Prototype Design Pattern

✅ Definition Prototype Pattern = Create new objects by cloning an existing object instead of creating from scratch, which improves performance by avoiding repeated expensive initialization, reduces CPU work, and allows reuse of preconfigured object state. 🤔 Why use it? Used when object creation is slow, complex, or repeated, and you want to reuse an existing object as a template instead of rebuilding it every time.

📊 Comparison

Aspect	Without Prototype (new)	With Prototype (clone)
Creation	Build from scratch	Copy existing
Speed	❌ Slow	✅ Fast
CPU	❌ High	✅ Low
Memory	✅ Same	✅ Same
Use case	Simple objects	Complex/expensive objects
Risk	✅ Safe	⚠️ Copy issues

---

🔁 Shallow vs Deep Copy

Type	Description	Speed	Risk
Shallow	Copies references	✅ Fast	❌ Shared data
Deep	Full independent copy	❌ Slower	✅ Safe

var r1 = new Report();

var r2 = new Report(); // expensive again

using System;

class Report : ICloneable

{

    public string Data;

    public Report()

    {

        Console.WriteLine("Expensive creation...");

    }

    public object Clone()

    {

        return this.MemberwiseClone();

    }

}

// Usage

var original = new Report();

var copy1 = (Report)original.Clone();

var copy2 = (Report)original.Clone();

public object Clone()

{

    return new Report

    {

        Data = this.Data

    };

}