--- title: Why does C have the best file API? (Maurycy's blog) description: A provocative argument that C's file API is underrated because it allows memory-mapping files and treating them as typed memory directly, without mandatory... canonical: https://daily.dev/posts/why-does-c-have-the-best-file-api-maurycy-s-blog--tiolb8nj7 twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Why does C have the best file API? (Maurycy's blog) | daily.dev og:description: A provocative argument that C's file API is underrated because it allows memory-mapping files and treating them as typed memory directly, without mandatory... og:url: https://daily.dev/posts/why-does-c-have-the-best-file-api-maurycy-s-blog--tiolb8nj7 og:image: https://api.daily.dev/og/posts/TiolB8nj7.png og:image:alt: Why does C have the best file API? (Maurycy's blog) og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Why does C have the best file API? (Maurycy's blog) **[Lobsters](https://daily.dev/sources/lobsters)** · 4 min read · 4 upvotes · 0 comments ## Summary A provocative argument that C's file API is underrated because it allows memory-mapping files and treating them as typed memory directly, without mandatory serialization/deserialization. Most languages expose mmap only as byte arrays, forcing parse-process-serialize cycles even for simple binary data. The post argues this assumption — that disk data always needs parsing — is flawed, especially on memory-constrained systems or with large files. It also critiques filesystem APIs as thin wrappers around C's readdir(), pushing developers toward SQLite or other databases that fit even worse. The conclusion is that languages should allow programs to directly manipulate on-disk binary representations the same way they manipulate in-memory data. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [How Memory Maps \(mmap\) Deliver 25x Faster File Access in Go](https://daily.dev/posts/how-memory-maps-mmap-deliver-25x-faster-file-access-in-go-cf67cm563) · Hacker News · 2 upvotes · 0 comments - [The “files are all you need” debate misses what’s actually happening in agent memory architecture](https://daily.dev/posts/the-files-are-all-you-need-debate-misses-what-s-actually-happening-in-agent-memory-architecture-nz6feksep) · The New Stack · 1 upvotes · 0 comments - [I want extern "fil-c"](https://daily.dev/posts/i-want-extern-fil-c--jbh9jxdwl) · Lobsters · 0 upvotes · 0 comments --- Tags: [#c](https://daily.dev/tags/c) [View this post on daily.dev](https://daily.dev/posts/why-does-c-have-the-best-file-api-maurycy-s-blog--tiolb8nj7) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Why does C have the best file API? 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