Am 15.12.2018 um 17:12 schrieb Florian Klämpfl:
> The memory manager itself pools already, so no need for the compiler. If
> somebody wants to improve the heap manager:
> implement OS supported re-allocations (OS can move memory by just shuffling
> pages).
Very much agree, it's not a user program's job to work around the standard
memory manager in daily use. Doing that is a C++-ism that shouldn't exist in a
sane environment ;-)
I just tested something, and I'm a surprised by how big the difference is. This
simple test is 1.5 times slower in FPC/trunk/win32 than Delphi 2007 and 2.8
times slower for instances of TComponent. Medium-size GetMemory (I tested 123
bytes) is 22 times slower in FPC.
Looks like there is quite some potential there.
const COUNT=10000;
var
t1, t2: dword;
objs: array[0..10000] of TObject;
i, j: integer;
begin
t1:= Gettickcount;
for i := 0 to COUNT - 1 do begin
for j := 0 to high(objs) do
objs[j]:= TObject.Create;
for j := 0 to high(objs) do
objs[j].Free;
end;
t2:= Gettickcount;
writeln((t2-t1)/COUNT:10:3, 'ms');
Readln;
end.
--
Regards,
Martok
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