Re: [fpc-pascal] How to avoid Copy
On Dec 29, 2023 9:50 PM, Adriaan van Os wrote:Amir--- via fpc-pascal wrote: > Hi all, > > I have a List of record, where the record has a WideString field. > I have some code like the following: > > function check(constref v: TMyRecord; data: TListOfMyRecord): Boolean; > var > r: TMyRecord; > > begin > Result := False; > for r in data do > if r.State = v.State then > Exit(True); > end; > > I call this method a lot and the CPU profiling shows a lot of cpu time > spent on "fpc_copy_proc" (which I assume is doing the deep copy on > records) from "TCustomListEnumerator.GetCurrent". > I considered other alternatives like using enumerators but they all need > a to return a record (and hence copying the widestring field). > I can think of two solutions to get rid of the wasting(!) so much time > on "fpc_copy_proc": > 1) Changing the TMyRecord to TMyClass. But then I need to Create and > Free a "lot" of objects. > 2) Update TListOfMyRecord to TListOfPointerToMyRecord. This requires a > "lot" of memory allocation/fragmentation. > > Is there a better solution? Pass the data parameter by reference.This means I need to have a ListOfMyRecord and a ListOfConstRefMyRecord, right? Regards, Adriaan van Os ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org https://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] How to avoid Copy
Amir--- via fpc-pascal wrote: Hi all, I have a List of record, where the record has a WideString field. I have some code like the following: function check(constref v: TMyRecord; data: TListOfMyRecord): Boolean; var r: TMyRecord; begin Result := False; for r in data do if r.State = v.State then Exit(True); end; I call this method a lot and the CPU profiling shows a lot of cpu time spent on "fpc_copy_proc" (which I assume is doing the deep copy on records) from "TCustomListEnumerator.GetCurrent". I considered other alternatives like using enumerators but they all need a to return a record (and hence copying the widestring field). I can think of two solutions to get rid of the wasting(!) so much time on "fpc_copy_proc": 1) Changing the TMyRecord to TMyClass. But then I need to Create and Free a "lot" of objects. 2) Update TListOfMyRecord to TListOfPointerToMyRecord. This requires a "lot" of memory allocation/fragmentation. Is there a better solution? Pass the data parameter by reference. Regards, Adriaan van Os ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org https://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
[fpc-pascal] How to avoid Copy
Hi all, I have a List of record, where the record has a WideString field. I have some code like the following: function check(constref v: TMyRecord; data: TListOfMyRecord): Boolean; var r: TMyRecord; begin Result := False; for r in data do if r.State = v.State then Exit(True); end; I call this method a lot and the CPU profiling shows a lot of cpu time spent on "fpc_copy_proc" (which I assume is doing the deep copy on records) from "TCustomListEnumerator.GetCurrent". I considered other alternatives like using enumerators but they all need a to return a record (and hence copying the widestring field). I can think of two solutions to get rid of the wasting(!) so much time on "fpc_copy_proc": 1) Changing the TMyRecord to TMyClass. But then I need to Create and Free a "lot" of objects. 2) Update TListOfMyRecord to TListOfPointerToMyRecord. This requires a "lot" of memory allocation/fragmentation. Is there a better solution? Best, Amir ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org https://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Daily snapshots?
Thank you. That's what I've been looking for. Maybe the documentation at https://www.freepascal.org/docs-html/user/userse76.html could be updated regarding the new URL? @Nico: Thanks for pointing me to Docker images, but I do not have Docker support on my Windows, unfortunately. I furthermore fear that it might be complicated to use a dockerized Lazarus. Is there something special I have to consider when combining FPC-trunk with Lazarus 3.0? I'd like to replace the provided FPC 3.2.2 with the latest trunk snapshot. I guess I have to recompile all packages? Is there something else I need to do? Thank you, kind regards, Thomas - Original Message - From: Marco van de Voort via fpc-pascal To: fpc-pascal@lists.freepascal.org Sent: Friday, December 29, 2023, 12:37:54 Subject: [fpc-pascal] Daily snapshots? Op 27/12/2023 om 12:38 schreef Thomas Kurz via fpc-pascal: > as it seems to take longer for the next major release, I'd appreciate if > automated snapshots could be provided either daily or weekly. > In the documentation, I found a link to > ftp://ftp.freepascal.org/pub/fpc/snapshot/trunk/ but I cannot login. I tried > with user=anynous and password=my-email-address. > I don't mind the long time for the next release, but it'd help enormously to > have the option to download an up-to-date nightly build :) The FTP site has been converted to http because many browsers deprecated the FTP protocol, try http://downloads.freepascal.org/fpc/snapshot/fixes/ ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org https://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org https://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Daily snapshots?
Op 27/12/2023 om 12:38 schreef Thomas Kurz via fpc-pascal: as it seems to take longer for the next major release, I'd appreciate if automated snapshots could be provided either daily or weekly. In the documentation, I found a link to ftp://ftp.freepascal.org/pub/fpc/snapshot/trunk/ but I cannot login. I tried with user=anynous and password=my-email-address. I don't mind the long time for the next release, but it'd help enormously to have the option to download an up-to-date nightly build :) The FTP site has been converted to http because many browsers deprecated the FTP protocol, try http://downloads.freepascal.org/fpc/snapshot/fixes/ ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org https://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Daily snapshots?
Hi Thomas, in case your platform allows to use Container images [1], you might give the Container images of FPC [2] a try. The beta image is for the next released version of FPC (fixes_3_2 branch) while the trunk/nightly uses the main branch. Depending on the image version you only need to download between 180 and 313 megabytes (the slim images with <50 megabytes are only built for released versions) [3, 4] and it's fully separated from your system installation. You can also use the Dockerfile locally to build the image on your own host. The trunk/nightly image is build every 2nd day-the-week while the beta image is currently only build on the 15th of each month (since there were almost no changes in the past). If a higher frequency is required, its not a problem - just let me know and I'll be changing the schedule. [1]: https://wiki.freepascal.org/Official_Docker_Images [2]: https://gitlab.com/freepascal.org/fpc/docker [3]: https://hub.docker.com/r/freepascal/fpc [4]: https://gitlab.com/freepascal.org/fpc/docker/container_registry/2747086 Kind regards Nico On 12/27/23 12:38, Thomas Kurz via fpc-pascal wrote: Hello, as it seems to take longer for the next major release, I'd appreciate if automated snapshots could be provided either daily or weekly. In the documentation, I found a link to ftp://ftp.freepascal.org/pub/fpc/snapshot/trunk/ but I cannot login. I tried with user=anynous and password=my-email-address. I don't mind the long time for the next release, but it'd help enormously to have the option to download an up-to-date nightly build :) Kind regards, Thomas ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org https://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org https://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
