> Polling as an example may be an effective way to lower latency, I had to learn this lesson the hard way recently. An embedded system where I had to get data

> Polling as an example may be an effective way to lower latency, I had to learn this lesson the hard way recently. An embedded system where I had to get data from a couple SPI controller’s RAM. Made a bit complicated ISR and listener system that woke up threads to do a deferred-interrupt… by the time it was all said and done with a fair bit of code, I wasn’t happy with it. I figured out that usually data would be available every 2ms and just wrote the read routine just to sleep every 2ms and attempt another read, I have it “hitting” 90% of the time and my avg latency is almost nothing. .7ms or so.