Quality and Performance report

Report generated on Oct 19, 2017 10:36:33 PM
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SIMULATED VISITOR: Chrome Washington DC 10.0/2.0Mbps (Latency: 28 ms) Edit





HTML CSS Scripts Images Others
Timeline / Waterfall

First Byte


Start Render


Fully loaded


Browser warnings 0OK
Speed Index: 334

No technology detected

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Tips and best practices:

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Do all third parties resources deliver the right content?

This page loads data from third parties, you should ensure their integrity.

SubResource Integrity (SRI)

Use SRI to ensure that a third party resource has not been tampered. Add the integrity attribute to <script> and <link> tags loading this kind of resource. Example:

<script src="https://exemple.com/exemple-framework.js"

The integrity attribute value is equal to the base64-encoded hash (SHA) of the resource. The browser compares this hash with the downloaded content in order to determine if the resource matches the expected content.

You can create the SHA thanks to several tool. In command line, you can use openssl. You can also test some online tools, as srihash.org or report-uri.io. Learn more about SubResource Integrity.

Read more

Specify which SSL certificates can be accepted by the browser

Provide the list of valid public cryptographic keys to the web browser in order to avoid some Man-In-The-Middle attacks.

Public Key Pinning

The HTTP Public Key Pinning header allows to define all the public cryptographic keys supported to access your domain via SSL:

Public-Key-Pins: pin-sha256="base64=="; max-age=expireTime
[; includeSubdomains][; report-uri="reportURI"]

The browser stores this list. During the second visit, it will compare this list with the key provided by the certificate authority (CA). If they don't match, the browser will consider the certificate as corrupted and will block the access to the page.

Please, be careful while configuring this header: if the provided certificates are not up to date, your website will be unreachable (see a detailed feedback). Do specify several certificates, including (at least) one fallback certificate. It will allow to deal with the expiration or invalidation cases of a certificate.

Note: We advise you to deploy it progressively by using the report-only mode (Public-Key-Pins-Report-Only header) and limited cache validation times.

Read more about HPKP.

This page doesn't send a Public Key Pinning header.

Read more
Number of requests 

Resources distribution by domain

This page loads data from 1 domains. This best practice retrieves the following metrics for each of these domains:

  • Loading Time (Cumulative): total time spent to load all the resources
  • Server Time (Cumulative): total time spent to retrieve the responses from the server (TCP connection + wait for first byte)
  • Weight: data amount loaded
  • Number of requests

Here is the list of all the domains used by the page:

DomainTime (ms)Server Time (ms)Weight (kB)Requests
miniblogcore.azurewebsites.net 352 325 8 3

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1 selectors are superfluous

It's often inefficient to bring too much preciseness in CSS selectors. For example, in the following rule:

body div .myClass {}

The body element provides no details to select the desired tags. So you should prefer the following selector:

div .myClass {}

In the same way, you do not need to specify a <ul> selector if you specify a <li> behind.

Here are listed the elements considered as potentially redundant: ul li, ol li, table tr, table th, body.

The following files declar some useless selectors:

https://miniblogcore.azurewebsites.net/ (inline 0)

  • .post>div ul li:before (line 1, col 1441)

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This page contains 14 links

Two kind of links exist:

  • Internal links that refer to pages with the same domain name;
  • External links that point to other websites (must be relevant and point towards quality content).

If you reference many links, you can ask the SEO crawlers to consider only some of them, by adding the rel=nofollow attribute to the irrelevant ones (e.g., advertisements).

Here is the distribution of 14 links present in the page:

  • 8 internal links (57,14%)
  • 6 "follow" external links (42,86%)
  • No "nofollow" external link (0,00%)

Read more
Data amount 

This page does not load too much data (0,01 MB)

A too high page weight slows down the display, especially on low speed connections. This can lead to frustration for users paying for data (see whatdoesmysitecost.com).

Evaluate the Weight of my Web Page

In February 2016, the average weight of 100 most visited websites in the world was 1,38MB.

How to reduce the weight of my page?

You can report to our "Data amount" category to discover the possible optimizations in your case. Images are often involved.
Moreover, make sure to build your web pages in order to load data that is essential to the user experience (rendering optimization of the critical path).
For other contents (social networking plugins, advertising, content at the bottom of the page ...), it is better to delay the loading (asynchronous, lazy-loading ...), so they don't override priority contents.

We strongly recommend that you define performance budgets before you carry out your web projects. These budgets can be settled through the DareBoost monitoring feature.

We have established the weight distribution of the page by resource type:

  • Texts : 77,56% of total weight
  • CSS : 14,13% of total weight
  • Images : 8,31% of total weight

Here is the weight of the resources over the network, and that are necessary to load the page, in descending order:

Read more

Well done, these best practices are respected



CSS properties are not duplicated

Using several times the same property within a same CSS rule can affect the readability of the CSS. It is also an optimization opportunity: by removing duplicated properties, you will reduce the file size.

CSS properties

The CSS properties allow to apply a style to a set of elements. It is unnecessary to define 2 times the same property with the same value in a same rule.

How to improve it?

Remove one occurrence of the duplicated property. For example, the following properties:

.myClass {
margin: 10px;
margin: 10px;

Should be replaced by:

.myClass {
margin: 10px;

Read more
Cache policy 


You do not use too long inline scripts

Any script with a significant size should let the browser cached them in order to reduce loading time/improve performance of your returning visitor.

Inline scripts / cache policy

"inline" scripts allow to integrate easily small portions of scripts directly in the HTML code. Example:

<script type="text/javascript">
    ga('create', 'UA-11111111-1', 'mywebsite.com');

By doing so, you avoid making a request to the server to retrieve the resource. So inline scripts represent a performance gain if you want to integrate small scripts.

However, once a script has a fairly substantial size, we advise you to outsource it and perform a request to retrieve it. So you will benefit from the cache mechanism.

What should I do?

Outsource your scripts with more than 1500 characters in one or more separate files.

Read more


No nested tables detected

table tag should only be used to render ordered data. Handle the elements layout with CSS instructions.

You can use colspan and rowspan properties to represent complex data.

No nested table found in this page.

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You have defined a <meta> 'description'

The page should define a unique description.

Description in search engines

The description of the page may be directly displayed in search engine results pages (SERP):

It allows you to control at best the entry preview in search engines, and to improve the click rate to your page. Learn more.

How to define a page's description?

Use <meta name="description" content="page description"> and place it in the <head> tag.

This page defines one <meta> description:

A short description of the blog

Read more


This page uses only standard image formats

The images that use a non-standard format may not be indexed by search engines.

Only these image formats are considered standard on the web: jpeg, jpg, png, gif, svg, ico, webp. You should consider an alternative to any other format.

Moreover, remember to treat the text around your images: some search engines analyze approximately the 10 words preceding and following the image in order to add a context to the image.

Read more


No frameset, frame and noframes tags detected

These tags are obsolete, due to several issues related to the navigation consistency, SEO or browsers' bookmark features for example.

None of these tags is detected on this page.

The use of the iframe tag is prefered.

Read more