add git.iim.gay/grufwub/go-store for storage backend, replacing blob.Storage

Signed-off-by: kim (grufwub) <grufwub@gmail.com>

vendor/git.iim.gay/grufwub/fastpath/pool.go

@@ -0,0 +1,32 @@
+package fastpath
+
+import "sync"
+
+// 1/8 max unix path length
+const defaultBufSize = 512
+
+var (
+	builderPool sync.Pool
+	once        = sync.Once{}
+)
+
+func pool() *sync.Pool {
+	once.Do(func() {
+		builderPool = sync.Pool{
+			New: func() interface{} {
+				builder := NewBuilder(make([]byte, defaultBufSize))
+				return &builder
+			},
+		}
+	})
+	return &builderPool
+}
+
+func AcquireBuilder() *Builder {
+	return pool().Get().(*Builder)
+}
+
+func ReleaseBuilder(b *Builder) {
+	b.Reset()
+	pool().Put(b)
+}