Heatbeat vs While loop?

[dry peak]

I'm wondering which is more performant, using a heartbeat event and having an elapsed time variable to play a callback at intervals or just using a while loop with task.wait(interval). I'm not really sure how I would bench mark this.

[young burrow]

It depends on what you are doing. Neither are expensive.

To benchmark anything, you can use a timestamp function like tick or time and subtract one time stamp from another

local startTime = tick()
a = 1; a+=1;
warn("that took " .. tostring(tick() - startTime) .. " seconds")

[sand shale]

Heartbeat and task.wait both are almost identical but the best option is to use task.wait without the while true do

[dry peak]

alright thanks

[dry peak]

like with recursion?

[sand shale]

local timeTillNextCallBack = 60 -- seconds
task.delay(timeTillNextCallBack, callback)

[glacial thistle]

For ur case specifically while loop, otherwise ur are technically wasting cpu with heartbeat

Generally speaking, heartbeat over task.wait loop is better

[sand shale]

-- takes around 28ms on Suphi's computer to run 20000 Heartbeat connections
local runService = game:GetService("RunService")

local function Loop()
    
end

for i = 1, 20000 do
    runService.Heartbeat:Connect(Loop)
end

-- takes around 28ms on Suphi's computer to run 15000 while true do loops
local function Loop()
    while true do
        task.wait()
    end
end

for i = 1, 15000 do
    task.defer(Loop)
end

[glacial thistle]

How do you even benchmark that

You’re deferring it anyways

[young burrow]

15k deferments 🤠

[sand shale]

I look at CPU time per frame
Every frame with 20000 heartbeat connections takes 28ms of CPU time

And with 15000 while true do loops takes 28ms of CPU time

I use the micro profiler maybe this video will help
https://youtu.be/BbIPalpAfaI

[glacial thistle]

Extremely inaccurate test

You realize cpu is capped by a lot

[sand shale]

accurate enough to tell what's faster or slower

if the difference was only around 1000 then I would say there the same but with a delta of 5000 its obvious

[glacial thistle]

inherently flawed cause you're defering it to the next engine cycle

course it's going to be slower lol

It's slower because you're running it slower

[sand shale]

i measuring all cycles not the current cycle

defer only runs when the script starts

[glacial thistle]

i should make an album of all your suphi moments

[fallen canyon]

if you want accurate then use heartbeat

if u want yield the script then use while true do

[fallen canyon]

to access deltatime you can just do (not accurate in my opinion)

while true do
  local deltaTime = task.wait()
end