performance drop on LINUX with PSET in v4.2

[Herve]

"Debug > Purge C++ Libraries" didn't change anything...

So I started from scratch by reinstalling v4.1 in another directory and rebuilding; did the same for v4.2; no change — performance still favors v4.1 for PSET.

[ahenry3068]

"Debug > Purge C++ Libraries" didn't change anything...

So I started from scratch by reinstalling v4.1 in another directory and rebuilding; did the same for v4.2; no change — performance still favors v4.1 for PSE 

   A few things.
  ------------------

      First,  I'm not doubting your symptoms. 

      Second,   write a little short program that doesn't do anything but say a couple , few million Psets and times it.
       Include as little other code in this program as possible.    
       (things interweave in unpredictable ways sometimes,  this will verify IT IS PSET !)

       Third,  Consider doing whatever your doing with PSET with _memimage, _memput instead
        This takes a bit of code modification but is a faster way to do it to begin with !

[SpriggsySpriggs]

"Debug > Purge C++ Libraries" didn't change anything...

So I started from scratch by reinstalling v4.1 in another directory and rebuilding; did the same for v4.2; no change — performance still favors v4.1 for PSE 

   A few things.
  ------------------

      First,  I'm not doubting your symptoms. 

      Second,   write a little short program that doesn't do anything but say a couple , few million Psets and times it.
       Include as little other code in this program as possible.    
       (things interweave in unpredictable ways sometimes,  this will verify IT IS PSET !)

       Third,  Consider doing whatever your doing with PSET with _memimage, _memput instead
        This takes a bit of code modification but is a faster way to do it to begin with !

I can attest that _MEMIMAGE is way faster than PSET, by far.