[Issue 9783] New: tracing of recursive function calls yields bad timing

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=9783

           Summary: tracing of recursive function calls yields bad timing
           Product: D
           Version: unspecified
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: druntime
        AssignedTo: nobody at puremagic.com
        ReportedBy: r.sagitario at gmx.de


--- Comment #0 from Rainer Schuetze <r.sagitario at gmx.de> 2013-03-22 02:47:23 PDT ---
Compiling this code:

int foo(int n)
{
    if (n <= 0)
        return 0;
    return foo(n-1) + foo(n-2);
}

void main()
{
    foo(30);
}

with "dmd -profile test.d" and exceuting it yields a trace.log containing

  Num          Tree        Func        Per
  Calls        Time        Time        Call

4356617     4337248      201989           0     int test.foo(int)
      1      201989           0           0     _Dmain

that reports that the tree time of foo was a lot larger than the tree time of
its only caller.

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