BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  some STL questions          BorlandTalk.com Forum Index -> C++ Builder (Non-Technical) View previous topic :: View next topic   Author Message Mike Margerum Guest Posted: Wed Mar 22, 2006 8:03 pm    Post subject: some STL questions I'm building an app in BCB6 that uses from pretty huge stl maps, vectors, and lists. Has anyone had any problem using these constructs with 30,000 plus objects in them? Would BDS 2006 new memory manager make the STL faster and/or more efficient? Which STL implementation is BDS 2006 using? thx for the help Back to top AlisdairM Guest Posted: Wed Mar 22, 2006 8:03 pm    Post subject: Re: some STL questions Mike Margerum wrote: Quote: I'm building an app in BCB6 that uses from pretty huge stl maps, vectors, and lists. Has anyone had any problem using these constructs with 30,000 plus objects in them? Would BDS 2006 new memory manager make the STL faster and/or more efficient? The new memory manager makes VCL-heavy code much faster. My results with STL performance have been mixed at best. This is largely due to Dinkumware relying on stronger inliners in other compilers to reduce the abstraction penalty - so vector::iterator will not be a pointer, even in release mode. It will be a distinct class type, which gives better static type checking, and (optionally) runtime checks. We have no serious benchmarks yet (from our own code) but most of our number crunching is handled in 3rd party DLLs these days. Generally we are seeing similar performance with a little tuning, but the only significant improvements are in certain VCL controls (such as TListView) At least for our apps - YMMV as always. Quote: Which STL implementation is BDS 2006 using? Dinkumware. -- AlisdairM(TeamB) Back to top Chris Uzdavinis (TeamB) Guest Posted: Wed Mar 22, 2006 8:03 pm    Post subject: Re: some STL questions Mike Margerum <junk (AT) mail (DOT) com> writes: Quote: I'm building an app in BCB6 that uses from pretty huge stl maps, vectors, and lists. Has anyone had any problem using these constructs with 30,000 plus objects in them? Would BDS 2006 new memory manager make the STL faster and/or more efficient? It really depends on how you use it. What opeartions, and on which data structures, are too slow for you? Every data structure has different performance requirements for the various operations. For example, inserts, deletes, and lookups are the common operations, and their runtime complexity depends on the data structure. There are optimizations you can do to greatly help. For one example, inserting things into a vector one-at-a-time can be very slow if you insert a lot of items without reserving memory in advance for the number of elements you need to insert. Quote: Which STL implementation is BDS 2006 using? Dinkumware. -- Chris (TeamB); Back to top Mike Margerum Guest Posted: Wed Mar 22, 2006 9:03 pm    Post subject: Re: some STL questions I'm mostly concerned with possible bugs in the BCB 6 STL implementation with that many items. I really haven't had any performance issues so far. Quote: Which STL implementation is BDS 2006 using? Dinkumware. That's another reason to upgrade. Thanks! Back to top Mike Margerum Guest Posted: Wed Mar 22, 2006 9:03 pm    Post subject: Re: some STL questions Quote: The new memory manager makes VCL-heavy code much faster. My results with STL performance have been mixed at best. This is largely due to Dinkumware relying on stronger inliners in other compilers to reduce the abstraction penalty - so vector::iterator will not be a pointer, even in release mode. It will be a distinct class type, which gives better static type checking, and (optionally) runtime checks. Thanks for the info. Back to top Arnie Guest Posted: Thu Mar 23, 2006 9:03 pm    Post subject: Re: some STL questions "Mike Margerum" <junk (AT) mail (DOT) com> wrote in message news:44219a48 (AT) newsgroups (DOT) borland.com... Quote: I'm building an app in BCB6 that uses from pretty huge stl maps, vectors, and lists. Has anyone had any problem using these constructs with 30,000 plus objects in them? Would BDS 2006 new memory manager make the STL faster and/or more efficient? Which STL implementation is BDS 2006 using? thx for the help We have both vectors and maps or sets with up to about 18,000,000 items in them in BCB 5 (Roguewave) and VC++8 (Dinkumware). No problems except occasionally running out of memory These are DB apps that cache some of the columns from some very large tables. - Arnie Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         BorlandTalk.com Forum Index -> C++ Builder (Non-Technical) All times are GMT Page 1 of 1   Jump to: Select a forum C++ Builder Newsgroups----------------C++ BuilderC++ Builder (ActiveX)C++ Builder (Announcements)C++ Builder (Command Line Tools)C++ Builder DatabasesC++ Builder Databases (ADO)C++ Builder Databases (Desktop)C++ Builder Databases (InterBase Express)C++ Builder Databases (Multi-Tier)C++ Builder Databases (SQL Servers)C++ Builder (Graphics)C++ Builder (IDE)C++ Builder (Internet)C++ Builder (Internet Socket)C++ Builder (Internet Web)C++ Builder (Jobs)C++ Builder (Language)C++ Builder (Language C++)C++ Builder (Compatibility with MFC)C++ Builder (Native API)C++ Builder (Non-Technical)C++ Builder (Students)C++ Builder (Third Party Tools)C++ Builder (Upgrade)C++ Builder (VCL)C++ Builder (VCL Components Usage)C++ Builder (VCL Components Development)C++ Builder (VCL Usage)C++ Builder (WinAPI)C++ Builder Installation Delphi Newsgroups----------------Delphi (General)Delphi ActiveX Controls UsageDelphi ActiveX Controls DevelopmentDelphi As400Delphi DatabasesDelphi Databases (ADO)Delphi Databases (dbExpress)Delphi Databases (Desktop)Delphi Databases (InterBase Express)Delphi Databases (Multi-Tier)Delphi Databases (SQL Servers)Delphi DeploymentDelphi GraphicsDelphi IDEDelphi InternationalizationDelphi InternetDelphi Internet Isapi-WebBrokerDelphi Internet WebSnapDelphi Internet WinsockDelphi JobsDelphi Language BASMDelphi Language ObjectPascalDelphi Model Driven Architecture (General)Delphi Model Driven Architecture (Third Party)Delphi MultimediaDelphi Native APIDelphi Non-TechnicalDelphi ObjectPascalDelphi OLE AutomationDelphi OO designDelphi OpenToolsAPIDelphi Reporting-ChartingDelphi RTLDelphi StudentsDelphi TeamSourceDelphi Thirdparty ToolsDelphi Thirdparty Tools (General)Delphi Thirdparty Tools (IntraWeb)Delphi Thirdparty Tools (RaveReports)Delphi UpgradeDelphi VCLDelphi VCL ComponentsDelphi VCL Components UsingDelphi VCL Components WritingDelphi WebServices SOAPDelphi WinAPIDelphi XMLDelphi Installationcomp.lang.pascal.delphi.components.misccomp.lang.pascal.delphi.components.usagecomp.lang.pascal.delphi.components.writingcomp.lang.pascal.delphi.databasescomp.lang.pascal.delphi.misccomp.sources.delphi JBuilder Newsgroups----------------JBuilderJBuilder AnnouncementsJBuilder Applet IssuesJBuilder As400JBuilder CompilerJBuilder CORBA/RMIJBuilder DatabasesJBuilder DB SwingJBuilder DebuggerJBuilder DeploymentJBuilder DocumentationJBuilder EnterpriseJBuilder HandheldJBuilder IDEJBuilder JavaJBuilder JavaAPIJBuilder Java LanguageJBuilder Java SwingJBuilder Java BeansJBuilder Java Beans UsageJBuilder Java Beans DevelopmentJBuilder JBCLJBuilder JDataStoreJBuilder JobsJBuilder LinuxJBuilder MacintoshJBuilder & MobileSetJBuilder MultiLingual AppsJBuilder Non-TechnicalJBuilder OpenToolsJBuilder Servlets (JSP)JBuilder StudentsJBuilder Team DevelopmentJBuilder Thirdparty ToolsJBuilder UpgradeJBuilder Installation InterBase Newsgroups----------------InterBaseInterBase Bug DiscussionInterBase GeneralInterBase IBConsoleInterBase OpenSourceInterBase ReplicationInterBase SQLInterBase ThirdpartyInterBase Installation Miscellaneous Borland Newsgroups----------------AppCenterAppServerEnteraVisiBroker  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Powered by phpBB © 2001, 2006 phpBB Group SEO toolkit © 2004-2006 webmedic.