<s>
Alacritty	B-Application
is	O
a	O
free	B-License
and	I-License
open-source	I-License
GPU-accelerated	O
terminal	B-Application
emulator	I-Application
focused	O
on	O
performance	O
and	O
simplicity	O
.	O
</s>
<s>
It	O
is	O
written	O
in	O
Rust	B-Application
and	O
uses	O
OpenGL	B-Application
(	O
for	O
performance	O
)	O
.	O
</s>
<s>
A	O
similar	O
terminal	B-Application
emulator	I-Application
that	O
uses	O
OpenGL	B-Application
is	O
kitty	B-Language
.	O
</s>
<s>
Joe	O
Wilm	O
announced	O
Alacritty	B-Application
in	O
his	O
blog	O
on	O
6	O
January	O
2017	O
.	O
</s>
<s>
He	O
describes	O
it	O
as	O
"	O
the	O
result	O
of	O
frustration	O
with	O
existing	O
terminal	B-Application
emulators	I-Application
.	O
</s>
<s>
Using	O
vim	B-Application
inside	O
tmux	B-Language
in	O
many	O
terminals	O
was	O
a	O
particularly	O
bad	O
experience	O
.	O
</s>
<s>
He	O
found	O
urxvt	O
and	O
st	O
difficult	O
to	O
configure	O
and	O
criticized	O
their	O
"	O
inability	O
to	O
run	O
on	O
non-X11	O
platforms	O
"	O
.	O
</s>
<s>
With	O
the	O
release	O
of	O
version	O
0.2.0	O
in	O
September	O
2018	O
Alacritty	B-Application
gained	O
support	O
for	O
scrollback	O
.	O
</s>
<s>
In	O
version	O
0.3.0	O
,	O
released	O
in	O
April	O
2019	O
,	O
Alacritty	B-Application
entered	O
beta	O
stage	O
and	O
support	O
for	O
Windows	O
,	O
text	O
reflow	O
,	O
and	O
clicking	O
on	O
URLs	O
was	O
added	O
.	O
</s>
<s>
In	O
version	O
0.5.0	O
,	O
released	O
in	O
July	O
2020	O
,	O
a	O
mode	O
with	O
vi	B-Application
keybindings	O
for	O
searching	O
and	O
copying	O
text	O
was	O
added	O
.	O
</s>
<s>
In	O
version	O
0.6.0	O
,	O
released	O
in	O
November	O
2020	O
,	O
a	O
new	O
binding	O
to	O
cancel	O
search	O
and	O
leave	O
vi	B-Application
mode	O
was	O
added	O
.	O
</s>
<s>
Alacritty	B-Application
supports	O
true	O
color	O
in	O
addition	O
to	O
the	O
standard	O
16	O
ANSI	O
colors	O
.	O
</s>
<s>
Alacritty	B-Application
explicitly	O
does	O
not	O
support	O
tabs	O
or	O
splits	O
because	O
similar	O
functionality	O
can	O
be	O
achieved	O
with	O
a	O
terminal	O
multiplexer	O
or	O
window	B-Application
manager	I-Application
.	O
</s>
<s>
Alacritty	B-Application
is	O
configured	O
by	O
editing	O
a	O
template	O
file	O
in	O
YAML	B-Protocol
format	O
,	O
for	O
example	O
:	O
</s>
