Concatenate 10,000 strings: ASPX (VB, StringBuilder)
<%@ Page language="VB" debug="false" %>
<%
Response.Write("Start "+CSTR(NOW())+"<br>")
DIM i AS Integer,nStart AS Double
DIM s AS System.Text.StringBuilder
s=NEW System.Text.StringBuilder(10000)
nStart=TIMER
FOR j=1 TO 10
  s.Remove(0,s.Length)
  FOR i=1 TO 20000
    s.Append(CSTR(i))
  NEXT
NEXT
Response.Write("Done "+((TIMER-nStart)/10).ToString()+"
"+CSTR(LEN(s.ToString()))+" 20,000<br>")
%>
On 850 MHz PIII: 0.026 seconds