Re: [fpc-devel] TList slowness in classes
Vincent Snijders wrote: Michalis Kamburelis wrote: I felt that results of this discussion are so important that I created a page in FPC wiki about it: http://www.freepascal.org/wiki/index.php/Avoiding_implicit_try_finally_section There's an URL to mail archives of this discussion, and a small demo program that shows trick proposed by Mattias how to avoid this implicit try...finally block. (I also created Writing_efficient_code page, that links between FPC page and Avoiding_implicit_try_finally_section page). Michalis. Did you try this with today compiler? I think Peter Vreman turned of implicit try finally for resource strings. Vincent. ___ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-devel I can confirm that since the new CVS version TList is much faster than before. Also it seems arrays got faster but I'm unsure as I deleted my old benchmarks. ___ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-devel
Re: [fpc-devel] TList slowness in classes
On Fri, 24 Dec 2004, Mattias Gaertner wrote: > On Fri, 24 Dec 2004 12:13:15 +0100 (W. Europe Standard Time) > Michael Van Canneyt <[EMAIL PROTECTED]> wrote: > > > On Fri, 24 Dec 2004, Mattias Gaertner wrote: > >[...] > > > And creates the implicit exception frame only in RaiseIndexError. > > > > I have changed the procedure. > > Talking about TList slowness: > In the last years TList and TStringList became slower and slower. > Are there any alternatives in classes.pp? A simple TList providing only the > very > basics, less checks, no notifications, less virtuals, reordered IFs ... ? TList has almost no virtuals, so I doubt you will find anything to change there. The notifications can be optimized, Dean Zobec wanted to try this. This is as far as I'm concerned the biggest showstopper. If you want to make an ancestor, make it TAbstractList. But to make this work, you'll need a virtual Get() method, which is more or less what you wanted to avoid in the first place. > If this TBaseList (or TSimpleList or TQuickList or THumbleList) would > be the ancestor of TList, existing code could easily be improved - the > user only needs to rename his TList to TBaseList. > Or maybe give this base thing the correct name. I never understood, > why Borland named it 'list'. AFAIK in computer science a list is a > linked chain of elements. While TList is an dynamic array with some methods. It is. I suspect that TList is also often used in the wrong way. The basic methods (get/set) are quite small and fast. Only the growing mechanism is slow. People should set the capacity before adding anything to the list. If you don't do this, then each N calls to add() will need to do a reallocation of the whole list... Michael. ___ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-devel
[fpc-devel] gui console in windows
Hello, i am interesting, what do you think about redirecting text streams not to windows console, but creating free pascal's own gui console (for example implementing it under -WX switch)? I mean to do something like graph unit is done now or unit wincrt in Virtual Pascal's rtl. Windows console looks like some relict derived from dos. We have problems with keybord drivers and text encoding in it (text prepared with windows editor needs to be encoder to dos cp when outputing if you want to see national characters properly). Different it's implementation in win9x and win2000,xp systems makes these problems deeper. Regards, Rimgaudas Laucius ___ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-devel
RE: [fpc-devel] gui console in windows
have you tried using virtual pascals wincrt unit with freepascal? and if so does it compile and work? > -Original Message- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Behalf Of Rimgaudas > Laucius > Sent: 05 November 2004 00:07 > To: fpc-devel@lists.freepascal.org > Subject: [fpc-devel] gui console in windows > > > Hello, > > i am interesting, what do you think about redirecting text streams not to > windows console, but creating free pascal's own gui console (for example > implementing it under -WX switch)? I mean to do something like > graph unit is > done now or unit wincrt in Virtual Pascal's rtl. Windows console > looks like > some relict derived from dos. We have problems with keybord > drivers and text > encoding in it (text prepared with windows editor needs to be > encoder to dos > cp when outputing if you want to see national characters properly). > Different it's implementation in win9x and win2000,xp systems makes these > problems deeper. > > Regards, > Rimgaudas Laucius > > > ___ > fpc-devel maillist - fpc-devel@lists.freepascal.org > http://lists.freepascal.org/mailman/listinfo/fpc-devel ___ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-devel
Re: [fpc-devel] small patch for db
On Tue, 30 Nov 2004, Jesus Reyes wrote: > Tfielddefs.assign handle fielddefs starting at index 1, it should > start at index 0 > Thanks. Applied. Michael. ___ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-devel
[fpc-devel] IE 9999 on second compiler run
im posting this direct to the list as the bug report system is down www.p10link.net/iesecondcompile.tbz extract the archive with tar -jxf and run the test script. the first compile will succeed the second compile will exit with ie the problem appears to happen when loading the lcore.ppu file on the second compile of lsocket.pas ___ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-devel
[fpc-devel] bug reporting system down
Warning: Access denied for user: '[EMAIL PROTECTED]' (Using password: YES) in /FPC/html/bugs/bugs.php on line 11 Warning: MySQL Connection Failed: Access denied for user: '[EMAIL PROTECTED]' (Using password: YES) in /FPC/html/bugs/bugs.php on line 11 An error occurred while executing an mYSQL query: Access denied for user: '[EMAIL PROTECTED]' (Using password: YES) Warning: Access denied for user: '[EMAIL PROTECTED]' (Using password: NO) in /FPC/html/bugs/bugs.php on line 13 Warning: MySQL Connection Failed: Access denied for user: '[EMAIL PROTECTED]' (Using password: NO) in /FPC/html/bugs/bugs.php on line 13 Warning: MySQL: A link to the server could not be established in /FPC/html/bugs/bugs.php on line 13 An error occurred while executing an mYSQL query: Access denied for user: '[EMAIL PROTECTED]' (Using password: NO) ___ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-devel
Re: [fpc-devel] TList slowness in classes
Michalis Kamburelis wrote: I felt that results of this discussion are so important that I created a page in FPC wiki about it: http://www.freepascal.org/wiki/index.php/Avoiding_implicit_try_finally_section There's an URL to mail archives of this discussion, and a small demo program that shows trick proposed by Mattias how to avoid this implicit try...finally block. (I also created Writing_efficient_code page, that links between FPC page and Avoiding_implicit_try_finally_section page). Michalis. Did you try this with today compiler? I think Peter Vreman turned of implicit try finally for resource strings. Vincent. ___ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-devel
Re: Re: [fpc-devel] TList slowness in classes
> >Talking about TList slowness: >In the last years TList and TStringList became slower and slower. Are there >any alternatives in classes.pp? A simple TList providing only the very basics, >less checks, no notifications, less virtuals, reordered IFs ... ? I think dynamic arrays are just what you are looking for. var ii: array of integer; ss: array of string; yakov ___ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-devel
Re: [fpc-devel] TList slowness in classes
I felt that results of this discussion are so important that I created a
page in FPC wiki about it:
http://www.freepascal.org/wiki/index.php/Avoiding_implicit_try_finally_section
There's an URL to mail archives of this discussion, and a small demo
program that shows trick proposed by Mattias how to avoid this implicit
try...finally block.
(I also created Writing_efficient_code page, that links between FPC page
and Avoiding_implicit_try_finally_section page).
Michalis.
Michael Van Canneyt wrote:
On Fri, 24 Dec 2004, Mattias Gaertner wrote:
On Fri, 24 Dec 2004 11:49:10 +0100 (W. Europe Standard Time)
Michael Van Canneyt <[EMAIL PROTECTED]> wrote:
On Fri, 24 Dec 2004, Mattias Gaertner wrote:
On Fri, 24 Dec 2004 10:56:24 +0100 (W. Europe Standard Time)
Michael Van Canneyt <[EMAIL PROTECTED]> wrote:
If the answer is yes, then maybe it's safe to compile parts of FPC
sources in lists.inc (like TList.Get) inside {$IMPLICITEXCEPTIONS OFF} ?
Why not put it into a sub proc:
function TList.Get(Index: Integer): Pointer;
procedure RaiseIndexError;
begin
Error(SListIndexError,Index);
end;
begin
If (Index<0) or (Index>=FCount) then
RaiseIndexError;
Result:=FList^[Index];
end;
The compiler detects that the sub can raise an exception.
And creates the implicit exception frame only in RaiseIndexError.
I have changed the procedure.
Michael.
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