NHF – new heroes for Heroes V 3.1.

For example, I tested sleep() and sleep(0.1), and sleep(1).
The first one sometimes doesn't have enough time. The second one is fine, the third one takes too long.))
Does it really discard the decimal part? Something's not right here. Multithreading.

sleep() is analogous to sleep(1).
sleep(0.1) is analogous to sleep(intg(0.1)), i.e., sleep(0).
I just tried a simple script:

for i=1,1000 do
	print(""..i)
	sleep(1)
	print(""..i)
	sleep(.999)
end

Mode: network. The numbers appear in pairs - blue i-1 and red i - with an interval of 1/5 second.
If sleep accepted decimal values, the numbers would appear one at a time.

Added after 48 minutes
Here's a more illustrative example.

while 1 do
	local effect = "/Effects/_(Effect)/Spells/Bloodlust.xdb#xpointer(/Effect)"
	for i=1,20 do
		PlayVisualEffect(effect, '', '', 24+i, 20)
		sleep(.999)
	end
	for i=1,20 do
		PlayVisualEffect(effect, '', '', 24+i, 24)
		sleep(1)
	end
	sleep(20)
end