diff --git a/packages/contracts/contracts/test-helpers/CrossDomainSimpleStorage.sol b/packages/contracts/contracts/test-helpers/CrossDomainSimpleStorage.sol
index 5cb60e2c7da46..76b20389fbc3e 100644
--- a/packages/contracts/contracts/test-helpers/CrossDomainSimpleStorage.sol
+++ b/packages/contracts/contracts/test-helpers/CrossDomainSimpleStorage.sol
@@ -1,9 +1,9 @@
 pragma solidity ^0.5.0;
 
 import { ICrossDomainMessenger} from "../optimistic-ethereum/bridge/CrossDomainMessenger.interface.sol";
-import { SimpleStorage } from "./SimpleStorage.sol";
+import { SimpleStorageEVM } from "./SimpleStorageEVM.sol";
 
-contract CrossDomainSimpleStorage is SimpleStorage {
+contract CrossDomainSimpleStorage is SimpleStorageEVM {
     ICrossDomainMessenger crossDomainMessenger;
     address public crossDomainMsgSender;
 
diff --git a/packages/contracts/contracts/test-helpers/SimpleStorage.sol b/packages/contracts/contracts/test-helpers/SimpleStorage.sol
index 18fa3a139e780..2ef112873896b 100644
--- a/packages/contracts/contracts/test-helpers/SimpleStorage.sol
+++ b/packages/contracts/contracts/test-helpers/SimpleStorage.sol
@@ -4,10 +4,44 @@ contract SimpleStorage {
     mapping(bytes32 => bytes32) public builtInStorage;
 
     function setStorage(bytes32 key, bytes32 value) public {
-        builtInStorage[key] = value;
+        bytes memory EMcalldata = abi.encodeWithSelector(bytes4(keccak256(bytes("ovmSSTORE()"))), key, value);
+
+        (bool success,) = msg.sender.call(EMcalldata);
+
+    }
+
+    function getStorage(bytes32 key) public returns (bytes32) {
+        bytes memory EMcalldata = abi.encodeWithSelector(bytes4(keccak256(bytes("ovmSLOAD()"))), key);
+
+        (bool success, bytes memory response) = msg.sender.call(EMcalldata);
+
+        return bytesToBytes32(response);
+    }
+
+    function setSequentialSlots(uint startKey, bytes32 value, uint numIterations) public {
+        for (uint i = 0; i < numIterations; i++) {
+            setStorage(bytes32(startKey + i), value);
+        }
+    }
+
+    function setSameSlotRepeated(bytes32 key, bytes32 value, uint numIterations) public {
+        for (uint i = 0; i < numIterations; i++) {
+            setStorage(key, value);
+        }
+    }
+
+    function getStorages(bytes32 key, uint numIterations) public {
+        for (uint i = 0; i < numIterations; i++) {
+            getStorage(key);
+        }
     }
 
-    function getStorage(bytes32 key) public view returns (bytes32) {
-        return builtInStorage[key];
+    function bytesToBytes32(bytes memory source) private pure returns (bytes32 result) {
+        if (source.length == 0) {
+            return 0x0;
+        }
+        assembly {
+            result := mload(add(source, 32))
+        }
     }
 }
diff --git a/packages/contracts/contracts/test-helpers/SimpleStorageEVM.sol b/packages/contracts/contracts/test-helpers/SimpleStorageEVM.sol
new file mode 100644
index 0000000000000..9ddd5f97d75c4
--- /dev/null
+++ b/packages/contracts/contracts/test-helpers/SimpleStorageEVM.sol
@@ -0,0 +1,13 @@
+pragma solidity ^0.5.0;
+
+contract SimpleStorageEVM {
+    mapping(bytes32 => bytes32) public builtInStorage;
+
+    function setStorage(bytes32 key, bytes32 value) public {
+        builtInStorage[key] = value;
+    }
+
+    function getStorage(bytes32 key) public view returns (bytes32) {
+        return builtInStorage[key];
+    }
+}
\ No newline at end of file
diff --git a/packages/contracts/test/contracts/ovm/PartialStateManager.gas-metering-script.spec.ts b/packages/contracts/test/contracts/ovm/PartialStateManager.gas-metering-script.spec.ts
new file mode 100644
index 0000000000000..c1212fac468fb
--- /dev/null
+++ b/packages/contracts/test/contracts/ovm/PartialStateManager.gas-metering-script.spec.ts
@@ -0,0 +1,250 @@
+import '../../setup'
+
+/* External Imports */
+import { ethers } from '@nomiclabs/buidler'
+import {
+  getLogger,
+  ZERO_ADDRESS,
+  NULL_ADDRESS,
+  hexStrToNumber,
+  numberToHexString,
+} from '@eth-optimism/core-utils'
+import { Contract, ContractFactory, Signer } from 'ethers'
+import { fromPairs } from 'lodash'
+
+/* Internal Imports */
+import {
+  GAS_LIMIT,
+  Address,
+  makeAddressResolver,
+  deployAndRegister,
+  AddressResolverMapping,
+} from '../../test-helpers'
+
+/* Logging */
+const log = getLogger('partial-state-manager-gas-metering', true)
+
+/* Testing Constants */
+
+const OVM_TX_BASE_GAS_FEE = 30_000
+const OVM_TX_MAX_GAS = 100_000_000
+const GAS_RATE_LIMIT_EPOCH_IN_SECONDS = 60_000
+const MAX_GAS_PER_EPOCH = 2_000_000_000
+
+const key = '0x' + '12'.repeat(32)
+const numIterationsToDo = 30
+const startIndexForMultipleKeys = 1
+const multipleSequentialKeys = new Array<string>(numIterationsToDo)
+  .fill('lol')
+  .map((v, i) => {
+    return numberToHexString(startIndexForMultipleKeys + i, 32)
+  })
+const val = '0x' + '23'.repeat(32)
+
+/*********
+ * TESTS *
+ *********/
+
+describe.skip('Partial State Manager -- Storage Performance Testing Script', () => {
+  let wallet: Signer
+  let walletAddress: string
+  let resolver: AddressResolverMapping
+  let ExecutionManager: ContractFactory
+  let PartialStateManager: ContractFactory
+
+  let executionManager: Contract
+  let stateManager: Contract
+
+  let SimpleStorage: ContractFactory
+  let simpleStorageNative: Contract
+  const simpleStorageOVMAddress: Address = '0x' + '45'.repeat(20)
+
+  const getSimpleStorageCallCallback = (methodName: string, params: any[]) => {
+    const internalCallBytes = SimpleStorage.interface.encodeFunctionData(
+      methodName,
+      params
+    )
+
+    const EMCallBytes = ExecutionManager.interface.encodeFunctionData(
+      'executeTransaction',
+      [
+        1_000_000,
+        0,
+        simpleStorageOVMAddress,
+        internalCallBytes,
+        walletAddress,
+        ZERO_ADDRESS,
+        OVM_TX_MAX_GAS,
+        false,
+      ]
+    )
+
+    return async () => {
+      return wallet.sendTransaction({
+        to: executionManager.address,
+        data: EMCallBytes,
+        gasLimit: GAS_LIMIT,
+      })
+    }
+  }
+
+  const getCumulativeSequencedGas = async (): Promise<number> => {
+    return hexStrToNumber(
+      (await executionManager.getCumulativeSequencedGas())._hex
+    )
+  }
+
+  const getChangeInCumulativeGas = async (
+    callbackConsumingGas: () => Promise<any>
+  ): Promise<{
+    internalToOVM: number
+    additionalExecuteTransactionOverhead: number
+  }> => {
+    const before: number = await getCumulativeSequencedGas()
+    const tx = await callbackConsumingGas()
+    const after: number = await getCumulativeSequencedGas()
+
+    const receipt = await executionManager.provider.getTransactionReceipt(
+      tx.hash
+    )
+
+    const change = after - before
+
+    return {
+      internalToOVM: change,
+      additionalExecuteTransactionOverhead:
+        hexStrToNumber(receipt.gasUsed._hex) - change,
+    }
+  }
+
+  before(async () => {
+    ;[wallet] = await ethers.getSigners()
+    walletAddress = await wallet.getAddress()
+    resolver = await makeAddressResolver(wallet)
+    ExecutionManager = await ethers.getContractFactory('ExecutionManager')
+    PartialStateManager = await ethers.getContractFactory('PartialStateManager')
+    SimpleStorage = await ethers.getContractFactory('SimpleStorage')
+
+    executionManager = await deployAndRegister(
+      resolver.addressResolver,
+      wallet,
+      'ExecutionManager',
+      {
+        factory: ExecutionManager,
+        params: [
+          resolver.addressResolver.address,
+          NULL_ADDRESS,
+          [
+            OVM_TX_BASE_GAS_FEE,
+            OVM_TX_MAX_GAS,
+            GAS_RATE_LIMIT_EPOCH_IN_SECONDS,
+            MAX_GAS_PER_EPOCH,
+            MAX_GAS_PER_EPOCH,
+          ],
+        ],
+      }
+    )
+
+    stateManager = (
+      await deployAndRegister(
+        resolver.addressResolver,
+        wallet,
+        'StateManager',
+        {
+          factory: PartialStateManager,
+          params: [resolver.addressResolver.address, walletAddress],
+        }
+      )
+    ).connect(wallet)
+
+    simpleStorageNative = await SimpleStorage.deploy()
+
+    await stateManager.insertVerifiedContract(walletAddress, walletAddress, 0)
+
+    await stateManager.insertVerifiedContract(
+      simpleStorageOVMAddress,
+      simpleStorageNative.address,
+      0
+    )
+  })
+
+  beforeEach(async () => {
+    // reset the single key value so that sstore costs are the same between tests
+    await stateManager.insertVerifiedStorage(
+      simpleStorageOVMAddress,
+      key,
+      '0x' + '00'.repeat(32)
+    )
+    // reset the sequential keys we set so sstore costs are the same between tests (new set vs update)
+    for (const aKey of multipleSequentialKeys) {
+      await stateManager.insertVerifiedStorage(
+        simpleStorageOVMAddress,
+        aKey,
+        '0x' + '00'.repeat(32)
+      )
+    }
+  })
+
+  it('setStorage', async () => {
+    const doCall = getSimpleStorageCallCallback('setStorage', [key, val])
+    const change = await getChangeInCumulativeGas(doCall)
+    log.debug(
+      `OVM gas cost of a single setStorage is ${change.internalToOVM}, with + ${change.additionalExecuteTransactionOverhead} EVM overhead from executeTransaction().`
+    )
+  })
+
+  it('getstorage', async () => {
+    const doCall = getSimpleStorageCallCallback('getStorage', [key])
+    const change = await getChangeInCumulativeGas(doCall)
+    log.debug(
+      `OVM gas cost of a single getStorage is ${change.internalToOVM}, with + ${change.additionalExecuteTransactionOverhead} EVM overhead from executeTransaction().`
+    )
+  })
+
+  it(`getstorages (${numIterationsToDo}x)`, async () => {
+    const doCall = getSimpleStorageCallCallback('getStorages', [
+      key,
+      numIterationsToDo,
+    ])
+    const change = await getChangeInCumulativeGas(doCall)
+    log.debug(
+      `OVM gas cost of ${numIterationsToDo} getStorages is ${change.internalToOVM}, with + ${change.additionalExecuteTransactionOverhead} EVM overhead from executeTransaction().`
+    )
+    log.debug(
+      `This corresponds to an OVM cost of ${change.internalToOVM /
+        numIterationsToDo} per iteration.`
+    )
+  })
+
+  it(`setSameSlotRepeated (${numIterationsToDo}x set storage, same key)`, async () => {
+    const doCall = getSimpleStorageCallCallback('setSameSlotRepeated', [
+      key,
+      val,
+      numIterationsToDo,
+    ])
+    const change = await getChangeInCumulativeGas(doCall)
+    log.debug(
+      `OVM gas cost of ${numIterationsToDo} setStorages (repeated) is ${change.internalToOVM}, with + ${change.additionalExecuteTransactionOverhead} EVM overhead from executeTransaction().`
+    )
+    log.debug(
+      `This corresponds to an OVM cost of ${change.internalToOVM /
+        numIterationsToDo} per iteration.`
+    )
+  })
+
+  it(`setStorages (${numIterationsToDo}x, sequential unset keys)`, async () => {
+    const doCall = getSimpleStorageCallCallback('setSequentialSlots', [
+      startIndexForMultipleKeys,
+      val,
+      numIterationsToDo,
+    ])
+    const change = await getChangeInCumulativeGas(doCall)
+    log.debug(
+      `OVM gas cost of ${numIterationsToDo} setStorages (unique) is ${change.internalToOVM}, with + ${change.additionalExecuteTransactionOverhead} EVM overhead from executeTransaction().`
+    )
+    log.debug(
+      `This corresponds to an OVM cost of ${change.internalToOVM /
+        numIterationsToDo} per iteration.`
+    )
+  })
+})