[EXPERIMENT]Keyboard latency at different debounce settings

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ko4
Posts: 64
Joined: 06 Jul 2018, 16:14

[EXPERIMENT]Keyboard latency at different debounce settings

Post by ko4 » 09 Feb 2020, 18:38

testing methodology

Game: Fortnite 240fps locked in-game exclusive fullscreen
Keyboard: Ducky One 2 Mini (adjustable debounce) 1000ms polling rate
Camera: Note 9 960fps
Monitor: Dell s2716dg

I am hitting the key by flicking my finger. Easy method to get the point of actuation with id say 4-5ms accuracy
I stop counting frames at first on screen reaction so the 144hz refresh rate should not cause any unwanted variations

sample video:
phpBB [video]


Results:
results.PNG
results.PNG (10.33 KiB) Viewed 1983 times
https://docs.google.com/spreadsheets/d/ ... sp=sharing


These values do not represent the actual latency of the keyboard but the whole chain from keypress to display on my particular setup
However, the results still show that the debounce settings does in fact have an effect on keypress to usb latency

EDIT:
Decided to test some of my other boards and got a few surprising results
results2.PNG
results2.PNG (7.15 KiB) Viewed 1950 times
Surprised to see that the Corsair is faster than all of the ones i've tested so far because you'd think theyd use oem pcb's like any other just like they do with their power supplies

I will test the Logitech G-pro wired keyboard when i get my hands on it
Should get some interesting results because this board was shown to have 9 ms on a Razer keyboard
phpBB [video]

UPDATE:
finally got my hands on g pro romer-G

here are the results
results 5.PNG
results 5.PNG (2.19 KiB) Viewed 1818 times
Last edited by ko4 on 12 Feb 2020, 16:19, edited 3 times in total.

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Chief Blur Buster
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Joined: 05 Dec 2013, 15:44

Re: [EXPERIMENT]Keyboard latency at different debounce settings

Post by Chief Blur Buster » 09 Feb 2020, 19:35

That's pretty neat!

Thank you for sharing your results.

The debounce latency is definitely statistically showing up in your results!

Immediately, right off the bat, I can see that the 240fps + 240Hz (1/240sec granularity) is probably one of the biggest error margin -- possibly bigger margin than finger flick interpretation.
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MatrixQW
Posts: 175
Joined: 07 Jan 2019, 10:01

Re: [EXPERIMENT]Keyboard latency at different debounce settings

Post by MatrixQW » 11 Feb 2020, 09:20

Isn't it better to just use ps/2 keyboard?

Krizak
Posts: 9
Joined: 05 Feb 2020, 18:56

Re: [EXPERIMENT]Keyboard latency at different debounce settings

Post by Krizak » 13 Feb 2020, 23:28

Any chance you could try testing a keyboard with the optical switches. Even though your testing is capturing the whole chain and is subject to some error, would still be interested in seeing the results. The following are 2 keyboards I know that use optical switches even though slightly different technologies:

Bloody B930/B970
https://www.amazon.com/Tenkeyless-Keybo ... 02&sr=8-11
https://www.amazon.com/Keyboard-Bloody- ... 446&sr=8-3

Wooting One/Two
https://www.amazon.com/WOOTING-Linea%E2 ... 484&sr=8-2
Game PC: ASUS PG258Q 240hz, 8700K 5.1ghz OC , ASUS MAXIMUS IX APEX Z270, 2 x 8GB 4200Mhz 16-16-16-36, Nvidia 1080FE
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ko4
Posts: 64
Joined: 06 Jul 2018, 16:14

Re: [EXPERIMENT]Keyboard latency at different debounce settings

Post by ko4 » 17 Feb 2020, 23:12

Krizak wrote:
13 Feb 2020, 23:28
Any chance you could try testing a keyboard with the optical switches. Even though your testing is capturing the whole chain and is subject to some error, would still be interested in seeing the results. The following are 2 keyboards I know that use optical switches even though slightly different technologies:

Bloody B930/B970
https://www.amazon.com/Tenkeyless-Keybo ... 02&sr=8-11
https://www.amazon.com/Keyboard-Bloody- ... 446&sr=8-3

Wooting One/Two
https://www.amazon.com/WOOTING-Linea%E2 ... 484&sr=8-2
Hey,

I was going to purchase the Bloody B930 because I don't like how the romer-G's feel and linears are my favorite
I did test out this 50$ keyboard iGK61p that uses optical Gateron switches
here are the results
igk61p.PNG
igk61p.PNG (2.89 KiB) Viewed 1533 times
Relatively high despite being optical.
It's a fairly cheap keyboard so I suspect they never optimized the electronics for lower latency

Looks like i'm going to try the B930 next

as for the Wooting boards
somebody already tested their latency
https://twitter.com/sunjun_kim/status/9 ... 7173860352

I think the wooting is on par with the logitech g pro

ko4
Posts: 64
Joined: 06 Jul 2018, 16:14

Re: [EXPERIMENT]Keyboard latency at different debounce settings

Post by ko4 » 26 Feb 2020, 15:06

just tested the Bloody B930 at around 11ms
My test isn't accurate enough to find the winner between the logitech G pro and B930 but the linear switches on the B930 are a big step up from the Romer-G's. They are really smooth and light which might make the B930 feel faster even though the object latency is around the same

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