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fcat, short forfastcat, is acat implementation in Rust using Linux'ssplice syscall.
With that little trick, it'smore than three times as fast as the systemcat in our benchmarks.
Read theannouncement here.

⚠️This project is currently broken on newer Linux versions (5.9+) because of some changes
concerning thesplice system call. (Seehere andhere.) This can't be fixed unless changes to the kernel get made.

cat myfile | pv -r > /dev/null[1.90GiB/s]

fcat myfile | pv -r > /dev/null[5.90GiB/s]

Note: Only works on Linux.
(But you can send me a pull request for other operating systems.)

cargo install fcat

fcat file1 file2 file3

• Be the fastest cat in town.
• Be a drop-in replacement for (POSIX) cat.

• Provide any additional functionality other than whatcat provides.
  If you're looking for a morebeautiful cat, check outbat.

If you runfcat /dev/zero >> myfile, it will fail with exit codeEINVAL because, according to thesplice manpage: "The target file is opened in append mode."

• You probably won't ever need this, but it's a fun little experiment.
  Still, I wonder why this is not part of e.g. GNU cat...
• What I like the most about the project is the logo.

fcat is licensed under either of

• Apache License, Version 2.0, (LICENSE-APACHE orhttp://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT orhttp://opensource.org/licenses/MIT)

at your option.