A faster lolcat. (Unaffiliated with the original lolcat, at https://github.com/busyloop/lolcat.)
Source: /r/photoshopbattles
I wanted moar rainbowz.
Extremely unscientific.
$ timeout 60 cat /dev/urandom | hexdump -C | target/release/roflcat | pv > /dev/null
3.10GiB 0:01:00 [54.1MiB/s]
$ timeout 60 cat /dev/urandom | hexdump -C | lolcat | pv > /dev/null
1.18GiB 0:01:00 [20.4MiB/s]Measured on an AMD Ryzen R5-1600 @ 3.2GHz (12-core) CPU, on 64-bit Arch Linux.
roflcat and lolcat are single-threaded applications.
$ uname -a
Linux triangulum 4.19.80-1-lts #1 SMP Fri Oct 18 05:03:40 UTC 2019 x86_64 GNU/Linux
$ rustc --version
rustc 1.38.0 (625451e37 2019-09-23)
$ roflcat --version
roflcat 0.1.0
$ ruby --version
ruby 2.5.7p206 (2019-10-01 revision 67816) [x86_64-linux]
$ lolcat --version
lolcat 100.0.0 (c)2011 [email protected]Lolcat is licensed under a BSD 3-Clause License. See LICENSES for the full text and copyright.