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kotlinlang

Hello guys. I’m trying to understand `workerGroupSize` and `callGroupSize` from `io.ktor.server.engine.ApplicationEngine.Configuration` but unable to make sense of it. Can someone dumb it down for me?
```        /**
         * Specifies size of the event group for processing connections, parsing messages and doing engine's internal work
         */
        public var workerGroupSize: Int = parallelism / 2 + 1

        /**
         * Specifies size of the event group for running application code
         */
        public var callGroupSize: Int = parallelism```