<s>
A	O
trace	B-Application
tree	I-Application
is	O
a	O
data	B-General_Concept
structure	I-General_Concept
that	O
is	O
used	O
in	O
the	O
runtime	O
compilation	O
of	O
programming	B-Language
code	I-Language
.	O
</s>
<s>
Trace	B-Application
trees	I-Application
are	O
used	O
in	O
tracing	B-Application
just-in-time	I-Application
compilation	I-Application
where	O
tracing	O
is	O
used	O
during	O
code	O
execution	O
to	O
look	O
for	O
hot	O
spots	O
before	O
compilation	O
.	O
</s>
<s>
More	O
information	O
can	O
be	O
gained	O
allowing	O
better	O
compiler	B-Application
optimizations	I-Application
,	O
including	O
the	O
removal	O
of	O
some	O
function	O
call	O
overhead	O
.	O
</s>
