gistfile1.txt

        private struct ProcessIndex : System.IEquatable<ProcessIndex>
        {
            public Segment seg;
            public int i;

            public bool Equals(ProcessIndex other)
            {
                return this.seg == other.seg && this.i == other.i;
            }

            public override bool Equals(object other)
            {
                if(other is ProcessIndex)
                    return Equals((ProcessIndex)other);
                return false;
            }

            public override int GetHashCode()
            {
                int hash = 23;
                hash = hash * 31 + (int)seg;
                hash = hash * 31 + i;
                return hash;  
            }
        }
    
    ...    
        
    public enum Segment : int
    {
        Update = 0,
        FixedUpdate = 1,
        LateUpdate = 2,
        SlowUpdate = 3,
    }