Run results for: Move To First 2

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36

Browser: Chrome 126

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Old Code	282889.2 Ops/sec
New Code	278726.6 Ops/sec

Script Preparation code:

var wallets = [
  {
    currency: {
      id: "USD"
    }
  },
  {
    currency: {
      id: "IDR"
    }
  },
  {
    currency: {
      id: "SGD"
    }
  },
]

Tests:

Old Code
const moveCurrencyToFirst = (wallets, currencyId) => { const currencyIdx = wallets.findIndex( (wallet) => wallet.currency.id === currencyId ); const tempWallets = [...wallets]; if (currencyIdx !== -1) { const currWallet = wallets[currencyIdx]; tempWallets.splice(currencyIdx); tempWallets.unshift(currWallet); } return tempWallets; }; console.log(moveCurrencyToFirst(wallets, "SGD"))
New Code
const moveCurrencyToFirst = (wallets, currencyId) => { if(!wallets.length) return []; return wallets.reduce((result, wallet) => { if(wallet.currency.id === currencyId) { return [wallet, ...result] } return [...result, wallet] }, []) }; console.log(moveCurrencyToFirst(wallets, "SGD"))

Run results for: Move To First 2

Old Code

New Code