[Entitas:] New ReactiveSystem to process only one entity

The current ReactiveSystem passes in a list of entities and you probably end up writing code like this

public override void Execute(List<Entity> entities) {
    foreach(var e in entities) {
        // Do sth
    }
}

The idea of having another ReactiveSystem like the following came up again

public override void Execute(Entity entity) {
    // Do sth
}

Any thoughts? Would you use that?

[sschmid]

@JuDelCo It would be an addition, not a replacement. The list approach is the most flexible and fits well with the Entitas idea of aggregation. The other approach on the other is a veeery common use-case I guess.

[sschmid]

It would be a separat system. Another reason to add this new system is performance. Currently you iterate once to filter, than you iterate to execute. With a single entity system we could save 1x iteration which might be noticeable when having thousands of systems.