<s>
The	O
Hoard	B-General_Concept
memory	I-General_Concept
allocator	I-General_Concept
,	O
or	O
Hoard	O
,	O
is	O
a	O
memory	B-General_Concept
allocator	I-General_Concept
for	O
Linux	B-Application
,	O
OS	B-Operating_System
X	I-Operating_System
,	O
and	O
Microsoft	B-Application
Windows	I-Application
.	O
</s>
<s>
Hoard	O
is	O
designed	O
to	O
be	O
efficient	O
when	O
used	O
by	O
multithreaded	B-General_Concept
applications	O
on	O
multiprocessor	B-Operating_System
computers	O
.	O
</s>
<s>
Hoard	O
is	O
distributed	O
under	O
the	O
Apache	B-Application
License	I-Application
,	I-Application
version	I-Application
2.0	I-Application
.	O
</s>
<s>
In	O
2000	O
,	O
its	O
author	O
Emery	O
Berger	O
benchmarked	O
some	O
famous	O
memory	B-General_Concept
allocators	I-General_Concept
and	O
stated	O
Hoard	O
improves	O
the	O
performance	O
of	O
multithreaded	B-General_Concept
applications	O
by	O
providing	O
fast	O
,	O
scalable	B-Architecture
memory	B-General_Concept
management	I-General_Concept
functions	O
(	O
malloc	B-Language
and	O
free	B-Language
)	O
.	O
</s>
<s>
In	O
particular	O
,	O
it	O
reduces	O
contention	O
for	O
the	O
heap	O
(	O
the	O
central	O
data	O
structure	O
used	O
in	O
dynamic	B-General_Concept
memory	I-General_Concept
allocation	I-General_Concept
)	O
caused	O
when	O
multiple	O
threads	O
allocate	O
or	O
free	B-Language
memory	O
,	O
and	O
avoids	O
the	O
false	B-General_Concept
sharing	I-General_Concept
that	O
can	O
be	O
introduced	O
by	O
memory	B-General_Concept
allocators	I-General_Concept
.	O
</s>
<s>
At	O
the	O
same	O
time	O
,	O
Hoard	O
has	O
strict	O
bounds	O
on	O
fragmentation	B-Architecture
.	O
</s>
<s>
It	O
has	O
also	O
inspired	O
changes	O
to	O
other	O
memory	B-General_Concept
allocators	I-General_Concept
such	O
as	O
the	O
one	O
in	O
OS	B-Operating_System
X	I-Operating_System
since	O
February	O
2008	O
(	O
first	O
released	O
in	O
Mac	B-Device
OS	I-Device
X	I-Device
Snow	I-Device
Leopard	I-Device
)	O
.	O
</s>
