[cfe-dev] Clang: How to Analyse Compiletime of Templates?

[Dennis Luehring via cfe-dev]

-ftime-trace Option gives this error on both Project properties

VStudio Project properties
   Configuration Properties -> C/C++ -> Command Line
   Configuration Properties -> LLVM -> Additional Compiler Options

the very same LLVM/clang-cl installation works with -ftime-trace on a
much bigger project of my colleague


Am 09.03.2020 um 08:54 schrieb Dennis Luehring via cfe-dev:
> i get this assertion (using latest Windows
> Build(https://llvm.org/builds/) installer + VStudio extension)
>
> 1>Assertion failed: TimeTraceProfilerInstance == nullptr && "Profiler
> should not be initialized", file
> C:\src\llvm_package_2663a25f\llvm-project\llvm\lib\Support\TimeProfiler.cpp,
> line 253
> 1>Stack dump:
>
> assert in Function: void timeTraceProfilerInitialize(unsigned
> TimeTraceGranularity)
>
>
>
> Am 05.03.2020 um 20:22 schrieb Alexandre Ganea:
> > Hi Dennis,
> >
> > Along with -ftime-trace, try either:
> > - Clang Build Analyzer: https://aras-p.info/blog/2019/09/28/Clang-Build-Analyzer/
> > - See++ Compiler Profiler: https://github.com/Viladoman/SeeProfiler
> >
> >
> > -----Message d'origine-----
> > De : cfe-dev <cfe-dev-bounces at lists.llvm.org> De la part de Dennis Luehring via cfe-dev
> > Envoyé : March 5, 2020 2:16 PM
> > À : cfe-dev at lists.llvm.org
> > Objet : [cfe-dev] Clang: How to Analyse Compiletime of Templates?
> >
> > hello clang-devs,
> >
> > is clang able to help me to finde the most compiletime consuming templates in a 500KLOC app which uses a huge template library - something like a overview what templates are reasonable to optimize (in my case hide the template behind a specialized interface)
> >
> > i've read about /ftime
> >
> > https://aras-p.info/blog/2019/01/16/time-trace-timeline-flame-chart-profiler-for-Clang/
> >
> > but that seems no to help with template instanciation
> >
> > any advice?
> >
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>
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