RapidAPI conducted an experiment by replacing npm with Yarn as their dependency manager to evaluate performance changes. They found that Yarn significantly reduced their build time from 7 minutes to 2.5 minutes without encountering major bugs, thereby allowing more efficient task completion and faster releases. Yarn, initially developed by Facebook, addresses issues of speed, security, and reliability that are associated with npm by caching packages and executing downloads in parallel, while also verifying package integrity through checksums. The transition to Yarn was seamless, as it utilizes the same package.json and node_modules as npm, and its installation process was straightforward with well-documented migration support. While Yarn's integration was mostly beneficial, some concerns about its functionality in uncommon use cases and inability to run custom scripts were noted, although it proved to be a successful and recommended tool for RapidAPI's development needs.