From a8011e21b9365aa23e5beb2184cd4f5659869bcd Mon Sep 17 00:00:00 2001
From: hero0926 <esistkalt@naver.com>
Date: Wed, 15 Nov 2017 14:16:56 +0900
Subject: [PATCH] Add method GetCacheBytes(c *cache) int

---
 cache.go | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/cache.go b/cache.go
index db88d2f..dfa49ca 100644
--- a/cache.go
+++ b/cache.go
@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"io"
 	"os"
+	"reflect"
 	"runtime"
 	"sync"
 	"time"
@@ -1159,3 +1160,14 @@ func New(defaultExpiration, cleanupInterval time.Duration) *Cache {
 func NewFrom(defaultExpiration, cleanupInterval time.Duration, items map[string]Item) *Cache {
 	return newCacheWithJanitor(defaultExpiration, cleanupInterval, items)
 }
+
+// Return a Bytes cache has as int.
+// To Evaluate memory and cache usage.
+func GetCacheBytes(c *cache) int {
+
+	cacheitems := c.Items()
+	ptrcachebyte := uintptr(len(cacheitems)) * reflect.TypeOf(cacheitems).Elem().Size()
+	cachebyte := int(ptrcachebyte)
+
+	return cachebyte
+}