Instruction: Discuss the mechanisms Next.js employs to optimize performance for static pages.
Context: This question assesses the candidate's understanding of Next.js features related to static site generation and performance optimization.
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To begin, Next.js enhances performance for static pages through its Static Site Generation (SSG) feature. This means that at build time, Next.js pre-renders the pages into HTML, which are then served to the client without the need for server-side computation for each request. This drastically reduces the time to first byte (TTFB), ensuring that the content is delivered to the users as quickly as possible.
Another key mechanism is Incremental Static Regeneration (ISR). With ISR, developers can update static content after the site has been built without needing to rebuild the entire site. This is done by specifying a revalidate time, which allows Next.js...