Why my self-defined QSys component does not have the same speed as on-chip memory ?

Thank you very much for you reply.

That code is not the final version, it is used only for checking out the maximum speed can this ip reach, the register "bc" must have problem, but I think it should be OK for testing now. Actually I don't really need burst, what I want is to make my ip can be fast as on-chip memory ip, and the counter is only for test too, I just want to PC program can receive some data to verify the ip is working. Following is the code, can you help me to modify it to make it fast? Thank you.

reg [31:0] mydata;

reg [7:0] bc, bc1, bc2, bc3, bc4;

always @(posedge clock)

begin

if (!resetn)

begin

mydata <= 0;

avalon_readdatavalid <= 1'b0;

end

else

begin

if (avalon_read)

begin

bc <= avalon_burstcount;

end

else

begin

//avalon_readdatavalid <= 1'b0;

end

if (bc > 32'h0)

begin

mydata <= mydata + 1;

avalon_readdatavalid <= 1'b1;

bc <= bc - 1;

end

else

avalon_readdatavalid <= 1'b0;

end

end