Access tools.rosinstrument.com.

name

value

score

weighting

FCP (First Contentful Paint)

Value4.1 s

21/100

10%

LCP (Largest Contentful Paint)

Value10.7 s

0/100

25%

SI (Speed Index)

Value7.0 s

32/100

10%

TBT (Total Blocking Time)

Value520 ms

56/100

30%

CLS (Cumulative Layout Shift)

Value0.142

78/100

15%

TTI (Time to Interactive)

Value13.1 s

12/100

10%

tools.rosinstrument.com

137 ms

152 ms

p.css

89 ms

branding.css

27 ms

show_ads.js

24 ms

Our browser made a total of 79 requests to load all elements on the main page. We found that 51% of them (40 requests) were addressed to the original Tools.rosinstrument.com, 11% (9 requests) were made to Apis.google.com and 8% (6 requests) were made to Googleads.g.doubleclick.net. The less responsive or slowest element that took the longest time to load (336 ms) relates to the external source Googleads.g.doubleclick.net.

Content Size

250.0 kB

After Optimization

126.5 kB

In fact, the total size of Tools.rosinstrument.com main page is 250.0 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. HTML takes 120.7 kB which makes up the majority of the site volume.

HTML Optimization

-77%

Potential reduce by 93.3 kB

Original 120.7 kB
After minification 120.3 kB
After compression 27.4 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 93.3 kB or 77% of the original size.

Image Optimization

-8%

Potential reduce by 4.4 kB

Original 57.7 kB
After minification 53.2 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. Tools Rosinstrument images are well optimized though.

JavaScript Optimization

-27%

Potential reduce by 15.9 kB

Original 58.3 kB
After minification 58.1 kB
After compression 42.4 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 15.9 kB or 27% of the original size.

CSS Optimization

-75%

Potential reduce by 9.9 kB

Original 13.3 kB
After minification 12.5 kB
After compression 3.4 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. Tools.rosinstrument.com needs all CSS files to be minified and compressed as it can save up to 9.9 kB or 75% of the original size.

Requests Now

After Optimization

The browser has sent 74 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Tools Rosinstrument. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 18 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Issues

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

High

[aria-*] attributes do not match their roles

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.

High

Buttons do not have an accessible name

High

Form elements do not have associated labels

High

Links do not have a discernible name

These are opportunities to improve the legibility of your content.

High

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

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

High

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

Areas of Improvement

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

High

Serves images with low resolution

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

Search Engine Optimization Advices

Format your HTML in a way that enables crawlers to better understand your app’s content.

High

Links do not have descriptive text

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

High

Links are not crawlable

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/).

High

Document uses legible font sizes

Language and Encoding

Language Detected

N/A
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 Tools.rosinstrument.com can be misinterpreted by Google and other search engines. Unfortunately we cannot identify language used on the page (probably there is a mix of languages, too little text or something else) and no language is claimed in <html> or <meta> tags either. Our system also found out that Tools.rosinstrument.com 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

tools.rosinstrument.com

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

Report Summary

Performance

Accessibility

Best Practices

SEO

Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)

Network Requests Diagram

tools.rosinstrument.com

p.css

branding.css

show_ads.js

Page Optimization Overview & Recommendations

Content Size

After Optimization

HTML Optimization

Image Optimization

JavaScript Optimization

CSS Optimization

Requests Breakdown

Requests Now

After Optimization

Network Requests Diagram

tools.rosinstrument.com

p.css

branding.css

show_ads.js

key.gif

index.gif

burst.gif

text.gif

binhex.gif

comp2.gif

comp1.gif

transfer.gif

generic.gif

broken.gif

image.gif

unknown.gif

doc.gif

continued.gif

branding.css

widgets.js

plusone.js

ca-pub-8829969316757294.js

zrt_lookup.html

show_ads_impl.js

sel_left.jpg

sel_right.jpg

sel_left_r.jpg

sel_right_r.jpg

iconRSS.gif

email_link.png

facebook.png

vk.png

googlebookmark.png

digg.png

delicious.png

blinklist.png

newsvine.png

reddit.png

yahoomyweb.png

lj.gif

blogmarks.png

twitter.png

live.png

news2.gif

bobr.gif