vue3-core/packages/compiler-sfc/src/cache.ts

import { LRUCache } from 'lru-cache'

export function createCache<T extends {}>(
  max = 500,
): Map<string, T> | LRUCache<string, T> {
  /* v8 ignore next 3 */
  if (__GLOBAL__ || __ESM_BROWSER__) {
    return new Map<string, T>()
  }
  return new LRUCache({ max })
}