<s>
In	O
computer	O
software	O
development	O
,	O
genetic	B-Algorithm
Improvement	I-Algorithm
is	O
the	O
use	O
of	O
optimisation	O
and	O
machine	O
learning	O
techniques	O
,	O
particularly	O
search-based	B-Algorithm
software	I-Algorithm
engineering	I-Algorithm
techniques	O
such	O
as	O
genetic	B-Algorithm
programming	I-Algorithm
to	O
improve	O
existing	O
software	O
.	O
</s>
<s>
The	O
improved	O
program	B-Application
need	O
not	O
behave	O
identically	O
to	O
the	O
original	O
.	O
</s>
<s>
For	O
example	O
,	O
automatic	O
bug	B-Error_Name
fixing	O
improves	O
program	B-Language
code	I-Language
by	O
reducing	O
or	O
eliminating	O
buggy	B-Error_Name
behaviour	O
.	O
</s>
<s>
it	O
uses	O
less	O
memory	B-General_Concept
,	O
</s>
<s>
GI	O
differs	O
from	O
,	O
for	O
example	O
,	O
formal	B-Architecture
program	I-Architecture
translation	I-Architecture
,	O
in	O
that	O
it	O
primarily	O
verifies	O
the	O
behaviour	O
of	O
the	O
new	O
mutant	O
version	O
by	O
running	O
both	O
the	O
new	O
and	O
the	O
old	O
software	O
on	O
test	O
inputs	O
and	O
comparing	O
their	O
output	O
and	O
performance	O
in	O
order	O
to	O
see	O
if	O
the	O
new	O
software	O
can	O
still	O
do	O
what	O
is	O
wanted	O
of	O
the	O
original	O
program	B-Application
and	O
is	O
now	O
better	O
.	O
</s>
<s>
Genetic	B-Algorithm
improvement	I-Algorithm
can	O
be	O
used	O
to	O
create	O
multiple	B-General_Concept
versions	I-General_Concept
of	O
programs	O
,	O
each	O
tailored	B-Application
to	O
be	O
better	O
for	O
a	O
particular	O
use	O
or	O
for	O
a	O
particular	O
computer	O
.	O
</s>
<s>
Genetic	B-Algorithm
improvement	I-Algorithm
can	O
be	O
used	O
with	O
multi-objective	O
optimization	O
to	O
consider	O
improving	O
software	O
along	O
multiple	O
dimensions	O
or	O
to	O
consider	O
trade-offs	O
between	O
several	O
objectives	O
,	O
such	O
as	O
asking	O
GI	O
to	O
evolve	O
programs	O
which	O
trade	O
speed	O
against	O
the	O
quality	O
of	O
answers	O
they	O
give	O
.	O
</s>
<s>
or	O
binary	O
machine	B-Language
code	I-Language
.	O
</s>
