Go ristretto缓存

package pkg

import (
   "github.com/dgraph-io/ristretto"
   "log"
   "sync"
   "time"
)

var onceCache sync.Once

var Cache *ristretto.Cache

func init() {
   onceCache.Do(func() {
      Cache = Caches()
   })
}

func Caches() *ristretto.Cache {
   cache, err := ristretto.NewCache(&ristretto.Config{
      NumCounters:        1e7,     // Num keys to track frequency of (10M).
      MaxCost:            1 << 30, // Maximum cost of cache (1GB).
      BufferItems:        64,      // Number of keys per Get buffer.
      IgnoreInternalCost :true,
   })
   if err != nil {
      panic(any(err))

   }
   return cache
}

func txst()  {
    kv :="值"
   Cache.SetWithTTL("k", kv, 1, time.Second*1800)
   Cache.Wait()
   v, ok := Cache.Get("k")
   if !ok {
      return
   }else {
      log.Println(v)
   }

}