Merge pull request #2308 from libgit2/rb/diff-update-index-stat-cache

Reduce excessive OID calculation for diff and stat

1 files changed, 28 insertions, 0 deletions

diff --git a/include/git2/sys/diff.h b/include/git2/sys/diff.h
index bc6cdf393..48d72f4f9 100644
--- a/include/git2/sys/diff.h
+++ b/include/git2/sys/diff.h
@@ -10,6 +10,8 @@
 #include "git2/common.h"
 #include "git2/types.h"
 #include "git2/oid.h"
+#include "git2/diff.h"
+#include "git2/status.h"
 
 /**
  * @file git2/sys/diff.h
@@ -58,6 +60,32 @@ GIT_EXTERN(int) git_diff_print_callback__to_file_handle(
 	const git_diff_line *line,
 	void *payload); /*< payload must be a `FILE *` */
 
+
+typedef struct {
+	unsigned int version;
+	size_t stat_calls;
+	size_t oid_calculations;
+} git_diff_perfdata;
+
+#define GIT_DIFF_PERFDATA_VERSION 1
+#define GIT_DIFF_PERFDATA_INIT {GIT_DIFF_PERFDATA_VERSION,0,0}
+
+/**
+ * Get performance data for a diff object.
+ *
+ * @param out Structure to be filled with diff performance data
+ * @param diff Diff to read performance data from
+ * @return 0 for success, <0 for error
+ */
+GIT_EXTERN(int) git_diff_get_perfdata(
+	git_diff_perfdata *out, const git_diff *diff);
+
+/**
+ * Get performance data for diffs from a git_status_list
+ */
+GIT_EXTERN(int) git_status_list_get_perfdata(
+	git_diff_perfdata *out, const git_status_list *status);
+
 /** @} */
 GIT_END_DECL
 #endif