Report Summary

  • 94

    Performance

    Renders faster than
    93% of other websites

  • 53

    Accessibility

    Visual factors better than
    that of 21% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 62

    SEO

    Google-friendlier than
    22% of websites

curta.li

curta rechenmaschine ~ curta calculator ~ curta calculateur | willkommen - welcome - bienvenue

Page Load Speed

1.8 sec in total

First Response

287 ms

Resources Loaded

1.3 sec

Page Rendered

150 ms

curta.li screenshot

About Website

Visit curta.li now to see the best up-to-date Curta content for United States and also check out these interesting facts you probably never knew about curta.li

Curt Herzstark - Rechenmaschine Curta

Visit curta.li

Key Findings

We analyzed Curta.li page load time and found that the first response time was 287 ms and then it took 1.5 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.

Performance Metrics

curta.li performance score

94

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.4 s

97/100

10%

LCP (Largest Contentful Paint)

Value3.0 s

79/100

25%

SI (Speed Index)

Value1.9 s

100/100

10%

TBT (Total Blocking Time)

Value20 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value2.3 s

99/100

10%

Network Requests Diagram

curta.li

287 ms

a_nav.js

99 ms

curta.css

186 ms

counter.js

5 ms

nav_on_01.gif

109 ms

Our browser made a total of 32 requests to load all elements on the main page. We found that 88% of them (28 requests) were addressed to the original Curta.li, 3% (1 request) were made to Statcounter.com and 3% (1 request) were made to S10.histats.com. The less responsive or slowest element that took the longest time to load (923 ms) belongs to the original domain Curta.li.

Page Optimization Overview & Recommendations

Page size can be reduced by 9.8 kB (32%)

Content Size

30.2 kB

After Optimization

20.4 kB

In fact, the total size of Curta.li main page is 30.2 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. Only 10% of websites need less resources to load. Javascripts take 21.7 kB which makes up the majority of the site volume.

HTML Optimization

-71%

Potential reduce by 3.9 kB

  • Original 5.5 kB
  • After minification 4.9 kB
  • After compression 1.6 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 3.9 kB or 71% of the original size.

JavaScript Optimization

-16%

Potential reduce by 3.4 kB

  • Original 21.7 kB
  • After minification 21.4 kB
  • After compression 18.3 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 3.4 kB or 16% of the original size.

CSS Optimization

-84%

Potential reduce by 2.6 kB

  • Original 3.0 kB
  • After minification 2.5 kB
  • After compression 473 B

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. Curta.li needs all CSS files to be minified and compressed as it can save up to 2.6 kB or 84% of the original size.

Requests Breakdown

Number of requests can be reduced by 20 (67%)

Requests Now

30

After Optimization

10

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

Accessibility Review

curta.li accessibility score

53

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.

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

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

High

Links do not have a discernible name

Best Practices

curta.li best practices score

67

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

curta.li SEO score

62

Search Engine Optimization Advices

Crawling and Indexing

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

Impact

Issue

High

robots.txt is not valid

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

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    ISO-8859-1

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Curta.li 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 Curta.li main page’s claimed encoding is iso-8859-1. 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

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