Merge branch 'zh/format-ref-array-optim'

"git (branch|tag) --format=..." has been micro-optimized.

* zh/format-ref-array-optim:
  ref-filter: reuse output buffer
  ref-filter: get rid of show_ref_array_item

builtin/branch.c

@@ -411,6 +411,8 @@ static void print_ref_list(struct ref_filter *filter, struct ref_sorting *sortin
 {
 	int i;
 	struct ref_array array;
+	struct strbuf out = STRBUF_INIT;
+	struct strbuf err = STRBUF_INIT;
 	int maxwidth = 0;
 	const char *remote_prefix = "";
 	char *to_free = NULL;
@@ -440,8 +442,8 @@ static void print_ref_list(struct ref_filter *filter, struct ref_sorting *sortin
 	ref_array_sort(sorting, &array);
 
 	for (i = 0; i < array.nr; i++) {
-		struct strbuf out = STRBUF_INIT;
-		struct strbuf err = STRBUF_INIT;
+		strbuf_reset(&err);
+		strbuf_reset(&out);
 		if (format_ref_array_item(array.items[i], format, &out, &err))
 			die("%s", err.buf);
 		if (column_active(colopts)) {
@@ -452,10 +454,10 @@ static void print_ref_list(struct ref_filter *filter, struct ref_sorting *sortin
 			fwrite(out.buf, 1, out.len, stdout);
 			putchar('\n');
 		}
-		strbuf_release(&err);
-		strbuf_release(&out);
 	}
 
+	strbuf_release(&err);
+	strbuf_release(&out);
 	ref_array_clear(&array);
 	free(to_free);
 }

builtin/for-each-ref.c

@@ -22,6 +22,8 @@ int cmd_for_each_ref(int argc, const char **argv, const char *prefix)
 	struct ref_array array;
 	struct ref_filter filter;
 	struct ref_format format = REF_FORMAT_INIT;
+	struct strbuf output = STRBUF_INIT;
+	struct strbuf err = STRBUF_INIT;
 
 	struct option opts[] = {
 		OPT_BIT('s', "shell", &format.quote_style,
@@ -80,8 +82,17 @@ int cmd_for_each_ref(int argc, const char **argv, const char *prefix)
 
 	if (!maxcount || array.nr < maxcount)
 		maxcount = array.nr;
-	for (i = 0; i < maxcount; i++)
-		show_ref_array_item(array.items[i], &format);
+	for (i = 0; i < maxcount; i++) {
+		strbuf_reset(&err);
+		strbuf_reset(&output);
+		if (format_ref_array_item(array.items[i], &format, &output, &err))
+			die("%s", err.buf);
+		fwrite(output.buf, 1, output.len, stdout);
+		putchar('\n');
+	}
+
+	strbuf_release(&err);
+	strbuf_release(&output);
 	ref_array_clear(&array);
 	return 0;
 }

builtin/tag.c

@@ -39,6 +39,8 @@ static int list_tags(struct ref_filter *filter, struct ref_sorting *sorting,
 		     struct ref_format *format)
 {
 	struct ref_array array;
+	struct strbuf output = STRBUF_INIT;
+	struct strbuf err = STRBUF_INIT;
 	char *to_free = NULL;
 	int i;
 
@@ -63,8 +65,17 @@ static int list_tags(struct ref_filter *filter, struct ref_sorting *sorting,
 	filter_refs(&array, filter, FILTER_REFS_TAGS);
 	ref_array_sort(sorting, &array);
 
-	for (i = 0; i < array.nr; i++)
-		show_ref_array_item(array.items[i], format);
+	for (i = 0; i < array.nr; i++) {
+		strbuf_reset(&output);
+		strbuf_reset(&err);
+		if (format_ref_array_item(array.items[i], format, &output, &err))
+			die("%s", err.buf);
+		fwrite(output.buf, 1, output.len, stdout);
+		putchar('\n');
+	}
+
+	strbuf_release(&err);
+	strbuf_release(&output);
 	ref_array_clear(&array);
 	free(to_free);
 

ref-filter.c

@@ -2435,27 +2435,22 @@ int format_ref_array_item(struct ref_array_item *info,
 	return 0;
 }
 
-void show_ref_array_item(struct ref_array_item *info,
-			 const struct ref_format *format)
-{
-	struct strbuf final_buf = STRBUF_INIT;
-	struct strbuf error_buf = STRBUF_INIT;
-
-	if (format_ref_array_item(info, format, &final_buf, &error_buf))
-		die("%s", error_buf.buf);
-	fwrite(final_buf.buf, 1, final_buf.len, stdout);
-	strbuf_release(&error_buf);
-	strbuf_release(&final_buf);
-	putchar('\n');
-}
-
 void pretty_print_ref(const char *name, const struct object_id *oid,
 		      const struct ref_format *format)
 {
 	struct ref_array_item *ref_item;
+	struct strbuf output = STRBUF_INIT;
+	struct strbuf err = STRBUF_INIT;
+
 	ref_item = new_ref_array_item(name, oid);
 	ref_item->kind = ref_kind_from_refname(name);
-	show_ref_array_item(ref_item, format);
+	if (format_ref_array_item(ref_item, format, &output, &err))
+		die("%s", err.buf);
+	fwrite(output.buf, 1, output.len, stdout);
+	putchar('\n');
+
+	strbuf_release(&err);
+	strbuf_release(&output);
 	free_array_item(ref_item);
 }
 

ref-filter.h

@@ -119,8 +119,6 @@ int format_ref_array_item(struct ref_array_item *info,
 			  const struct ref_format *format,
 			  struct strbuf *final_buf,
 			  struct strbuf *error_buf);
-/*  Print the ref using the given format and quote_style */
-void show_ref_array_item(struct ref_array_item *info, const struct ref_format *format);
 /*  Parse a single sort specifier and add it to the list */
 void parse_ref_sorting(struct ref_sorting **sorting_tail, const char *atom);
 /*  Callback function for parsing the sort option */