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Embed small size array elements in the heap.

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It reduces the memory consumption and sometimes improve the
performance as well.  For example, the consumed memory size
of `bench/bm_ao_render.rb` is reduced from 1.2GB to 1GB, and
its total execution time become 18.795 sec from 22.229 sec.
This commit is contained in:
Yukihiro "Matz" Matsumoto
2017-07-27 12:46:51 +09:00
parent 5d44f8582e
commit f26d00d9e8
9 changed files with 303 additions and 225 deletions
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include/mruby/array.h
+33 -7
View File
@@ -21,22 +21,48 @@ typedef struct mrb_shared_array {
mrb_value *ptr;
} mrb_shared_array;
#define MRB_ARY_EMBED_LEN_MAX ((mrb_int)(sizeof(void*)*3/sizeof(mrb_value)))
struct RArray {
MRB_OBJECT_HEADER;
mrb_int len;
union {
mrb_int capa;
mrb_shared_array *shared;
} aux;
mrb_value *ptr;
struct {
mrb_int len;
union {
mrb_int capa;
mrb_shared_array *shared;
} aux;
mrb_value *ptr;
} heap;
mrb_value embed[MRB_ARY_EMBED_LEN_MAX];
} as;
};
#define mrb_ary_ptr(v) ((struct RArray*)(mrb_ptr(v)))
#define mrb_ary_value(p) mrb_obj_value((void*)(p))
#define RARRAY(v) ((struct RArray*)(mrb_ptr(v)))
#define RARRAY_LEN(a) (RARRAY(a)->len)
#define RARRAY_PTR(a) ((const mrb_value*)RARRAY(a)->ptr)
#define MRB_ARY_EMBED 4
#define MRB_ARY_EMBED_MASK 3
#define ARY_EMBED_P(a) ((a)->flags & MRB_ARY_EMBED)
#define ARY_SET_EMBED_FLAG(a) ((a)->flags |= MRB_ARY_EMBED)
#define ARY_UNSET_EMBED_FLAG(a) ((a)->flags &= ~(MRB_ARY_EMBED|MRB_ARY_EMBED_MASK))
#define ARY_EMBED_LEN(a) ((a)->flags & MRB_ARY_EMBED_MASK)
#define ARY_SET_EMBED_LEN(a,len) (a)->flags = ((a)->flags&~MRB_ARY_EMBED_MASK) | ((len)&MRB_ARY_EMBED_MASK);
#define ARY_EMBED_PTR(a) (&((a)->as.embed[0]))
#define ARY_LEN(a) (ARY_EMBED_P(a)?ARY_EMBED_LEN(a):(a)->as.heap.len)
#define ARY_PTR(a) (ARY_EMBED_P(a)?ARY_EMBED_PTR(a):(a)->as.heap.ptr)
#define RARRAY_LEN(a) ARY_LEN(RARRAY(a))
#define RARRAY_PTR(a) ARY_PTR(RARRAY(a))
#define ARY_SET_LEN(a,n) do {\
if (ARY_EMBED_P(a)) {\
mrb_assert((n) <= MRB_ARY_EMBED_LEN_MAX); \
ARY_SET_EMBED_LEN(a,n);\
}\
else\
(a)->as.heap.len = (n);\
} while (0)
#define ARY_CAPA(a) (ARY_EMBED_P(a)?MRB_ARY_EMBED_LEN_MAX:(a)->as.heap.aux.capa)
#define MRB_ARY_SHARED 256
#define ARY_SHARED_P(a) ((a)->flags & MRB_ARY_SHARED)
#define ARY_SET_SHARED_FLAG(a) ((a)->flags |= MRB_ARY_SHARED)