Substack.com Site Title

Substack

Substack.com Meta Description

Substack makes it simple for a writer to start an email newsletter that makes money from subscriptions.

Substack.com Test Results

substack.com Mobile Usability: 100/100


substack.com Mobile Speed: 27/100

Quick overview:
Optimize images
Properly formatting and compressing images can save many bytes of data.
Optimize the following images to reduce their size by 2.2MiB (82% reduction).
Compressing https://www.substack.com/img/author-pics/anthony-pompliano-cover.jpg could save 353.5KiB (83% reduction).
...
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Your page has 3 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.substack.com/css/font-awesome.4.7.0.min.css
...
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://api.segment.io/v1/p (expiration not specified)
...
Enable compression
Compressing resources with gzip or deflate can reduce the number of bytes sent over the network.
Enable compression for the following resources to reduce their transfer size by 23.4KiB (77% reduction).
Compressing https://www.substack.com/css/font-awesome.4.7.0.min.css could save 23.4KiB (77% reduction).

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