We haven't been doing a great job of keeping this up-to-date, but it does still hit the major highlights.
Managed
and Unsafe
)NoEditAndContinue
)FloatFast
and FloatStrict
)NativeWChar
)OptimizeSize
and OptimizeSpeed
)NoRTTI
)EnableSSE
and EnableSSE2
)ExtraWarnings
and NoWarnings
)require (modified)
debug.prompt (new)
http.download (new)
http.get (new)
os.chmod (new)
os.islink (new)
os.realpath (new)
os.uuid (can now generated deterministic name-based UUIDs)
path.getabsolute (new "relative to" argument)
string.hash (new)