优化缓存相关代码

internal/caches/list_file.go

@@ -72,15 +72,15 @@ func (this *FileList) Init() error {
 			defer wg.Done()
 
 			var db = NewFileListDB()
-			err = db.Open(dir + "/db-" + types.String(i) + ".db")
-			if err != nil {
-				lastErr = err
+			dbErr := db.Open(dir + "/db-" + types.String(i) + ".db")
+			if dbErr != nil {
+				lastErr = dbErr
 				return
 			}
 
-			err = db.Init()
-			if err != nil {
-				lastErr = err
+			dbErr = db.Init()
+			if dbErr != nil {
+				lastErr = dbErr
 				return
 			}
 
@@ -120,8 +120,6 @@ func (this *FileList) Add(hash string, item *Item) error {
 		return err
 	}
 
-	// 这里不增加点击量，以减少对数据库的操作次数
-
 	this.memoryCache.Write(hash, 1, this.maxExpiresAtForMemoryCache(item.ExpiredAt))
 
 	if this.onAdd != nil {

internal/caches/storage_file.go

@@ -560,7 +560,9 @@ func (this *FileStorage) openWriter(key string, expiredAt int64, status int, hea
 	if isNewCreated && existsFile {
 		flags |= os.O_TRUNC
 	}
+	fsutils.WriteBegin()
 	writer, err := os.OpenFile(tmpPath, flags, 0666)
+	fsutils.WriteEnd()
 	if err != nil {
 		// TODO 检查在各个系统中的稳定性
 		if os.IsNotExist(err) {

internal/ttlcache/cache_test.go

@@ -40,10 +40,14 @@ func TestNewCache(t *testing.T) {
 }
 
 func TestCache_Memory(t *testing.T) {
+	if !testutils.IsSingleTesting() {
+		return
+	}
+
 	testutils.StartMemoryStats(t)
 
 	var cache = NewCache()
-	var count = 2_000_000
+	var count = 20_000_000
 	for i := 0; i < count; i++ {
 		cache.Write("a"+strconv.Itoa(i), 1, time.Now().Unix()+3600)
 	}