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/go-store/util/pools.go

@@ -0,0 +1,44 @@
+package util
+
+import (
+	"sync"
+
+	"git.iim.gay/grufwub/fastpath"
+	"git.iim.gay/grufwub/go-bufpool"
+	"git.iim.gay/grufwub/go-bytes"
+)
+
+// pathBuilderPool is the global fastpath.Builder pool, we implement
+// our own here instead of using fastpath's default one because we
+// don't want to deal with fastpath's sync.Once locks on every Acquire/Release
+var pathBuilderPool = sync.Pool{
+	New: func() interface{} {
+		pb := fastpath.NewBuilder(make([]byte, 0, 512))
+		return &pb
+	},
+}
+
+// AcquirePathBuilder returns a reset fastpath.Builder instance
+func AcquirePathBuilder() *fastpath.Builder {
+	return pathBuilderPool.Get().(*fastpath.Builder)
+}
+
+// ReleasePathBuilder resets and releases provided fastpath.Builder instance to global pool
+func ReleasePathBuilder(pb *fastpath.Builder) {
+	pb.Reset()
+	pathBuilderPool.Put(pb)
+}
+
+// bufferPool is the global BufferPool, we implement this here
+// so we can share allocations across whatever libaries need them.
+var bufferPool = bufpool.BufferPool{}
+
+// AcquireBuffer returns a reset bytes.Buffer with at least requested capacity
+func AcquireBuffer(cap int) *bytes.Buffer {
+	return bufferPool.Get(cap)
+}
+
+// ReleaseBuffer resets and releases provided bytes.Buffer to global BufferPool
+func ReleaseBuffer(buf *bytes.Buffer) {
+	bufferPool.Put(buf)
+}