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Optimizing checkout load times for international card transactions

Hi everyone, I am currently setting up the CyberSource payment gateway to handle cross-border payments smoothly. The API integration is fully functional, but I am looking for ways to optimize the initial handshake latency to keep the checkout experience as fast as possible.

For reference, I am studying the setup on a live store like Yumi Nutrition Uk to see how top-tier wellness sites configure their merchant scripts. Are there specific caching recommendations or CDN configurations for CyberSource JavaScript files that help minimize script execution times on the front end? Thanks!

Yumi
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