Whats the difference between these 2 type of loops

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#1

so i have a deep thought about this question earlier i wanted to run script so fast without needing to add wait() and not get time exhaustion error. I wonder if this will do it

for i = 1,math.huge,1 do
-- script you want to execute 
end

instead of this

while true do
-- script you want to execute
end
#2

Both of them are basically the same thing.

#3

i wonder if i will still get time exhaustion errors from the output if i used for loop instead

#4

one is a for loop. it iterates forever because you put in infinite iterations
one is a while loop. it iterates forever because the statement is always true

the first code example is stupid and you shouldnt do it

#5

what if i want to do 1 million times the script i want to execute in a fraction of second?

for i = 1,100000,1 do
-- script you want to execute 
end

will this give a time exhaustion error?

#6

it depends on the complexity of your code. if you’re doing a simple operation then it will probably not matter much. If you’re doing a complex operation like instancing parts your game will probably hang until the code finishes or the code is forced to stop

#7

If you are looking to run something at a fast rate you should be using RunService’s built in events. wait() can only go to values as low as 0.03 seconds.

Don’t expect changing a while loop to a for loop to suddenly avoid a script exhaustion error. Using a while loop or for loop that has no time to yield will quickly use up available memory.

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#8

Don’t use while true do or for i = 1, incrediblylongnumber,1 do, just use

game:GetService('RunService').Heartbeat:Connect(function()
     -- CODE
end)
#9

i know run service only runs on client right? what if i want to execute things on server?

#10

RunService:Heartbeat works on the Server and Client.

#11

While loops generally are for when you want to loop constantly.
Repeat loops are the same as while loops but stop when it’s given a true value.
For loops are for iteration, through both tables and numbers.

For loops (other than table iteration) is for incrementing a value:

for i = 0, 1, 0.1 do
-- 0.0, 0,1, 0.2, etc
end

You have fine grain control over the increment steps and such.

As @infiniteRaymond stated for latency connecting to Heartbeat is always better performance wise.

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#12

renderstep is the one on client?

#13

both are same in this case, both will blow your studio if you don’t use a wait()

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#14

Yes, it’s fired every time a frame is rendered.

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#15

using a for loop with an incredibly long number and a while loop pretty much go at the same speed only difference is the for loop has a theoretical end where as the while loop doesnt but as previously mentioned use the RunService and its functions like heartbeat and RenderStep to run things pretty much on a frame basis (heartbeat is like every other frame)

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#17

i tried using runservice.renderstep once on a script and it gave me an error

#18

RenderStepped is client only, as it fires when a frame is rendered. The server doesn’t render anything: RunService | Documentation - Roblox Creator Hub

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#19

probably because your only really “allowed” to use it for certain things like camera, im assuming due to the fact itd be bad for game performace to be run large scripts on a framely basis ( or something like that lol)

#20

then what’s the difference of heatbeat step and renderstepped i can’t see any

#21

heartbeat runs every other frame renderstepped runs every frame (simply put)