10 Advanced Solidity Gas Optimization Techniques

The
rapid
advancements
in
the

blockchain
and

Ethereum
domain
is
undoubtedly
a
good
news
in
the
technology-driven
era.
However
it
is
important
to
keep
in
mind
that
the
high
gas
fees
is
a
pressing
issue
that
one
cannot
ignore.
In
fact
the
substantial
gas
fees
is
a
major
source
of
concern
that
can
diminish
the
attractiveness
of
Ethereum.
But
the
problem
can
be
smartly
tackled
by
adopting
advanced

Solidity
gas
optimization
techniques.
Let
us
learn
about
some
of
the
top
solidity
gas
optimization
techniques.

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your
identity
as
a
certified
blockchain
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An
Insight
into
Gas
Optimization
is
Solidity

Solidity
is
the
programming
language
that
has
been
designed
for
developing

smart
contracts.
While
using
Solidity,
one
has
to
be
familiar
with
the
concept
of
gas
as
well
as
gas
optimization.
Gas
is
basically
the
measurement
unit
of
the
volume
of
computational
effort
that
is
needed
for
performing
certain
operations
on
Ethereum. 

Solidity
gas
optimization
involves
the
processes
and
practices
to
minimize
the
cost
of
Solidity
smart
codes
while
executing
them.
It
is
essential
to
prioritize
gas
optimization
solidity
to
keep
a
tab
on
the
cost
aspect
and
support
sustainability.

Are
you
aspiring
to
learn
the
fundamentals
of
the
Ethereum
Virtual
Machine
and
smart
contracts’
upgradability?
Enroll
now
in
the Advanced
Solidity
Development
Course.

Top
Solidity
Gas
Optimization
Techniques 

Now
that
you
know
the
importance
of
gas
optimization
in
solidity,
it
is
time
to
focus
on
some
key
techniques.
The
main
question
that
may
be
bothering
you
is
–
How
to
optimize
gas
in
Solidity?
Below
are
some
of
the
top
solidity
gas
optimization
techniques
that
can
help
answer
the
question.

• 
  Substituting
  Arrays
  with
  Mappings

Arrays
and
maps
are
the
two
data
types
that
can
help
describe
the
data
lists
in
Solidity.
It
is
quite
common
to
use
the
array
data
structure
while
using
Solidity.
However,
did
you
know
that
it
increases
the
level
of
gas
substantially.
The
issue
can
be
minimized
by
using
maps
in
the
place
of
arrays.
By
doing
so
you
will
be
able
to
save
more
than
2000
gas
on
every
reading.
This
feature
of
mapping
makes
it
a
much
affordable
option
in
comparison
to
arrays.
It
is
among
the
most
popular
solidity
gas
optimization
techniques
that
you
can
use.

• 
  Reducing
  on-chain
  data

By
reducing
the
data
that
has
been
recorded
on
a
chain
you
can
minimize
the
consumption
of
gas.
When
the
volume
of
data
is
less,
there
is
the
need
for
less
storage
for
storing
variables.
As
a
result,
there
is
an
opportunity
to
minimize
the
gas
that
is
required
for
your
smart
contract.
A
simple
trick
that
you
can
follow
involves
making
use
of
events
for
storing
off-chain
data
instead
of
using
the
on-chain
data
storing
option.
It
is
certainly
one
of
the
best
techniques
to
optimize
solidity
gas.

• 
  Utilization
  of
  constants
  as
  well
  as
  immutable
  variables 

A
smart
way
of
gas
optimization
in
Solidity
involves
making
use
of
constants
and
immutable
variables.
This
step
can
obviously
help
you
reduce
gas
costs
to
a
considerable
degree.
These
variables
are
ideal
choices
since
they
do
not
consume
a
lot
of
storage
space
within

Ethereum
Virtual
Machine. 

When
constants
and
immutable
variables
are
used,
the
allocation
of
values
takes
place
solely
during
the
creation
of
smart
contracts.
Furthermore,
they
subsequently
become
read-only.
Hence
these
variables
have
high
cost-effectiveness
when
compared
with
regular
variables. 

Familiarize
yourself
with
the
complete
Ethereum
smart
contract
development
lifecycle
and
gain
fluency
in
the
best
practices
for
smart
contract
coding,
testing,
and
deployment
with Smart
Contracts
Development
Course.

• 
  Use
  of
  Solidity
  Compiler
  Optimizer

One
of
the
top
solidity
gas
optimization
techniques
involves
enabling
or
using

Solidity
Compiler
Optimizer.
Its
role
is
vital
since
it
helps
to
transform
complex
expressions
into
their
simpler
versions.
Hence
it
leads
to
the
reduction
in
the
size
of
the
codes.
That’s
not
all!
The
execution
cost,
deployment
costs
as
well
as
costs
relating
to
function
calls
gets
lower.
It
is
a
useful
strategy
that
can
facilitate
gas
optimization
solidity.

• 
  Optimization
  of
  Unused
  variables 

One
of
the
most
popular
solidity
gas
optimization
techniques
is
optimizing
unused
variables.
There
are
many
times
when
irrelevant
or
unnecessary
variables
are
kept
while
executing
smart
contracts.
This
is
a
poor
practice
which
ends
up
increasing
the
overall
gas
costs.
By
removing
the
unused
variables,
smart
contracts
can
get
optimized,
thereby
reducing
gas
costs.
This
technique
is
crucial
since
it
can
help
you
free
up
the
space
that
remains
unused.

• 
  Utilizing
  Indexed
  Events 

Events
are
an
important
part
of
blockchain.
The
role
of
events
is
essential
since
they
allow
users
to
know
when
something
takes
place
within
the

blockchain
network.
In
solidity,
events
serve
as
the
ultimate
shortcuts
that
increase
the
speed
of
smart
contracts
as
well
as
working
of
external
systems.
By
having
indexed
events
in
place
there
is
an
opportunity
to
keep
track
of
all
activities
relating
to
a
smart
contract
in
an
efficient
manner.
By
using
indexed
events,
it
is
possible
to
reduce
the
overall
gas
that
is
consumed. 

• 
  Replacing
  dynamic
  sized
  arrays
  with
  fixed
  size
  arrays

One
of
the
best
techniques
to
optimize
solidity
gas
is
to
use
fixed
size
arrays
instead
of
dynamic
size
arrays.
In
case
it
is
a
must
for
you
to
use
arrays
in
your
Smart
contract,
you
can
opt
for
the
fixed
size
versions.
One
of
the
main
limitations
of
dynamic
size
arrays
is
that
they
may
expand
indefinitely.
Because
of
this
the
gas
cost
may
substantially
increase.
However
this
problem
does
not
arise
when
it
comes
to
fixed
size
arrays.
Due
to
the
fixed
nature
there
is
no
risk
relating
to
the
indefinite
expansion
of
array
and
gas
costs.

• 
  Avoid
  the
  use
  of
  lower
  than
  256
  bit
  variables

The
variables
that
you
use
in
Solidity
can
have
a
direct
impact
on
the
gas
that
is
consumed.
You
must
avoid
using
variables
that
are
lower
than
256
bit.
In
case
you
use
uint8
you
need
to
know
that
it
is
a
highly
inefficient
option.
Instead
you
should
opt
for
uint256
in
Solidity.
It
is
a
much
more
efficient
approach
that
will
help
you
minimize
gas
costs
by
ensuring
gas
optimization.

• 
  Utilizing
  External
  Visibility
  Modifier

When
it
comes
to
Solidity,
it
is
instrumental
to
use
the
most
suitable
visibility
for
diverse
functions.
It
can
certainly
serve
as
an
effective
measure
that
can
help
in
the
optimization
of
gas
that
you
need
while
creating
smart
contracts.
You
must
keep
in
mind
that
choosing
an
external
visibility
modifier
is
one
of
the
best
options
that
you
can
consider.
It
is
highly
gas
efficient
in
comparison
to
the
public
option. 

Gas
optimization
is
low
in
the
case
of
public
functions.
This
is
because
in
the
case
of
public
functions,
it
has
to
support
external
as
well
as
internal
calls.
However
in
the
case
of
external
functions,
it
can
read
only
from
calldata
and
hence
there
is
no
need
for
copying
data
to
memory.
This
feature
makes
it
a
useful
gas
optimization
technique. 

• 
  Using
  storage
  pointers
  instead
  of
  memory 

Wherever
applicable,
you
must
use
storage
pointers
instead
of
memory.
Storage
pointers,
in
Solidity,
are
the
variables
that
reference
a
specific
location
in
storage
of
a
smart
contract.
You
need
to
know
how
to
make
the
efficient
use
of
storage
pointers
so
that
you
can
avoid
irrelevant
storage
reads.
It
is
surely
a
gas
efficient
approach
that
can
help
you
minimize
gas
costs
in
solidity. 

The
higher
the
memory,
the
greater
will
be
your
gas
costs
in
Solidity.
You
should
try
to
reduce
the
overall
usage
of
the
memory
while
developing
smart
contracts
in
the
Ethereum
blockchain
network.
By
capitalizing
on
storage
pointers
you
may
not
only
save
memory
but
also
optimize
gas
in
Solidity. 

The
identification
of
the
different
Solidity
gas
optimization
techniques
can
certainly
help
you
address
the
question
–
How
to
optimize
gas
in
Solidity?
As
the
rising
gas
costs
can
be
really
burdensome
you
must
consider
the
given
techniques
to
optimize
gas
use
and
reduce
gas
costs.
The
simple
techniques
can
enhance
your
ability
to
leverage
Solidity
while
developing
robust
smart
contracts.

Master
the
art
of
Smart
Contract
development
with
Solidity
to
create
innovative
web3
applications
for
diverse
use
cases
as
a
Solidity
expert
with Solidity
Skill
Path.

Importance
of
gas
optimization
is
Solidity 

Gas
optimization
is
of
paramount
importance
in
Solidity.
It
is
crucial
not
only
for

blockchain
developers
but
for
users,
and
the
overall
environment.
Gas
optimization
solidity
can
ensure
a
project
attains
success
in
the
long
term.
It
can
facilitate
gas
optimization
for
your
smart
contracts.
That’s
not
all!

With
the
top
solidity
gas
optimization
techniques,
the
cost-efficiency,
usability
as
well
as
efficiency
of
Solidity
can
improve.
While
using
the
Solidity
programming
language
for
developing
smart
contracts
you
need
to
focus
on
gas
optimization
so
that
you
can
gain
a
competitive
advantage.

Final
Thoughts 

There
are
a
diverse
range
of
gas
optimization
techniques
that
you
can
use
while
developing
smart
contracts
using
Solidity.
These
techniques
can
help
you
increase
the
efficiency
of
the

smart
contract
development
process
and
other
protocols
and
procedures
that
exist
within
Solidity.
With
the
help
of
the
measures
as
well
as
techniques
that
have
been
identified,
you
can
curb
the
cost
that
is
incurred
due
to
the
use
of
gas.
By
keeping
a
tab
on
the
costs
that
arise
in
relation
to
gas
consumption,
you
can
boost
the
overall
efficiency
of

solidity
as
a
programming
language.
Explore
to
learn
more
about
various
techniques
for
solidity
gas
optimization.