Merge branch 'jk/commit-buffer-length'

Move "commit->buffer" out of the in-core commit object and keep
track of their lengths.  Use this to optimize the code paths to
validate GPG signatures in commit objects.

* jk/commit-buffer-length:
  reuse cached commit buffer when parsing signatures
  commit: record buffer length in cache
  commit: convert commit->buffer to a slab
  commit-slab: provide a static initializer
  use get_commit_buffer everywhere
  convert logmsg_reencode to get_commit_buffer
  use get_commit_buffer to avoid duplicate code
  use get_cached_commit_buffer where appropriate
  provide helpers to access the commit buffer
  provide a helper to set the commit buffer
  provide a helper to free commit buffer
  sequencer: use logmsg_reencode in get_message
  logmsg_reencode: return const buffer
  do not create "struct commit" with xcalloc
  commit: push commit_index update into alloc_commit_node
  alloc: include any-object allocations in alloc_report
  replace dangerous uses of strbuf_attach
  commit_tree: take a pointer/len pair rather than a const strbuf

1 files changed, 16 insertions, 7 deletions

diff --git a/alloc.c b/alloc.c
index f3ee745695..eb22a45c9d 100644
--- a/alloc.c
+++ b/alloc.c
@@ -47,23 +47,32 @@ union any_object {
 
 DEFINE_ALLOCATOR(blob, struct blob)
 DEFINE_ALLOCATOR(tree, struct tree)
-DEFINE_ALLOCATOR(commit, struct commit)
+DEFINE_ALLOCATOR(raw_commit, struct commit)
 DEFINE_ALLOCATOR(tag, struct tag)
 DEFINE_ALLOCATOR(object, union any_object)
 
+void *alloc_commit_node(void)
+{
+	static int commit_count;
+	struct commit *c = alloc_raw_commit_node();
+	c->index = commit_count++;
+	return c;
+}
+
 static void report(const char *name, unsigned int count, size_t size)
 {
 	fprintf(stderr, "%10s: %8u (%"PRIuMAX" kB)\n",
 			name, count, (uintmax_t) size);
 }
 
-#define REPORT(name)	\
-    report(#name, name##_allocs, name##_allocs * sizeof(struct name) >> 10)
+#define REPORT(name, type)	\
+    report(#name, name##_allocs, name##_allocs * sizeof(type) >> 10)
 
 void alloc_report(void)
 {
-	REPORT(blob);
-	REPORT(tree);
-	REPORT(commit);
-	REPORT(tag);
+	REPORT(blob, struct blob);
+	REPORT(tree, struct tree);
+	REPORT(raw_commit, struct commit);
+	REPORT(tag, struct tag);
+	REPORT(object, union any_object);
 }