On Oct 12, 2011, at 3:50 PM, Jan Kratochvil wrote: > Hi, > > dropping the optional DWARF attribute DW_AT_sibling has only advantages and no > disadvantages: > > For files with .gdb_index GDB initial scan does not use DW_AT_sibling at all. > For files without .gdb_index GDB initial scan has 1.79% time _improvement_. > For .debug files it brings 3.49% size decrease (7.84% for rpm compressed > files). > > I guess DW_AT_sibling had real performance gains on CPUs with 1x (=no) clock > multipliers. Nowadays mostly only the data size transferred over FSB matters. > > I do not think there would be any DWARF consumers compatibility problems as > DW_AT_sibling has always been optional but I admit I have tested only GDB.
I fear that this may degrade performance of other debuggers. What about adding a command line option ? Tristan.
