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diff --git a/packages/vm/src/wasm_backend/engine.rs b/packages/vm/src/wasm_backend/engine.rs
index 7b2f6190a9..a6bdb62e09 100644
--- a/packages/vm/src/wasm_backend/engine.rs
+++ b/packages/vm/src/wasm_backend/engine.rs
@@ -16,14 +16,27 @@ use super::limiting_tunables::LimitingTunables;
 /// https://github.com/WebAssembly/memory64/blob/master/proposals/memory64/Overview.md
 const MAX_WASM_PAGES: u32 = 65536;
 
-fn cost(_operator: &Operator) -> u64 {
+fn cost(operator: &Operator) -> u64 {

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Length prefixes key namespacing, version 2

In https://github.com/CosmWasm/cosmwasm/blob/main/docs/STORAGE_KEYS.md you can see the standard storage key encoding used in CosmWasm from 2020-2023. In the meantime we figured out that using short keys is important for the performance of the underlying database. How much it affects performance, I don't know. But the more I learn about how those databases and their caching works, the more I'm convinced this is the right direction.

CosmWasm developers love performance. It allows them to build things that are hard or impossible to build in other systems. We want to make it easy for our developers to reach peak performance.

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#[test]
fn can_loop_through_coins() -> StdResult<()> {
    let mut coins = Coins::default();
    coins.add(Coin::new(123, "uwasm"))?;
    coins.add(Coin::new(7, "uwasm"))?;
    coins.add(Coin::new(65, "uatom"))?;

    for borrowed_coin in coins.iter() {
        println!("Element: {borrowed_coin}");
    }

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{"public_key": "a1ee12542360bf75742bcade13d6134e7d5283d9eb782887c47d3d9725f05805d37b0106b7f744395bf82c175dd7434a169e998f188a657a030d588892c0cd2c01f996aaf331c4d8bc5b9734bbe261d09e7d2d39ef88b635077f262bd7bbb30f"}

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{
  "amount": -170141183460469231731687303715884105728
}

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diff --git a/packages/std/src/memory.rs b/packages/std/src/memory.rs
index c331a53c..09462d25 100644
--- a/packages/std/src/memory.rs
+++ b/packages/std/src/memory.rs
@@ -15,9 +15,21 @@ pub struct Region {
     pub length: u32,
 }
 
+
+extern "C" {

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diff --git a/examples/compiler_singlepass.rs b/examples/compiler_singlepass.rs
index 01fb181b12..5d6d90152f 100644
--- a/examples/compiler_singlepass.rs
+++ b/examples/compiler_singlepass.rs
@@ -41,6 +41,10 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     // Create an empty import object.
     let import_object = imports! {};
 
+    // Create a new store for this instance
+    let compiler = Singlepass::default();

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This file contains 100 Nois addresses and public keys randomly generated using a CosmJS script. The private key is not persisted.

1. nois1ffy2rz96sjxzm2ezwkmvyeupktp7elt6w3xckt (secp256k1 A13gZDsrmBTAFxcwtTTpBiYR7S0iD2o73r4FGmHnVQ1n)
2. nois1uw8c69maprjq5ure7x80x9nauasrn7why5dfwd (secp256k1 A2SpNQkf6qCAq7/xjm5gGVLrn2VU4Z9VPWiSXdrykmYx)
3. nois1zh77twxfc47eu59q7mc7027jvvcnrpte3sr922 (secp256k1 AxhQFLFRR0Dd7NH2DaEc58FuwNfufsJ3bzK6W2R70kwH)
4. nois1wpy3gwlw4tt3uy0u5jrspfz0w9azztvlr0d04s (secp256k1 A7TAYBnzPnww1W2EbfDsA3Wk5DWhZnIrq6HQztX2Q8RA)
5. nois1rw47dxvhw3ahdlcznvwpcz43cdq8l0832eg6re (secp256k1 As3jzZ22pKFx59VXh7zk9OkQJHgQIugJvPg7wNsGb4qU)
6. nois12a8yv4ndgnkygujj7cmmkfz2j9wjanezldwye0 (secp256k1 A4KD4pHEXEFv6XB+Sbe0+bccx7uGRNwtnuBTC/hC/kil)
7. nois1vupa7ftemarqqmq0c7a60f2je4adt3h6r39hzf (secp256k1 A2nsC3rcN1u7RCUXX8oJMO4ULGepu1Wo99GQKYqMUsXU)

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#!/bin/bash
set -o errexit -o nounset -o pipefail
command -v shellcheck >/dev/null && shellcheck "$0"

# This script lives in a ./devtools sub directory.
# Navigate to the repo root first.
SCRIPT_DIR="$(realpath "$(dirname "$0")")"
cd "${SCRIPT_DIR}/.."

# compile all contracts

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{
  "jsonrpc": "2.0",
  "id": -1,
  "result": {
    "hash": "F64B8C6A320A9C25FD1EA60B00194817B069C9CBEF19B736117D9339F33F2E51",
    "height": "389794",
    "index": 1,
    "tx_result": {
      "code": 0,
      "data": "CiYKJC9jb3Ntd2FzbS53YXNtLnYxLk1zZ0V4ZWN1dGVDb250cmFjdA==",