DisableRecompile.cs

using UnityEditor;

[InitializeOnLoad]
public class DisableRecompile {
    static bool waitingForStop = false;

    static DisableRecompile() {
        EditorApplication.update += OnEditorUpdate;
    }

    static void OnEditorUpdate() {
        if (!waitingForStop
            && EditorApplication.isCompiling
            && EditorApplication.isPlaying) {
            EditorApplication.LockReloadAssemblies();
            EditorApplication.playModeStateChanged
                 += PlaymodeChanged;
            waitingForStop = true;
        }
    }

    static void PlaymodeChanged(PlayModeStateChange stateChange) {
        if (EditorApplication.isPlaying)
            return;

        EditorApplication.UnlockReloadAssemblies();
        EditorApplication.playModeStateChanged
             -= PlaymodeChanged;
        waitingForStop = false;
    }
}