<s>
Loop	B-General_Concept
perforation	I-General_Concept
is	O
an	O
approximate	O
computing	O
technique	O
that	O
allows	O
to	O
regularly	O
skip	O
some	O
iterations	O
of	O
a	O
loop	O
.	O
</s>
<s>
Variants	O
of	O
loop	B-General_Concept
perforation	I-General_Concept
include	O
those	O
that	O
skip	O
iterations	O
deterministically	O
at	O
regular	O
intervals	O
,	O
those	O
that	O
skip	O
iterations	O
at	O
the	O
beginning	O
or	O
the	O
end	O
of	O
the	O
loop	O
,	O
and	O
those	O
that	O
skip	O
a	O
random	O
sample	O
of	O
iterations	O
.	O
</s>
<s>
Loop	B-General_Concept
perforation	I-General_Concept
techniques	O
were	O
first	O
developed	O
by	O
MIT	O
senior	O
researchers	O
Martin	O
C	B-Language
.	O
Rinard	O
and	O
Stelios	O
Sidiroglou	O
.	O
</s>
