June 23, 2026

Future format, present-day roast

F3

A shiny “file format of the future” drops—and commenters instantly ask, “Future when?”

TLDR: F3 is a research project pitching a new way to store data files so they’re easier to read in the future, but even its own page warns not to use it for real work yet. Commenters weren’t sold: they joked the idea lives in “the future” and demanded a clearer explanation of why anyone should switch today.

F3 arrived with a big sci-fi promise: an open-source way to store data that claims it can fix old problems in popular systems like Parquet and stay flexible for years to come. The pitch is bold—every file can carry tiny built-in decoders so it can still be read later, even if software changes. Very futuristic, very ambitious, very "don’t use this in production". And that warning? The community noticed.

Instead of a victory lap, the comment section turned into a friendly-but-brutal reality check. The loudest reaction was basically: Cool idea, but explain it like I’m a human being. Multiple readers dragged the README for being too vague, saying it name-drops competitors and deep implementation details without clearly answering the simplest question: why should anyone care? One commenter summed up the mood perfectly—within a couple of minutes, they still weren’t convinced what problem this thing actually solves.

Then came the skepticism bombs. One person asked the obvious: if this is supposed to beat today’s data formats, which shortcomings does it actually fix? Another delivered the thread’s funniest line: “I’ll use Parquet in the present.” Ouch. There was even some side-eye over the repo showing no commits in 8 months, which only added to the “is this the future, or just a paper project?” drama. Still, not everyone was dunking on it—some commenters said the idea sounds promising and could get traction if the team actually explains the advantages upfront. In other words: the tech may be future-proof, but the README definitely isn’t.

Key Points

  • F3 is presented as an open-source columnar data file format aimed at improving efficiency, interoperability, and extensibility.
  • The repository explicitly warns that F3 is a research prototype and should not be used in production.
  • F3’s design includes self-describing files that embed WebAssembly decoders alongside data and metadata.
  • The project repository includes build, test, benchmark, and experiment-reproduction instructions, with testing noted on Intel hardware running Debian 12.
  • A 2025 ACM paper reports evaluations comparing F3 with legacy and state-of-the-art open-source file formats and claims benefits from its storage layout and Wasm-driven decoding.

Hottest takes

"I'll use it. In the 'future.' ... I'll use Parquet in the present." — thisisauserid
"This could use a bit more 'why'." — largbae
"No commits in 8 months?" — adammarples
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