maintner: intern git commit messages
Many revisions of git commits in Gerrit have the same commit message.
Share that memory.
Saves 11 MB (387 MB -> 376 MB).
Change-Id: I39f05cf309404f0b1d55c296a2fe551eb501ae9c
Reviewed-on: https://go-review.googlesource.com/38718
Reviewed-by: Kevin Burke <kev@inburke.com>
diff --git a/maintner/git.go b/maintner/git.go
index 22c5168..28e0b25 100644
--- a/maintner/git.go
+++ b/maintner/git.go
@@ -270,7 +270,7 @@
gc := &gitCommit{
hash: hash,
parents: make([]gitHash, 0, bytes.Count(hdr, parentSpace)),
- msg: string(msg),
+ msg: c.strb(msg),
}
if commit.DiffTree != nil {
gc.files = commit.DiffTree.File
diff --git a/maintner/maintner.go b/maintner/maintner.go
index 1f4ff24..6f54f56 100644
--- a/maintner/maintner.go
+++ b/maintner/maintner.go
@@ -94,6 +94,13 @@
return s
}
+func (c *Corpus) strb(b []byte) string {
+ if v, ok := c.strIntern[string(b)]; ok {
+ return v
+ }
+ return c.str(string(b))
+}
+
func (c *Corpus) SetDebug() {
c.debug = true
}
