Tools & Wizards About Us
primer3.sourceforge.net screenshot

Report Summary

  • 37

    Performance

    Renders faster than
    56% of other websites

  • 81

    Accessibility

    Visual factors better than
    that of 51% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 84

    SEO

    Google-friendlier than
    52% of websites

primer3.sourceforge.net

Primer3 - PCR primer design tool download | SourceForge.net

Page Load Speed

1.9 sec in total

First Response

29 ms

Resources Loaded

1.4 sec

Page Rendered

417 ms

primer3.sourceforge.net screenshot

About Website

Click here to check amazing Primer3 Source Forge content for China. Otherwise, check out these important facts you probably never knew about primer3.sourceforge.net

Download Primer3 - PCR primer design tool for free. Design PCR primers from DNA sequence. Widely used (190k Google hits for "primer3").

Visit primer3.sourceforge.net

Key Findings

We analyzed Primer3.sourceforge.net page load time and found that the first response time was 29 ms and then it took 1.8 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 40% of websites can load faster.

Performance Metrics

primer3.sourceforge.net performance score

37

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.9 s

25/100

10%

LCP (Largest Contentful Paint)

Value4.2 s

44/100

25%

SI (Speed Index)

Value6.5 s

39/100

10%

TBT (Total Blocking Time)

Value1,220 ms

20/100

30%

CLS (Cumulative Layout Shift)

Value0.109

87/100

15%

TTI (Time to Interactive)

Value16.6 s

5/100

10%

Network Requests Diagram

primer3.sourceforge.net

29 ms

225 ms

sf.sandiego-cmp-top.js

44 ms

cmp.css

48 ms

bizx-prebid.js

55 ms

Our browser made a total of 34 requests to load all elements on the main page. We found that 3% of them (1 request) were addressed to the original Primer3.sourceforge.net, 82% (28 requests) were made to A.fsdn.com and 6% (2 requests) were made to D.delivery.consentmanager.net. The less responsive or slowest element that took the longest time to load (779 ms) relates to the external source Cdn.consentmanager.net.

Page Optimization Overview & Recommendations

Page size can be reduced by 134.2 kB (22%)

Content Size

610.9 kB

After Optimization

476.7 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Primer3.sourceforge.net main page is 610.9 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. 55% of websites need less resources to load. Javascripts take 350.1 kB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 132.3 kB

  • Original 165.8 kB
  • After minification 165.5 kB
  • After compression 33.5 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 132.3 kB or 80% of the original size.

Image Optimization

-0%

Potential reduce by 0 B

  • Original 26.8 kB
  • After minification 26.8 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. Primer3 Source Forge images are well optimized though.

JavaScript Optimization

-1%

Potential reduce by 1.9 kB

  • Original 350.1 kB
  • After minification 350.1 kB
  • After compression 348.2 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. This website has mostly compressed JavaScripts.

CSS Optimization

-0%

Potential reduce by 28 B

  • Original 68.2 kB
  • After minification 68.2 kB
  • After compression 68.2 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. Primer3.sourceforge.net has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 17 (57%)

Requests Now

30

After Optimization

13

  • Images
  • JavaScript
  • CSS

The browser has sent 30 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Primer3 Source Forge. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 15 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

primer3.sourceforge.net

primer3.sourceforge.net

29 ms

225 ms

sf.sandiego-cmp-top.js

sf.sandiego-cmp-top.js

44 ms

cmp.css

cmp.css

48 ms

bizx-prebid.js

bizx-prebid.js

55 ms

lato.css

lato.css

52 ms

sandiego.css

sandiego.css

73 ms

disallow.css

disallow.css

53 ms

sf.sandiego-head.js

sf.sandiego-head.js

70 ms

adsbanner.js

adsbanner.js

70 ms

owl.carousel.min.js

owl.carousel.min.js

61 ms

featherlight.min.js

featherlight.min.js

62 ms

featherlight.gallery.min.js

featherlight.gallery.min.js

62 ms

sf.sandiego-base.js

sf.sandiego-base.js

142 ms

sf.sandiego-foundation-base.js

sf.sandiego-foundation-base.js

141 ms

sf.sandiego-foundation-tooltip.js

sf.sandiego-foundation-tooltip.js

213 ms

sf.sandiego-project.js

sf.sandiego-project.js

260 ms

cmp.php

cmp.php

402 ms

cmp_en.min.js

cmp_en.min.js

779 ms

sf-logo-full.svg

sf-logo-full.svg

160 ms

github-sync.png

github-sync.png

159 ms

sf-icon-black.svg

sf-icon-black.svg

157 ms

1

1

163 ms

18587

18587

160 ms

sf_star_yellow.svg

sf_star_yellow.svg

161 ms

icon

icon

298 ms

icon

icon

164 ms

icon

icon

191 ms

icon

icon

161 ms

ccpa-optout.png

ccpa-optout.png

161 ms

lato-v20-latin-ext_latin-regular.woff

lato-v20-latin-ext_latin-regular.woff

156 ms

lato-v20-latin-ext_latin-700.woff

lato-v20-latin-ext_latin-700.woff

157 ms

cmp.php

cmp.php

104 ms

bV8xLndfMTEzMTkucl9VU1ZDRFBBLmxfZW4uZF8yNDkyLnhfMTEudi5wLnRfMjQ5Mi54dF8zNw.js

bV8xLndfMTEzMTkucl9VU1ZDRFBBLmxfZW4uZF8yNDkyLnhfMTEudi5wLnRfMjQ5Mi54dF8zNw.js

406 ms

Accessibility Review

primer3.sourceforge.net accessibility score

81

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

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

High

Image elements do not have [alt] attributes

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

primer3.sourceforge.net best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

primer3.sourceforge.net SEO score

84

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

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

High

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

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    BINARY

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Primer3.sourceforge.net 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 Primer3.sourceforge.net main page’s claimed encoding is binary. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

primer3.sourceforge.net

Open Graph data is detected on the main page of Primer3 Source Forge. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: