs.

Fftw.org Overview

Fftw.org Rank Summary

Fftw.org Website Safety

Fftw.org Rank History

Fftw.org Hosting Information

Fftw.org Domain Registration and Settings

Fftw.org HTML Check

Fftw.org Desktop Performance

Fftw.org Mobile Insights

Fftw.org Similar Audits

Fftw.org Common Typos