- return non-negative number if an error occurs - only print timing in the error case if requested
- return non-negative number if an error occurs
- only print timing in the error case if requested

28msec/zorba,cezarfx/zorba,28msec/zorba,bgarrels/zorba,cezarfx/zorba,28msec/zorba,28msec/zorba,bgarrels/zorba,bgarrels/zorba,bgarrels/zorba,28msec/zorba,cezarfx/zorba,cezarfx/zorba,cezarfx/zorba,cezarfx/zorba,28msec/zorba,bgarrels/zorba,cezarfx/zorba,28msec/zorba,bgarrels/zorba,bgarrels/zorba,cezarfx/zorba,28msec/zorba,cezarfx/zorba,cezarfx/zorba,bgarrels/zorba,28msec/zorba