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#How does compression work exactly in next.js?
weary boughBOT
Based on the knowledge sources provided, I can offer some clarification on how compression works in Next.js:
Next.js does indeed use gzip compression by default for rendered content and static files when using next start or a custom server. This is an optimization to reduce bandwidth usage and improve application performance. However, there are some important points to note:
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Default Compression: As mentioned in the Next.js documentation on compression, gzip compression is applied to rendered content and static files by default.
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API Routes: It's important to note that API routes, including server actions, are not automatically compressed by Next.js. This is highlighted in a GitHub issue where it's mentioned that API route responses are not being gzipped in the Next.js App Router.
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Vercel Deployment: If you're deploying your Next.js application on Vercel, the compression behavior is different. According to the Vercel documentation on compression, Vercel's Edge Network uses both gzip and brotli compression, with brotli being preferred if the client supports it.
Regarding your specific scenario with a server action returning a 10MB array, the compression would not be automatically applied by Next.js. You would need to implement compression manually for such large API responses, or consider other optimization strategies like pagination or data streaming.