<s>
YARV	B-Language
(	O
Yet	O
another	O
Ruby	B-Language
VM	O
)	O
is	O
a	O
bytecode	O
interpreter	B-Application
that	O
was	O
developed	O
for	O
the	O
Ruby	B-Language
programming	I-Language
language	I-Language
by	O
Koichi	O
Sasada	O
.	O
</s>
<s>
The	O
goal	O
of	O
the	O
project	O
was	O
to	O
greatly	O
reduce	O
the	O
execution	O
time	O
of	O
Ruby	B-Language
programs	O
.	O
</s>
<s>
Since	O
YARV	B-Language
has	O
become	O
the	O
official	O
Ruby	B-Language
interpreter	B-Application
for	O
Ruby	B-Language
1.9	O
,	O
it	O
is	O
also	O
named	O
KRI	O
(	O
Koichi	B-Language
's	I-Language
Ruby	I-Language
Interpreter	I-Language
)	O
,	O
in	O
the	O
same	O
vein	O
as	O
the	O
original	O
Ruby	B-Language
MRI	I-Language
,	O
named	O
in	O
honor	O
of	O
Ruby	B-Language
's	O
creator	O
Yukihiro	O
Matsumoto	O
.	O
</s>
<s>
Benchmarks	O
by	O
Antonio	O
Cangiano	O
showed	O
speed	O
improvements	O
over	O
other	O
Ruby	B-Language
VMs	O
,	O
with	O
1.9	O
on	O
average	O
four	O
times	O
faster	O
than	O
the	O
original	O
interpreter	B-Application
.	O
</s>
<s>
YARV	B-Language
was	O
merged	O
into	O
the	O
Ruby	B-Language
Subversion	B-Application
repository	O
on	O
January	O
1	O
,	O
2007	O
.	O
</s>
<s>
It	O
was	O
released	O
as	O
part	O
of	O
Ruby	B-Language
1.9.0	O
on	O
December	O
26	O
,	O
2007	O
,	O
replacing	O
Ruby	B-Language
MRI	I-Language
.	O
</s>
