> > Àngel, you're inserting into locals TInProcessList and TRefList, so 

> > basically the

> > manual version always works against empty containers. I've changed the 

> > code so that these containers are moved out of insert and into main just 

> > as is the case with elMIContainer (code attached). With this change I 

> > compiled the code with GCC 3.2 for Cygwin and the following settings:

> > -O3 -DNDEBUG -finline-functions -Wno-inline -ftemplate-depth-128

> > and obtained a RATIO of ~0.28.

Perfect, now multi-index version is quite faster, specially with -O3 flag.

Thank you very much 

Àngel Suñé Martí