dmd 2.063 generated code a lot slower then dmd 2.062

[Benjamin Thaut]

I just upgraded from dmd 2.062 to dmd 2.063.2 and I see that the code 
dmd 2.063.2 generates in debug mode is significantly slower then the 
code generated by dmd 2.062. Have there been changes to the debug mode 
that affect execution speed? Like additional debug checks?

Kind Regards
Benjamin Thaut