Cost model parameters

The cost model for Plutus Core scripts has a number of parameters. These are listed and briefly described below. All of these parameters are listed in the Cardano protocol parameters and can be individually adjusted.

For more details on the meaning of the parameters, consult IOHK [2].

Machine parameters

Operation	Parameter name	Note
apply	cekApplyCost-exBudgetCPU	Constant CPU cost
apply	cekApplyCost-exBudgetMemory	Constant memory cost
builtin	cekBuiltinCost-exBudgetCPU	Constant CPU cost
builtin	cekBuiltinCost-exBudgetMemory	Constant memory cost
con	cekConstCost-exBudgetCPU	Constant CPU cost
con	cekConstCost-exBudgetMemory	Constant memory cost
delay	cekDelayCost-exBudgetCPU	Constant CPU cost
delay	cekDelayCost-exBudgetMemory	Constant memory cost
force	cekForceCost-exBudgetCPU	Constant CPU cost
force	cekForceCost-exBudgetMemory	Constant memory cost
lam	cekLamCost-exBudgetCPU	Constant CPU cost
lam	cekLamCost-exBudgetMemory	Constant memory cost
startup	cekStartupCost-exBudgetCPU	Constant CPU cost
startup	cekStartupCost-exBudgetMemory	Constant memory cost
var	cekVarCost-exBudgetCPU	Constant CPU cost
var	cekVarCost-exBudgetMemory	Constant memory cost

Builtin parameters

Builtin function	Parameter name	Note
addInteger	addInteger-cpu-arguments-intercept	Linear model intercept for the CPU calculation
addInteger	addInteger-cpu-arguments-slope	Linear model coefficient for the CPU calculation
addInteger	addInteger-memory-arguments-intercept	Linear model intercept for the memory calculation
addInteger	addInteger-memory-arguments-slope	Linear model coefficient for the memory calculation
appendByteString	appendByteString-cpu-arguments-intercept	Linear model intercept for the CPU calculation
appendByteString	appendByteString-cpu-arguments-slope	Linear model coefficient for the CPU calculation
appendByteString	appendByteString-memory-arguments-intercept	Linear model intercept for the memory calculation
appendByteString	appendByteString-memory-arguments-slope	Linear model coefficient for the memory calculation
appendString	appendString-cpu-arguments-intercept	Linear model intercept for the CPU calculation
appendString	appendString-cpu-arguments-slope	Linear model coefficient for the CPU calculation
appendString	appendString-memory-arguments-intercept	Linear model intercept for the memory calculation
appendString	appendString-memory-arguments-slope	Linear model coefficient for the memory calculation
bData	bData-cpu-arguments	Constant CPU cost
bData	bData-memory-arguments	Constant CPU cost
blake2b_256	blake2b-cpu-arguments-intercept	Linear model intercept for the CPU calculation
blake2b_256	blake2b-cpu-arguments-slope	Linear model coefficient for the CPU calculation
blake2b_256	blake2b-memory-arguments	Constant memory cost
chooseData	chooseData-cpu-arguments	Constant CPU cost
chooseData	chooseData-memory-arguments	Constant memory cost
chooseList	chooseList-cpu-arguments	Constant CPU cost
chooseList	chooseList-memory-arguments	Constant memory cost
chooseUnit	chooseUnit-cpu-arguments	Constant CPU cost
chooseUnit	chooseUnit-memory-arguments	Constant memory cost
consByteString	consByteString-cpu-arguments-intercept	Linear model intercept for the CPU calculation
consByteString	consByteString-cpu-arguments-slope	Linear model coefficient for the CPU calculation
consByteString	consByteString-memory-arguments-intercept	Linear model intercept for the memory calculation
consByteString	consByteString-memory-arguments-slope	Linear model coefficient for the memory calculation
constrData	constrData-cpu-arguments	Constant CPU cost
constrData	constrData-memory-arguments	Constant memory cost
decodeUtf8	decodeUtf8-cpu-arguments-intercept	Linear model intercept for the CPU calculation
decodeUtf8	decodeUtf8-cpu-arguments-slope	Linear model coefficient for the CPU calculation
decodeUtf8	decodeUtf8-memory-arguments-intercept	Linear model intercept for the memory calculation
decodeUtf8	decodeUtf8-memory-arguments-slope	Linear model coefficient for the memory calculation
divideInteger	divideInteger-cpu-arguments-constant	Constant CPU cost (argument sizes above diagonal)
divideInteger	divideInteger-cpu-arguments-model-arguments-intercept	Linear model intercept for the CPU calculation (argument sizes on or below diagonal)
divideInteger	divideInteger-cpu-arguments-model-arguments-slope	Linear model coefficient for the CPU calculation (argument sizes on or below diagonal)
divideInteger	divideInteger-memory-arguments-intercept	Linear model intercept for the memory calculation (argument sizes on or below diagonal)
divideInteger	divideInteger-memory-arguments-minimum	Constant memory cost (argument sizes above diagonal)
divideInteger	divideInteger-memory-arguments-slope	Linear model coefficient for the memory calculation (argument sizes on or below diagonal)
encodeUtf8	encodeUtf8-cpu-arguments-intercept	Linear model intercept for the CPU calculation below diagonal
encodeUtf8	encodeUtf8-cpu-arguments-slope	Linear model coefficient for the CPU calculation
encodeUtf8	encodeUtf8-memory-arguments-intercept	Linear model intercept for the memory calculation
encodeUtf8	encodeUtf8-memory-arguments-slope	Linear model coefficient for the memory calculation
equalsByteString	equalsByteString-cpu-arguments-constant	Constant CPU cost (arguments different sizes)
equalsByteString	equalsByteString-cpu-arguments-intercept	Linear model intercept for the CPU calculation (arguments same size)
equalsByteString	equalsByteString-cpu-arguments-slope	Linear model coefficient for the CPU calculation (arguments same size)
equalsByteString	equalsByteString-memory-arguments	Constant memory
equalsData	equalsData-cpu-arguments-intercept	Linear model intercept for the CPU calculation
equalsData	equalsData-cpu-arguments-slope	Linear model coefficient for the CPU calculation
equalsData	equalsData-memory-arguments	Constant memory cost
equalsInteger	equalsInteger-cpu-arguments-intercept	Linear model intercept for the CPU calculation
equalsInteger	equalsInteger-cpu-arguments-slope	Linear model coefficient for the memory calculation
equalsInteger	equalsInteger-memory-arguments	Constant memory cost
equalsString	equalsString-cpu-arguments-constant	Constant CPU cost (arguments different sizes)
equalsString	equalsString-cpu-arguments-intercept	Linear model intercept for the CPU calculation (arguments same size)
equalsString	equalsString-cpu-arguments-slope	Linear model coefficient for the CPU calculation (arguments same size)
equalsString	equalsString-memory-arguments	Constant memory cost
fstPair	fstPair-cpu-arguments	Constant CPU cost
fstPair	fstPair-memory-arguments	Constant memory cost
headList	headList-cpu-arguments	Constant CPU cost
headList	headList-memory-arguments	Constant memory cost
iData	iData-cpu-arguments	Constant CPU cost
iData	iData-memory-arguments	Constant memory cost
ifThenElse	ifThenElse-cpu-arguments	Constant CPU cost
ifThenElse	ifThenElse-memory-arguments	Constant memory cost
indexByteString	indexByteString-cpu-arguments	Constant CPU cost
indexByteString	indexByteString-memory-arguments	Constant memory cost
lengthOfByteString	lengthOfByteString-cpu-arguments	Constant CPU cost
lengthOfByteString	lengthOfByteString-memory-arguments	Constant memory cost
lessThanByteString	lessThanByteString-cpu-arguments-intercept	Linear model intercept for the CPU calculation
lessThanByteString	lessThanByteString-cpu-arguments-slope	Linear model coefficient for the CPU calculation
lessThanByteString	lessThanByteString-memory-arguments	Constant memory cost
lessThanEqualsByteString	lessThanEqualsByteString-cpu-arguments-intercept	Linear model intercept for the CPU calculation
lessThanEqualsByteString	lessThanEqualsByteString-cpu-arguments-slope	Linear model coefficient for the CPU calculation
lessThanEqualsByteString	lessThanEqualsByteString-memory-arguments	Constant memory cost
lessThanEqualsInteger	lessThanEqualsInteger-cpu-arguments-intercept	Linear model intercept for the CPU calculation
lessThanEqualsInteger	lessThanEqualsInteger-cpu-arguments-slope	Linear model coefficient for the CPU calculation
lessThanEqualsInteger	lessThanEqualsInteger-memory-arguments	Constant memory cost
lessThanInteger	lessThanInteger-cpu-arguments-intercept	Linear model intercept for the CPU calculation
lessThanInteger	lessThanInteger-cpu-arguments-slope	Linear model coefficient for the CPU calculation
lessThanInteger	lessThanInteger-memory-arguments	Constant memory cost
listData	listData-cpu-arguments	Constant CPU cost
listData	listData-memory-arguments	Constant memory cost
mapData	mapData-cpu-arguments	Constant CPU cost
mapData	mapData-memory-arguments	Constant memory cost
mkCons	mkCons-cpu-arguments	Constant CPU cost
mkCons	mkCons-memory-arguments	Constant memory cost
mkNilData	mkNilData-cpu-arguments	Constant CPU cost
mkNilData	mkNilData-memory-arguments	Constant memory cost
mkNilPairData	mkNilPairData-cpu-arguments	Constant CPU cost
mkNilPairData	mkNilPairData-memory-arguments	Constant memory cost
mkPairData	mkPairData-cpu-arguments	Constant CPU cost
mkPairData	mkPairData-memory-arguments	Constant memory cost
modInteger	modInteger-cpu-arguments-constant	Constant CPU cost (argument sizes above diagonal)
modInteger	modInteger-cpu-arguments-model-arguments-intercept	Linear model intercept for the CPU calculation (argument sizes on or below diagonal)
modInteger	modInteger-cpu-arguments-model-arguments-slope	Linear model coefficient for the CPU calculation (argument sizes above diagonal)
modInteger	modInteger-memory-arguments-intercept	Linear model intercept for the memory calculation
modInteger	modInteger-memory-arguments-minimum	Constant memory cost (argument sizes above diagonal)
modInteger	modInteger-memory-arguments-slope	Linear model coefficient for the memory calculation (argument sizes on or below diagonal)
multiplyInteger	multiplyInteger-cpu-arguments-intercept	Linear model intercept for the CPU calculation
multiplyInteger	multiplyInteger-cpu-arguments-slope	Linear model coefficient for the CPU calculation
multiplyInteger	multiplyInteger-memory-arguments-intercept	Linear model intercept for the memory calculation
multiplyInteger	multiplyInteger-memory-arguments-slope	Linear model coefficient for the memory calculation
nullList	nullList-cpu-arguments	Constant CPU cost
nullList	nullList-memory-arguments	Constant memory cost
quotientInteger	quotientInteger-cpu-arguments-constant	Constant CPU cost (argument sizes above diagonal)
quotientInteger	quotientInteger-cpu-arguments-model-arguments-intercept	Linear model intercept for the CPU calculation (argument sizes on or below diagonal)
quotientInteger	quotientInteger-cpu-arguments-model-arguments-slope	Linear model coefficient for the CPU calculation (argument sizes on or below diagonal)
quotientInteger	quotientInteger-memory-arguments-intercept	Linear model intercept for the CPU calculation (argument sizes on or below diagonal)
quotientInteger	quotientInteger-memory-arguments-minimum	Constant memory cost (argument sizes above diagonal)
quotientInteger	quotientInteger-memory-arguments-slope	Linear model coefficient for the memory calculation (argument sizes on or below diagonal)
remainderInteger	remainderInteger-cpu-arguments-constant	Constant CPU cost (argument sizes above diagonal)
remainderInteger	remainderInteger-cpu-arguments-model-arguments-intercept	Linear model intercept for the CPU calculation (argument sizes on or below diagonal)
remainderInteger	remainderInteger-cpu-arguments-model-arguments-slope	Linear model coefficient for the CPU calculation (argument sizes on or below diagonal)
remainderInteger	remainderInteger-memory-arguments-intercept	Linear model intercept for the memory calculation (argument sizes on or below diagonal)
remainderInteger	remainderInteger-memory-arguments-minimum	Constant memory cost (argument sizes above diagonal)
remainderInteger	remainderInteger-memory-arguments-slope	Linear model coefficient for the memory calculation (argument sizes on or below diagonal)
sha2_256	sha2_256-cpu-arguments-intercept	Linear model intercept for the CPU calculation
sha2_256	sha2_256-cpu-arguments-slope	Linear model coefficient for the CPU calculation
sha2_256	sha2_256-memory-arguments	Constant memory cost
sha3_256	sha3_256-cpu-arguments-intercept	Linear model intercept for the CPU calculation
sha3_256	sha3_256-cpu-arguments-slope	Linear model coefficient for the CPU calculation
sha3_256	sha3_256-memory-arguments	Constant memory cost
sliceByteString	sliceByteString-cpu-arguments-intercept	Linear model intercept for the CPU calculation
sliceByteString	sliceByteString-cpu-arguments-slope	Linear model coefficient for the CPU calculation
sliceByteString	sliceByteString-memory-arguments-intercept	Linear model intercept for the memory calculation
sliceByteString	sliceByteString-memory-arguments-slope	Linear model coefficient for the memory calculation
sndPair	sndPair-cpu-arguments	Constant CPU cost
sndPair	sndPair-memory-arguments	Constant memory cost
subtractInteger	subtractInteger-cpu-arguments-intercept	Linear model intercept for the CPU calculation
subtractInteger	subtractInteger-cpu-arguments-slope	Linear model coefficient for the CPU calculation
subtractInteger	subtractInteger-memory-arguments-intercept	Linear model intercept for the memory calculation
subtractInteger	subtractInteger-memory-arguments-slope	Linear model coefficient for the memory calculation
tailList	tailList-cpu-arguments	Constant CPU cost
tailList	tailList-memory-arguments	Constant memory cost
trace	trace-cpu-arguments	Constant CPU cost
trace	trace-memory-arguments	Constant memory cost
unBData	unBData-cpu-arguments	Constant CPU cost
unBData	unBData-memory-arguments	Constant memory cost
unConstrData	unConstrData-cpu-arguments	Constant CPU cost
unConstrData	unConstrData-memory-arguments	Constant memory cost
unIData	unIData-cpu-arguments	Constant CPU cost
unIData	unIData-memory-arguments	Constant memory cost
unListData	unListData-cpu-arguments	Constant CPU cost
unListData	unListData-memory-arguments	Constant memory cost
unMapData	unMapData-cpu-arguments	Constant CPU cost
unMapData	unMapData-memory-arguments	Constant memory cost
verifySignature	verifySignature-cpu-arguments-intercept	Linear model intercept for the CPU calculation
verifySignature	verifySignature-cpu-arguments-slope	Linear model coefficient for the CPU calculation
verifySignature	verifySignature-memory-arguments	Constant memory cost