On Tue, May 20, 2003 at 04:33:31PM +0200, Leopold Toetsch wrote:
> In perl.perl6.internals, I wrote:
> > When looking at classes/*.c struct _vtable temp_base_vtable {} by far
> > the most vtable methods are unused or uncovered by opcodes:
>
> Some more details (vtbc.pl is below):
> $ ./vtbc.pl |grep same | wc -l
> 20
> $ ./vtbc.pl |grep bignum | wc -l
> 25
> $ ./vtbc.pl |grep keyed | wc -l
> 123
>
> $ ./vtbc.pl |grep -v keyed | grep -v same | grep -v bignum
> vtable coverage
> vtable.tbl has 265 entries
> core_ops.c has 94 entries + 5 internally used
> set_number
> substr
> cmp_num
> bitwise_shl_int
> bitwise_shr_int
> set_integer
> set_string
> concatenate_native
> cmp_string
> invoke_pmc
> modulus_float
> substr_str
> repeat_int
> subtype
> get_pmc
> 166 unused
>
> - _same are intended as short cuts, when all data types are known. But
> IMHO to know what data types are involved, you have to test the PMC
> types - this is what the normal methods do anyway, so these methods
> are probably superfluous.
> - _keyed - by far the most group and IMHO will never be implemented due
> to the huge opcode count necessary to implement them.
> - _bignum will be needed
> - from above list: set_integer, set_number, set_string always use their
> _native variants so they are probably unneeded.
> Others might be missing or unneeded - who knows.
> Comments still welome
No-one commented, did they? Did anything come of this?
Nicholas Clark
