Tools & Wizards About Us
brendangregg.com screenshot

Report Summary

  • 96

    Performance

    Renders faster than
    94% of other websites

  • 64

    Accessibility

    Visual factors better than
    that of 29% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 50

    SEO

    Google-friendlier than
    18% of websites

brendangregg.com

Brendan Gregg's Homepage

Page Load Speed

1.8 sec in total

First Response

448 ms

Resources Loaded

576 ms

Page Rendered

747 ms

brendangregg.com screenshot

About Website

Click here to check amazing Brendan Gregg content for China. Otherwise, check out these important facts you probably never knew about brendangregg.com

Brendan Gregg's homepage: I use this site to share various things, mostly my work with computers, specifically, computer performance analysis and methodology.

Visit brendangregg.com

Key Findings

We analyzed Brendangregg.com page load time and found that the first response time was 448 ms and then it took 1.3 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 30% of websites can load faster.

Performance Metrics

brendangregg.com performance score

96

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.6 s

95/100

10%

LCP (Largest Contentful Paint)

Value2.6 s

87/100

25%

SI (Speed Index)

Value1.6 s

100/100

10%

TBT (Total Blocking Time)

Value90 ms

99/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value2.6 s

98/100

10%

Network Requests Diagram

brendangregg.com

448 ms

page.css

114 ms

ga.js

29 ms

ir

8 ms

brendan_rajasthan2011_thumb.jpg

174 ms

Our browser made a total of 12 requests to load all elements on the main page. We found that 58% of them (7 requests) were addressed to the original Brendangregg.com, 25% (3 requests) were made to Assoc-amazon.com and 17% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (448 ms) belongs to the original domain Brendangregg.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 44.6 kB (37%)

Content Size

120.5 kB

After Optimization

75.9 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Brendangregg.com main page is 120.5 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. HTML takes 52.9 kB which makes up the majority of the site volume.

HTML Optimization

-71%

Potential reduce by 37.6 kB

  • Original 52.9 kB
  • After minification 52.8 kB
  • After compression 15.3 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 37.6 kB or 71% of the original size.

Image Optimization

-10%

Potential reduce by 4.9 kB

  • Original 47.6 kB
  • After minification 42.7 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. Brendan Gregg images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 34 B

  • Original 17.2 kB
  • After minification 17.2 kB
  • After compression 17.1 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

-74%

Potential reduce by 2.0 kB

  • Original 2.7 kB
  • After minification 1.9 kB
  • After compression 724 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. Brendangregg.com needs all CSS files to be minified and compressed as it can save up to 2.0 kB or 74% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

11

After Optimization

11

  • Images
  • JavaScript
  • CSS

The browser has sent 11 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Brendan Gregg. According to our analytics all requests are already optimized.

Network Requests Diagram

brendangregg.com

brendangregg.com

448 ms

page.css

page.css

114 ms

ga.js

ga.js

29 ms

ir

ir

8 ms

brendan_rajasthan2011_thumb.jpg

brendan_rajasthan2011_thumb.jpg

174 ms

systemsperf_cover_123.jpeg

systemsperf_cover_123.jpeg

263 ms

dtracebookcover_123.jpg

dtracebookcover_123.jpg

197 ms

solarisperfbookcover_119.jpg

solarisperfbookcover_119.jpg

199 ms

dash.png

dash.png

155 ms

ir

ir

3 ms

ir

ir

5 ms

__utm.gif

__utm.gif

11 ms

Accessibility Review

brendangregg.com accessibility score

64

Accessibility Issues

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

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

Best Practices

brendangregg.com 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

Displays images with incorrect aspect ratio

High

Serves images with low resolution

SEO Factors

brendangregg.com SEO score

50

Search Engine Optimization Advices

Content Best Practices

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

Impact

Issue

High

Links do not have descriptive text

High

Image elements do not have [alt] attributes

Crawling and Indexing

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

Impact

Issue

High

Links are not crawlable

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 Brendangregg.com 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 Brendangregg.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

brendangregg.com

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