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Learn Data Science – Python, R, SQL, PowerBI

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97% of learners recommend Dataquest for learning AI and data skills. Better teaching = better outcomes. Take a free lesson now >>

Dataquest.io Test Results

dataquest.io Mobile Usability: 100/100


dataquest.io Mobile Speed: 84/100

Quick overview:
Leverage browser caching
Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.
Leverage browser caching for the following cacheable resources:
https://dna8twue3dlxq.cloudfront.net/js/profitwell.js (expiration not specified)
...
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Your page has 1 blocking CSS resources. This causes a delay in rendering your page.
None of the above-the-fold content on your page could be rendered without waiting for the following resources to load. Try to defer or asynchronously load blocking resources, or inline the critical portions of those resources directly in the HTML.
Optimize CSS Delivery of the following:
https://www.dataquest.io/app.7c31bf05f1679911cfec.css
Minify JavaScript
Compacting JavaScript code can save many bytes of data and speed up downloading, parsing, and execution time.
Minify JavaScript for the following resources to reduce their size by 691B (34% reduction).
Minifying https://connect.facebook.net/en_US/fbds.js could save 691B (34% reduction) after compression.

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