Faster Display

I am reading a stl file and converting the triangles into TopoDS shape as mentioned in the code below. But displaying the triangles(after being converted to shape)takes a lot of time.(see Display function below). Is there anyway to display it faster?
Thanx in advance
sonu khans

In some message handler
//Displays triangles from stl file
TopoDS_Edge e1, e2, e3;

TopoDS_Vertex Vertex1, Vertex2, Vertex3;

TopoDS_Shell MyShell;

TopoDS_Face MyFace;

TopoDS_Wire MyWire;

BRep_Builder MyBrep;

MyBrep.MakeShell(MyShell);
BRep_Builder builder;
TopoDS_Compound Comp;

builder.MakeCompound(Comp);
char str[40],ch;

double vertex[3][3];

int i=0,j=0,k = 1,l=0;

int counter = 0, disp_counter = 0;

//assert(i == 1);

CMainFrame *frm_wnd = GetApplicationFrame();

ifstream input("D:\\temp1.stl");

if(!input)

{

cout << "cannot open file.\n";

}

if(input)

{

do

{

input.get(str, 40, 'x');

input.get(ch);

if(ch == 'x')

{

l+=1;

for(j = 0; j < 3; j++)

{

if(j!=0)

input.get(ch);

for(i = 0; i < 3; i++)

{

input.get(ch);

if(i!=2)

input.get(str, 40, ' ');

else

input.get(str, 40, '\n');

vertex[j][i] = atof(str);

// cout <<"v:" << vertex[j][i]<<endl;

}

// cout << endl;

input.get(str, 40, 'x');

}

gp_Pnt P1(vertex[0][0],vertex[0][1],vertex[0][2]);

gp_Pnt P2(vertex[1][0],vertex[1][1],vertex[1][2]);

gp_Pnt P3(vertex[2][0],vertex[2][1],vertex[2][2]);

Vertex1 = BRepBuilderAPI_MakeVertex(P1);

Vertex2 = BRepBuilderAPI_MakeVertex(P2);

Vertex3 = BRepBuilderAPI_MakeVertex(P3);

e1 = BRepBuilderAPI_MakeEdge(Vertex1,Vertex2);

e2 = BRepBuilderAPI_MakeEdge(Vertex2,Vertex3);

e3 = BRepBuilderAPI_MakeEdge(Vertex1,Vertex3);

MyWire = BRepBuilderAPI_MakeWire( e1, e2, e3);

MyFace = BRepBuilderAPI_MakeFace( MyWire);

MyBrep.Add(MyShell,MyFace);

}

}while((ch = input.get()) != EOF);
input.close();

}
TopoDS_Shape myShape = BRepBuilderAPI_MakeSolid(MyShell);
m = new AIS_Shape(myShape);
//$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ myAISContext->Display(m);
//This statement execution takes lot of time.
//$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$