Function createFastMemoizeCache

packages/utils/defaultTimezone.ts:5–20

(
  store: Record<string, V | undefined>
)

const cache: Record<string, Intl.DateTimeFormat> = {}

function createFastMemoizeCache<V>(
  store: Record<string, V | undefined>
): Cache<string, V> {
  return {
    create() {
      return {
        get(key) {
          return store[key]
        },
        set(key, value) {
          store[key] = value
        },
      }
    },
  }
}

type DTFParameters = ConstructorParameters<typeof Intl.DateTimeFormat>