How To Design For High-Traffic Events And Prevent Your Website From Crashing - Smashing Magazine
Briefly

Product launches and sales attract large volumes of traffic. Too many concurrent server requests can lead to website crashes if you're unprepared.
Optimizing and compressing images can free up space and reduce server load, effectively addressing slow loading times and bandwidth issues during high traffic events.
Switching to a scalable cloud-based web host allows businesses to handle significant spikes in traffic efficiently, preventing revenue loss and maintaining site performance.
Adopting modern image formats like WebP can reduce image weight significantly, helping websites perform better and remain accessible during crucial sales events.
Read at Smashing Magazine
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