- mawk (https://invisible-island.net/mawk/) - bundled in some Linux distros (?), known as the fastest byte-code compiled implementation.
All three have very good compatibility, but Gawk is super-set over POSIX standard. I have some evidence here, since I regularly test [1] against these implementations and even some others, like GoAWK.
To my knowledge the major dialects in use are:
- One True Awk (aka bwk) (https://github.com/onetrueawk/awk) - this one is bundled in all *BSD/macOS
- Gawk (https://www.gnu.org/software/gawk/) - this one is bundled in most Linux
- mawk (https://invisible-island.net/mawk/) - bundled in some Linux distros (?), known as the fastest byte-code compiled implementation.
All three have very good compatibility, but Gawk is super-set over POSIX standard. I have some evidence here, since I regularly test [1] against these implementations and even some others, like GoAWK.
[1] https://github.com/xonixx/makesure/actions/runs/1830978431