At what point will the matchmaking search for a player pair?.

A matchmaking pair for a player is usually searched for when the player is ready to start the game and sends a request to find an opponent. In Go systems, this can be the moment when a request is received from the client, after which a matching algorithm is triggered to find a suitable opponent in the queue.

Often, pair searching occurs either immediately upon receiving the request or periodically (for example, via a ticker), when the system checks for available players in the queue. It is important that the search is asynchronous and does not block the main thread, so goroutines and channels are often used for matchmaking processing.

An example of a simplified approach in Go:

func findMatch(player Player, queue chan Player) {
    select {
    case opponent := <-queue:
        // found an opponent
        startGame(player, opponent)
    default:
        // add player to the queue
        queue <- player
    }
}

Thus, the pair search occurs either at the moment of processing the matchmaking request or during periodic queue checks.