posts/2020/debouncing-queue/

[utterances-bot]

Debouncing Execution of Jobs in a Queue

Debouncing is a commonly discussed concept in a frontend interview. This post discusses how it is crucial in its own sense, and how we used it while building one of our products at upGrad.

https://mohitkarekar.com/posts/2020/debouncing-queue/

[bhaveshbh]

Nice to see such good explanation of the concept which have been there for ages on the firmware side, and now have been implemented in various other areas.

[mohitk05]

Thanks @bhaveshbh. I wasn't aware of this but I can imagine now where it would be useful. What is the simplest implementation of debounce on the firmware side, if you had to share one?

[santileortiz]

In the firmware context a common example are physical buttons. When you push a button and a signal is supposed to go "on" it actually oscillates between on/off before stabilizing. Because the processor is much faster than the time it takes for the button to stop "bouncing", you normally add a timeout to skip the noisy part and read a clean value after some delay. In electronics, and for buttons specifically, an alternate technique is to add a capacitor in parallel, which smooths out the noise.

In any case, choosing the delay value or the capacitor's value is mostly guesswork specific to the button used. I think choosing the delay on queue debouncing is also like that. A long delay throttles the rate at which requests are processed, but a short one floods the server with requests.