Hello, I have recently become webmaster for a publisher with a website that has averaged about 110,000 visits and 35 GB of monthly bandwith since May. I currently have the site on a LiteSpeed server, with LSCache and Quic cloud all tuned to the best performance I can muster on this shared hosting account (yes, I KNOW). Google PageSpeed shows:

• 1.1s FCP
• 1.5s LCP
• 86ms INP
• 0.04 CLS
• 0.6 TTFB
• 2.9s Speed Index

I am looking for ways to speed up the site with the limited access I have to a shared hosting environment, especially the backend. We have about 2,800 subscribers that receive a twice-weekly newsletter delivered via WordPress plugin. Sometimes it takes all day to send out the emails. I would be interested in learning how I might de-couple the backend functions of the site so that composing and sending the newsletter is faster.

A few pre-emptive answers:

• Cloudflare - yes, it is my primary DNS and the site content is delivered via Quic cloud proxy.
• No, I am not using a Page Builder plugin on the frontend - I hate them.
• No, we won't switch to Mailchimp or other hosted solution because of the investments already made in the email template and its integration with our membership database.

I have found mixed results when tinkering with heartbeat timing - backend doesn't speed up with a slower heartbeat. What else should I be looking at?

Thanks in advance for all your kind and helpful responses. 😄