►
From YouTube: RustFest Zürich 2017 - Rust: an alternative to high-level programming languages? by Élisabeth Henry
Description
Rust is a systems programming language that runs blazingly fast. But what’s its place for writing applications that don’t particularly need to delve into systems programming, and only need to be “not too slow”? Can it be appealing to programmers who would rather not have to deal with memory management and don’t care about the performance cost?
Can Rust’s type safety and the guarantees it brings allow a high-level programmer to be more confident, empowering them to more easily build and maintain complex applications? Or is Rust’s complexity too much of a barrier for that?
About Élisabeth Henry:
I used to work as a programmer, but I eventually gave up because I couldn’t find a job, and ended I trying to make a living selling fantasy novels. Maybe this last fact shows that I’m not a great programmer (though there might be other factors in play). I love Rust because it makes me feel more confident about the code I write, and the strict compiler compensates for my lack of discipline.
A
So,
first
a
bit
of
background
on
myself,
so
I
Lisa
Bev
only
okay,
Lizzy
could
I
get
my
name
because
I
love
the
computer
science
background
and
I
have
a
degree,
but
for
a
few
years
I
haven't
been
actually
working
in
computer
science,
and
currently
I
am
a
semi-professional,
fantasy
writer,
so
I
wet
novels
in
French.
You
might
have
just
for
my
accent
and
I,
try
to
make
some
money
from
them
and
when
I
discovered
rest
I
was
like.
A
This
is
a
really
cool
language.
I
was
quite
excited
by
it,
but
I
did
not
have
any
project
for
like
system
sisters,
programming
and
instead
I
well
I
wanted
to
mix
to
do
something
that
was
useful
for
me
and
in
my
case
it
I
ended
up
quite
through
implementing
the
wheel
once
again
with
yet
another
markdown
to
PDF,
HTML
and
epub
converter
called
Chromebook
and
at
the
time
I
thought
that
it
wasn't
objectively
a
great
idea
to
use
verse
for
this.
A
A
Typically,
that's
not
very
an
issue
because
you
would
use
a
garbage
collection
in
a
level
language.
You
would
typically
use
11
language,
Java,
C,
sharp,
Python,
Ruby
or
whatever
and
security
isn't
really
an
issue
either,
because
most
of
the
time
is
an
application
that
will
be
worse
when
an
user,
a
personal
computer.
So
if
I
can
AG
the
application
to
get
access
to
that
computer,
that's
not
really
a
big
problem.
So
we're
not
talking
about
web
server,
for
example.
A
Well,
security
and
safety
can
be
and
performance
to
a
much
more
of
an
issue,
and
when
you
look
at
the
pitch
from
rest
at
the
presentation,
it
doesn't
quite
fit
the
description,
and
my
first
experience
with
rest
was
something
like
this
and
probably
use
was
a
bit
similar.
I
mean
I,
guess
most
of
people
in
this
room
so
basically
were
at
least
once
so
before.
I
want
to
talk
about
trust.
I
just
wanted
to
talk
a
bit
about
my
experience
with
over
language
and
yep
yeah
because
rest
in
space
well
but
yeah.
A
So
my
experience
with
over
language
and
as
a
disclaimer
I,
don't
pretend
to
be
a
great
programmer.
I
can
be
read
as
a
lazy,
yeah
I'm,
not
a
great
designer
I,
don't
come
with
like
the
cleanest
ideas
at
first
and
I
come
sometimes
pick
chocolate.
You
know,
I
do
something
that
work
at
this
time.
I'd
put
some
commands
like
fix
me.
You
know
and
I'll
never
fix
it
and
yeah
I
have
quite
a
bit
of
Abaddon
projects,
because
I
have
ideas
and
start
while
working
on
them.
A
But
it's
not
very
exciting.
To
rewrite
a
project.
I
mean
Zack
seemed
to
start
a
new
project,
but
to
start
a
new
project
once
you
have
already
written
it
before
it's
a
bit,
not
very
interesting,
so
yeah
I
think
mal
problems
with
many
language
and
many
imperative.
Programming
language
is
I,
thought
that
make
it
very
easy
to
start
coding,
but
that
I
saw
made
very
easy
to
do
things
the
wrong
way
and
yeah.
A
You
can
often
end
up
if
you're,
not
very
structural.
Like
me,
I
mean,
if
you
like
me,
you're,
not
very
structure,
to
be
clear
and
you
can
end
up
with
very
complex
code,
because
you
have
some
variables
that
can
be
modified
like
every
one
new
card
and
it's
very
like
spaghetti
coding,
and
the
thing
is
most
of
tips.
I
read
from
vices
like
avoid
this,
like
good
programmers
should
not
do
that.
A
A
A
It
ended
up
being
far
more
painful
and
far
more
expensive.
But
if
I
had
went
to
dentist
is
a
very
first
place
and
let's
really
make
sure
that
you
brush
your
teeth
properly
and
because
there
are
a
lot
of
I
mean
I
won't
go
into
details
about
olive
oil
filters
inverse
were
a
lot
of
checks
at
compile
time.
A
There's
a
great
time
system
and
more
importantly,
I
think,
is
that
libraries
I
mean
it
can
be
difficult,
sometimes
to
use
a
study
tie
system,
but
libraries
that
can
I
think
most
of
the
work
relies
on
really
notice
of
equator
toss
of
us
because
yeah
it's
a
bit
hard
to
make
a
library
that
is
easy
to
use.
But
for
the
user.
A
So
in
West,
my
very
scientific
data
was
the
stat
was
called
the
same
because
it
was
before
I
coded
I
had
a
cool
idea
and
then,
of
course,
very
super
exciting,
and
it's
not
present
and
it
can
be
difficult
under
yellow
stars
called
hard
curve
at
the
beginning
and
then
finally,
getting
code
to
compile
can
be
a
bit
longer
than
in
an
oval
language.
But
the
good
thing
is
when
it
compiles.
In
my
experience,
we're
really,
if
a
few
bugs
in
worse
than
most
of
our
language
I
was
used
to
so.
A
At
this
point,
visas
are
all
great
I
mean
I
had
a
really
hard
time
getting
to
compile.
But
at
this
point
is
good
and
when
you
want
to
add
a
new
feature,
the
compiler
would
make
sure
that
you
won't
break
everything
in
your
password
and,
of
course,
when
you
project
was
a
bit
I,
it's
not
a
new
project
anymore.
A
It's
matter
present
the
thrill
of
starting
something
new,
but
when
you
want
to
blower
in
my
stance,
we
first
if,
when
I
want
to
go
back
to
a
project
that
I
haven't
touched
in
a
few
months
in
many
languages
could
be
quite
difficult,
because
either
things
make
sense
when
I
would
then.
But
now
it's
like
some
kind
of
mess
and
we
first
I'm
like
okay,
I,
can't
quite
understand
things,
so
it
works
on
I'll.
So
I
found
out
that
personally
that
les
matine's
yeah
design
a
bit
less
confusing.
A
But
the
thing
is:
I
thought
a
bit
about
the
type
system
and
things
like
trade.
There
are
options
which
avoid
null
pointers,
for
example,
but
we're
not
very
specific
to
rest
I
mean
you
could
have
this
in
over.
For
example,
garbage
collected
language
and,
what's
very
specific
to
us
I
think,
is
the
Bravo
checker,
because
it's
I
don't
think
it's
something
you
see
in
a
lot
of
foreign
language.
A
Maybe
I
think
there
are
some
research
language,
but
using
something
similar,
but
it's
not
mainstream
feature
you
see
often,
and
the
board
Chico
is
really
designed
to
make
sure
that
you
don't
have
low
overhead
for
systems
programming.
So
you
don't
have
to
have
a
garbage
collection
because
it
has
a
cost,
but
for
a
level
application
you
would
think
that
you
don't
really
need
these
performances.
So
maybe
you
know
it's.
A
It's
not
value
a
feature,
interesting
feature
and
it's
more
painful,
because
you
have
to
worry
about
the
power
checker
and
when
I
saw
some
discussions
about
using
the
rest
for
level
applications.
Sometimes
I
saw
people
asking
like.
Maybe
we
should
just
put
our
core
F
style
of
T
everywhere,
so
we
don't
have
to
worry
to
worry
about
the
Barrois
checker
and
some
some
people
may
say
yeah,
but
maybe
I
mean
you
can
just
say
that
rest
is
a
I
mean
if,
for
you,
rest
is
just
okay
male
with
a
difference
and
types.
A
Maybe
you
should
just
learn
a
canal
and
I
think
that
actually
it's
a
familiar.
This
question
that
is
raised
like
okay,
is
to
use
for
eye
level
application
because
it
has
a
great
type
system,
and
you
know
you
can
basically
it's
okay,
despite
verbal
checker
or
this
actually
is
it
maybe
because
of
a
bow
chicka,
but
it
I
found
it
actually
more
interesting
and
when
I
first
learn
last,
if
something
like
chia
soda
not
ten
years
ago,
obviously
I
saw
this
conference
by
an
explosion.
A
A
At
the
same
time,
so
you
can
either
have
surveyed
reference
or
mutual
value
friends,
but
not
both
of
at
the
same
time,
and
this
is
what
ensures
memory
safety
and
also
guarantees
some
kind
of
read
safety,
at
least
that
I
eat,
avoid
data
races
like
for
free,
because
it's
basically
the
same
conditions
and
I
wonder.
Maybe
this
like
yeah
I
mean
it's
basically
mixing
virtual,
it's
a
bit
root
of
all
evil.
So
maybe
it's
also
the
root
of
having
some
obscure
card
and
maybe
not
mixing
aliasing
and
mutation.
A
I
saw
max
for
adding
a
more
readable
code
and
code.
That
is
easier
to
reason
about.
So
this
is
an
example,
for
example
in
Python.
Well,
typically,
you
have
a
variable,
a
you
can
display
it.
You
can
display
its
value
and
you
have
some
value,
but
then
you
can
you
call
some
unrelated
function
or
some
method
on
an
unrelated,
valuable,
and
the
way
thing
is
that
the
value
of
a
might
have
been
modified
because
it
could
be
analogous
to
some
global
variable
or
it
could
be
an
address
to
some
other
object.
A
But
you
don't
realize
you
were
actually
modifying
it,
so
it
can
make
things
quite
a
prison
and
you
basically
have
to
know
the
details,
the
details
about
every
function
or
method,
you're
calling
and
in
the
rest,
if
you
have
the
same
code,
you
can
be
pretty
sure
that
the
variable
hasn't
been
modified,
because
if
you
really
want
to
modify
it,
you
have
to
make
things
a
bit
more
explicit
like
if
ever
having
to
pass
and
pass
on
Newt
parameter.
So
it
makes
quite
clear
vacuum.
A
Modifying
it
or
even
addressing
you
have
to
Roberto.
Checker
will
make
sure
that
you
can't
have
in
this
case
you
have
this
brackets
curly
brackets,
because
it
has
to
go
out
of
scope
because
you
can
go
back
to
using
a
again.
So
you
can't
have
something
like
or
I
did
not
rely,
20
lines
up
or
in
my
code,
I
got
some
laid
by
equals,
ampersand
Newt
a
because
it
wouldn't
have
compiled,
and
you
can
also
have
things
like,
for
example,
cell
with
cell
or
mutexes.
But
again
it
is
quite
explicit
when
you
use
them.
A
A
And
then
I
experience
bullet
checking
is
quite
a
big
thing
in
rest,
but
when
you
write
a
little
application,
the
good
thing
is
most
of
the
time
were
ever
us
are
pretty
easy
to
fix
very
bit
annoying,
but
a
lot
of
them
hopefully
going
to
go
away.
Question
I
mean,
for
example,
this
vague
path
of
Bagdad
line.
This
is
annoying,
but
it
doesn't
compile.
A
But
I
took
this
example:
phone
from
the
error
free
to
actually
fix
the
problem,
and
so
hopefully
soon
Ashley
it
will
compile
and
what
you
won't
have
this
problem
anymore
and
when
you
actually
have
real
problem
with
a
biological
and
when
you
have
to
redesign
your
code
to
refactor
local,
it
can
be
painful.
But
in
my
experience
again
is
writing
application.
A
Maybe
in
libraries
it
can
be
a
bit
different,
but
most
of
the
time
it's
a
sign
that
there
was
something
wrong
actually
with
my
design
and
if
I
hadn't
fixed
this
at
this
point
under
taken
the
time
to
think
about
it
a
bit
more
yet
to
step
away
from
the
project
and
think
about
it,
and
things
would
have
been
much
more
difficult
to
fill
in.
In
some
later
time,
because
when
you
have
to
find
wherever
bugs
come
from
and
things
like
that
and
worry,
it
is
possible
to
go
around
the
board
checker.
A
But
the
good
thing
is
that
when
you
use
some
types,
you
know
that
you
probably
should
know
what
you're
doing
at
this
point,
which
is
great
for
me,
because
it
means
that
so
that
most
of
the
time
I
don't
really
have
to
know
what
I'm
doing
and
the
compiler
will
at
my
bike
and
make
sure
I'm
not
making
things
explode
or
whatever
so
yeah.
An
attractive
from
to
this
I
think
is
a
functional
programming,
of
course,
and
I.
Think
it's
great.
A
It
solve
the
problem
of
aliasing
a
mutation
in
a
different
way,
because
there
is
like
no
magician
at
all
and
I.
Think
it's
a
great
idea.
It
can
be
great
for
a
level
application.
My
only
problem
with
functional
programming
is
I
found
it
quite
hard
to
wrap.
My
mind
around
it
mainly
because
I'm
used
to
imperative
programming
so
yeah,
it
wasn't
very
I,
don't
know
if
I,
quite
as
I
I
feel
like
I
really
should
be
enlightened
and
understand
better,
but
yeah
I
mean
it
can
be
quite
difficult.
Sometimes.
A
This
is
a
picture
I
took
from
the
person.
I
was
actually
trained
to
such
Monday,
the
example
and
they
ended
up
rivet,
so
yeah
I
think
West
has
a
very
interesting
position
in
the
landscape
of
programming
language
because
there
is
like
imperative,
programming
and
white
side,
and
it's
like
open
bar
of
mutation
and
erasing
and
the
garbage
collection.
A
It's
all
interesting
because
you
can't
have
garbage
collection
which
mitigates
some
problems.
So
it's
like
yeah.
If
you
don't
want
I
mean
we're.
Two
natives
can
be
very
difficult,
but
yeah
rest
can
be
really
interesting
as
well
for
non
systems.
Programming
I
live
an
application
because
it
yeah
it's
an
alternative
to
yeah
I,
don't
know
if
it's
a
new
paradigm
or
something
it's
like
you
are
very
I,
don't
know.
A
Well,
it's
not
to
say
that,
but
whatever
and
the
problem
with
rest
is
it's
like
a
short
term
versus
long
term
compromise,
it's
harder
to
learn
that
short
term
I.
Think
they're
great
benefits
at
long
term,
but
sometimes
the
problem
is
when
you,
but
when
the
compiler
fits
is
a
bug.
You
take
a
few
minutes
to
fix
it.
A
You
don't
realize
that
maybe
you
could
have
spent
a
few
days
or
a
few
weeks,
maybe
fighting
the
bugs
in
other
programs,
programming,
language
and
I
guess
you
have
to
maybe
either
standard
on
this
first
in
other
language
to
really
see
the
benefits
when
you
use
rest
and
yeah
I.
Think
that
it's
quite
because
the
compiler
is
grumpy
for
you,
so
you
don't
have
to
be,
and
it's
pretty
cool
too
I
mean
you've
the
compilers
you
back
it.
A
You
don't
have
to
worry
about
things
too
much
so
to
conclude:
I,
don't
I
think
that
rest
is
naturally,
probably
not
the
best
I
get
for
total
beginners,
because
we're
a
lot
of
complex.
That
can
be
hard
to
understand
and
I.
Think
if
I
was
teaching
programming
to
somebody
completely
new
to
programming,
I
would
probably
go
for
Python,
for
example,
but
I
quite
album
wrong
and
that
people
return
me
up.
A
They
had
great
experiences,
learning
West
as
a
at
a
first
language,
but
I,
don't
know
it
seems
quite
complicated
still
and
I
think
that
for
great
programmers
last
isn't
really
needed
because
great
programmers
they
don't
use
after
free.
If
I
don't
make
these
levels
there,
you
have
a
great
design.
So
obviously
that's
right,
but
for
like
me,
motors
I,
think
yeah
grass
can
be
a
very
interesting
to
make
things
easier
in
the
long
run
and
to
have,
if
a
long
term
and
to
have
the
compiler
of
your
back
and
yeah
the
fix
your
errors.
A
A
Tests
for
writing
application.
I
guess
ecosystem
is
quite
important,
because
if
there
is
a
library,
it's
very
easier,
if
there
isn't,
it
can
be
more
complicated,
it
really
depends
on
which
application
you're
trying
to
write
so
but
in
general.
Obviously
rest
is
a
younger
language
than
Java
Python,
C,
sharp
or
you
would
be
or
whatever.
So
there
are
less
libraries
and
you
sometimes
have
to
write
library.
A
Personally,
that's
my
personal
list.
Iphone
I
would
love
some
more
internationalization,
like
writes
on
libraries.
I,
had
to
write
some
kind
of
Ikea
right
to
get
my
program
to
be
able
to
be
translated
at
runtime
between,
for
example,
French
and
English.
I.
Think
that
creates
the
quest
at
Iowa.
Co
system
is
more
focused
on
great
obviously,
and
there
are
some
guidelines
on
auto
write,
great
grades
and
great
libraries,
I
think
very
less
for
the
right
application
interest,
and
sometimes
I
was
like
I,
don't
know
if
it's
a
good
idea.
A
I
still
do
it
and
some
people,
like
none
of
it
season,
I
mean,
should
you,
for
example,
use
goggle
install
to
install?
Should
you
tell
people
to
use
consult
with
salut
application?
There
was
some
debate
debate
on
this
and
I
think
I'll
use
some
more
clear.
Guidelines
on
for
application
will
be
nice
and
yeah.
A
My
personal
that
Christmas
wish
list
will
be
having
some
things
where
you
can
just
push
the
code
on
some
like
quite
sutaio
and
publish
your
apps
and
you
don't
have
to
worry
about
cross,
compiling
packaging
or
anything
which
would
be
great
but
and
yeah.
I
also
want
to
say,
I
feel
a
bit
awkward
in
this,
because
everybody
is
like
saying
that
saying
that
various
community
is
great
but
I
mean
it's
quite
true,
so
I
will
say
it
again.
A
I
feel
very
honored
to
be
able
to
speak
in
front
of
you
today
because,
as
I
said
I'm,
not
a
professional
programmer.
So
it's
a
quite
yeah.
Thank
you
for
being
there.
Thank
you,
West
face
for
Adam
Miller
for
the
West
community
yeah.
This
is
an
emotional
part
and
I
think
there
are
great
things
also
to
increase
Wall
Street,
to
make
our
West
more
accessible
to
people
who
are
not
professional
programmers
who
are
not
alight
programmers
but
might
be
a
bit
newer
programming
or
might
be
new
at
systems.
A
Programming
and
that
film
is
really
great
people
who
might
be
part
of
my
marginalized
groups
of
learned
programming
later
in
life,
for
example,
so
I
think
that's
very
cool
and
yeah.
So
thank
you
and
yeah.
Thank
you
for
listening.
This
is
my
cut
to
reward
you
for
listening
to
me.
So
thank
you
very
much.
I,
don't
know
if
there
is
time
for
question.
A
Long
did
it
take
for
you
to
wrap
around
your
head
around
borrowed
shaker
what
I
had
learned
three
before
so
it
wasn't
but
odd.
Most
of
the
time
I
knew
things
about.
Memory
was
supposed
to
work
so
understood
in
understanding.
The
principle
was
relatively
easy,
but
when
it's
more
like
it's
one
thing
to
understand
the
principle,
it's
another
to
realize
that
what
you
think
is
right
might
actually
be
wrong,
or
things
like
that.
So.