Why V8 While the software ecosystem of RISC-V has evolved rapidly in the last decade, an important domain of applications, web applications, is still missing from the scene. At the heart of the web technology stack are web browsers, and every major web browser today uses JavaScript (JS) engines with Just-in-time (JIT) compilers. The lack of a mature JS engine that supports RISC-V is a major roadblock to enabling the web stack on RISC-V. Today, every major web browser employs its own JavaScript engine, such as V8 for Chromium-based browsers (e.g. Chrome, Brave), TraceMonkey for Firefox, and JavaScriptCore for Safari. According to Wikipedia, Chromium-based browsers account for two thirds of browser usage shares (in terms of percentage of web sites visited by a particular web browser) in 2020. In addition, Node.js, the dominant server-side JavaScript runtime framework, brings JavaScript beyond browsers and onto the cloud and edge devices as web backends and serverless function platforms. Both Chromium-based browsers and Node.js are powered by V8, the open-source JavaScript engine developed by Google in 2008. As such, V8 is considered the most widely used JS Engine for both client-side and server-side JavaScript.