[LLVMbugs] [Bug 14026] New: With large tuple size(60) clang much slower than gcc

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=14026

             Bug #: 14026
           Summary: With large tuple size(60) clang much slower than gcc
           Product: clang
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: C++11
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: cppljevans at gmail.com
                CC: dgregor at apple.com, llvmbugs at cs.uiuc.edu
    Classification: Unclassified


Created attachment 9308
  --> http://llvm.org/bugs/attachment.cgi?id=9308
contains all files needed to run test, and test output (.txt) file.

Using 2 different implementations of tuple, at large tuple size (60),
the clang compiler is more than 3 times slower than gcc.

The benchmark was run with a python program, tuple_benchmark_run.py
in the attached zip file.

The timing output is in the *.time.txt file in the zip file.
The make was used to run the .py file, and the output of that
make command also incuded in the *.compilation file.

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