plumbing: TreeWalker performance improvement, bufio pool for objects

Removes path.Clean and path.Join, as they're expensive in comparison to basic
string manipulation that can be used here.

Adds bufio.Buffer pool to be used by tag, tree and commit object decoding.

Signed-off-by: Arran Walker <arran.walker@fiveturns.org>

1 files changed, 12 insertions, 0 deletions

diff --git a/plumbing/object/common.go b/plumbing/object/common.go
new file mode 100644
index 0000000..3591f5f
--- /dev/null
+++ b/plumbing/object/common.go
@@ -0,0 +1,12 @@
+package object
+
+import (
+	"bufio"
+	"sync"
+)
+
+var bufPool = sync.Pool{
+	New: func() interface{} {
+		return bufio.NewReader(nil)
+	},
+}