<s>
In	O
data	B-General_Concept
compression	I-General_Concept
,	O
BCJ	B-Algorithm
,	O
short	O
for	O
Branch/Call/Jump	O
,	O
refers	O
to	O
a	O
technique	O
that	O
improves	O
the	O
compression	O
of	O
machine	B-Language
code	I-Language
by	O
replacing	O
relative	O
branch	B-General_Concept
addresses	I-General_Concept
with	O
absolute	O
ones	O
.	O
</s>
<s>
This	O
allows	O
a	O
Lempel	B-Algorithm
–	I-Algorithm
Ziv	I-Algorithm
compressor	O
to	O
identify	O
duplicate	O
targets	O
and	O
more	O
efficiently	O
encode	O
them	O
.	O
</s>
<s>
Different	O
BCJ	B-Algorithm
filters	O
are	O
used	O
for	O
different	O
instruction	B-General_Concept
sets	I-General_Concept
,	O
as	O
each	O
use	O
different	O
opcodes	O
for	O
branching	O
.	O
</s>
<s>
A	O
form	O
of	O
BCJ	B-Algorithm
is	O
seen	O
in	O
Microsoft	O
's	O
cabinet	O
file	O
format	O
from	O
1996	O
,	O
which	O
filters	O
x86	O
CALL	O
instructions	O
for	O
the	O
LZX	B-Device
compressor	O
.	O
</s>
<s>
The	O
7z	O
and	O
xz	B-Language
file	O
formats	O
implement	O
BCJ	B-Algorithm
for	O
multiple	O
architectures	O
.	O
</s>
<s>
ZPAQ	B-Application
calls	O
its	O
x86	O
BCJ	B-Algorithm
as	O
"	O
E8E9	O
"	O
,	O
after	O
the	O
opcode	O
values	O
.	O
</s>
<s>
bsdiff	O
,	O
a	O
tool	O
for	O
delta	B-Application
updates	I-Application
,	O
circumvents	O
the	O
need	O
of	O
writing	O
architecture-specific	O
BCJ	B-Algorithm
tools	O
by	O
encoding	O
bytewise	O
differences	O
.	O
</s>
<s>
For	O
a	O
squashfs	B-Application
image	O
of	O
a	O
Fedora	O
Linux	O
31	O
live	O
image	O
,	O
using	O
x86	O
BCJ	B-Algorithm
saves	O
an	O
extra	O
30	O
MB	O
out	O
of	O
the	O
~	O
1.7	O
GB	O
compressed	O
size	O
,	O
but	O
doubles	O
the	O
installation	O
time	O
.	O
</s>
