2020-04-10 01:11:40 -04:00
|
|
|
#ifndef RUBY_TOPLEVEL_VARIABLE_H /*-*-C-*-vi:se ft=c:*/
|
|
|
|
|
#define RUBY_TOPLEVEL_VARIABLE_H
|
|
|
|
|
/**
|
|
|
|
|
* @file
|
|
|
|
|
* @author Ruby developers <ruby-core@ruby-lang.org>
|
|
|
|
|
* @copyright This file is a part of the programming language Ruby.
|
|
|
|
|
* Permission is hereby granted, to either redistribute and/or
|
|
|
|
|
* modify this file, provided that the conditions mentioned in the
|
|
|
|
|
* file COPYING are met. Consult the file for details.
|
|
|
|
|
*/
|
fastpath for ivar read of FL_EXIVAR objects.
vm_getivar() provides fastpath for T_OBJECT by caching an index
of ivar. This patch also provides fastpath for FL_EXIVAR objects.
FL_EXIVAR objects have an each ivar array and index can be cached
as T_OBJECT. To access this ivar array, generic_iv_tbl is exposed
by rb_ivar_generic_ivtbl() (declared in variable.h which is newly
introduced).
Benchmark script:
Benchmark.driver(repeat_count: 3){|x|
x.executable name: 'clean', command: %w'../clean/miniruby'
x.executable name: 'trunk', command: %w'./miniruby'
objs = [Object.new, 'str', {a: 1, b: 2}, [1, 2]]
objs.each.with_index{|obj, i|
rep = obj.inspect
rep = 'Object.new' if /\#/ =~ rep
x.prelude str = %Q{
v#{i} = #{rep}
def v#{i}.foo
@iv # ivar access method (attr_reader)
end
v#{i}.instance_variable_set(:@iv, :iv)
}
puts str
x.report %Q{
v#{i}.foo
}
}
}
Result:
v0.foo # T_OBJECT
clean: 85387141.8 i/s
trunk: 85249373.6 i/s - 1.00x slower
v1.foo # T_STRING
trunk: 57894407.5 i/s
clean: 39957178.6 i/s - 1.45x slower
v2.foo # T_HASH
trunk: 56629413.2 i/s
clean: 39227088.9 i/s - 1.44x slower
v3.foo # T_ARRAY
trunk: 55797530.2 i/s
clean: 38263572.9 i/s - 1.46x slower
2019-11-28 13:02:44 -05:00
|
|
|
|
|
|
|
|
/* per-object */
|
|
|
|
|
|
|
|
|
|
struct gen_ivtbl {
|
|
|
|
|
uint32_t numiv;
|
|
|
|
|
VALUE ivptr[FLEX_ARY_LEN];
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
struct st_table *rb_ivar_generic_ivtbl(void);
|
2020-04-10 01:11:40 -04:00
|
|
|
|
|
|
|
|
#endif /* RUBY_TOPLEVEL_VARIABLE_H */
|