IC.CoolWatermark.dll vs Graphics - perfomance speed

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C#

ASP.NET

Hi,

i need to watermark on images.

i did it in two way.

first method,

using IC.CoolWatermark.dll

string WaterMarkText = "Comp Name"; // watermark text
System.Drawing.Image bitmap = System.Drawing.Image.FromStream(stream); // got image from database

IC.CoolWatermark.Writer writer = new Writer(bitmap);
writer.PositionStyle = PositionStyle.MiddleCenter;
writer.Shadow = new Shadow(Color.Transparent, 0, 0);
writer.FontStyle = FontStyle.Regular;
writer.Border = new Border(Pens.Gray);
writer.FontFamily = new FontFamily("Cambria");
writer.FontSize = watermarkfontsize(writer.Image.Width);
writer.Colors[0] = Color.Transparent;
IC.CoolWatermark.Shape shape = new IC.CoolWatermark.Shape();
shape.ShapeStyle = IC.CoolWatermark.ShapeStyle.ShearVertical;
writer.Shape = shape;
writer.Angle = 320;
bitmap = new Bitmap(writer.WriteText(WaterMarkText));

MemoryStream oStream = new MemoryStream();
bitmap.Save(oStream, System.Drawing.Imaging.ImageFormat.Png);
context.Response.BinaryWrite(oStream.ToArray());
bitmap.Dispose();

second way:

using " System.Drawing.Graphics"


string path = context.Server.MapPath("~/Image/water_02.png"); // watermark image

Bitmap _watermarkImage = new Bitmap(path); // watermark image
Bitmap _baseImage = new Bitmap(stream); // image from database which should overlap with watermark image

//Draw the watermark offset 10 pixels from the left and 10 pixels from the top of the base image.

Graphics canvas = Graphics.FromImage(_baseImage);


canvas.DrawImage(_watermarkImage,new Rectangle(20, 10, _watermarkImage.Width, _watermarkImage.Height), 0, 10,

_watermarkImage.Width,

_watermarkImage.Height,

GraphicsUnit.Pixel);
canvas.Save();
_baseImage.Save(context.Response.OutputStream, ImageFormat.Jpeg);

//clean up
_baseImage.Dispose();
canvas.Dispose();

In first method, i am writing text using IC.CoolWatermark.dll. But in sencod method i am drawing image to get overlapped two images together.

Both are works. But which one is best in order performance wise. which one i can use for my project?

Thanks!