This param:
--Xlinker --export-dynamic 

slows down the entire app (check() std.xml function) by 29x on test.

Is it useful to add it on default config? Probably if you use external dl, you should add it...

andrea@ububox:~/src/xml-test$ dmd -c test.d && gcc test.o -o testgcc2 -m64 -Xlinker --export-dynamic -Xlinker --no-warn-search-mismatch -lphobos2 -lpthread -lm -lrt
andrea@ububox:~/src/xml-test$ time ./testgcc2 cities.xml

real 3m23.426s
user 3m22.901s
sys 0m0.276s

andrea@ububox:~/src/xml-test$ dmd -c test.d && gcc test.o -o testgcc2 -m64 -Xlinker --no-warn-search-mismatch -lphobos2 -lpthread -lm -lrt
andrea@ububox:~/src/xml-test$ time ./testgcc2 cities.xml

real 0m7.433s
user 0m7.316s
sys 0m0.112s

Il giorno mer, 18/01/2012 alle 15.43 +0100, Trass3r ha scritto:
> dmd -c test.d && gcc test.o -lphobos2 -lrt -lpthread -o testgcc
> vs
> dmd -c test.d && dmd test.o -oftestd

Well dmd test.d calls
gcc test.o -o test -m64 -Xlinker -L/dmd/linux/lib64 -Xlinker  
-L/dmd/linux/lib32 -Xlinker --no-warn-search-mismatch -Xlinker  
--export-dynamic -lphobos2 -lpthread -lm -lrt