From 2c70e914664e5afda521d306524d4e6869b57001 Mon Sep 17 00:00:00 2001
From: Bryce Kwon <bryce@brycekwon.com>
Date: Sat, 8 Aug 2026 12:50:08 -1000
Subject: Stop the index and the log repeating work

---
 source/ui-repolist.c | 55 +++++++++++++++++++++++++++++++++-------------------
 1 file changed, 35 insertions(+), 20 deletions(-)

(limited to 'source/ui-repolist.c')

diff --git a/source/ui-repolist.c b/source/ui-repolist.c
index e18e46e..e2c4abf 100644
--- a/source/ui-repolist.c
+++ b/source/ui-repolist.c
@@ -151,9 +151,11 @@ static int any_repos_visible(void)
 	return 0;
 }
 
-static void print_sort_header(const char *title, const char *sort)
+// The index url is the same for every heading and every row, so the caller
+// works it out once rather than building and freeing one per cell.
+static void print_sort_header(const char *title, const char *sort,
+			      const char *currenturl)
 {
-	char *currenturl = cgit_currenturl();
 	htmlf("<th class='left col-%s'><a href='", sort);
 	html_attr(currenturl);
 	htmlf("?s=%s", sort);
@@ -162,17 +164,16 @@ static void print_sort_header(const char *title, const char *sort)
 		html_url_arg(ctx.qry.search);
 	}
 	htmlf("'>%s</a></th>", title);
-	free(currenturl);
 }
 
-static void print_header(void)
+static void print_header(const char *currenturl)
 {
 	html("<tr class='nohover'>");
-	print_sort_header("Name", "name");
-	print_sort_header("Description", "desc");
+	print_sort_header("Name", "name", currenturl);
+	print_sort_header("Description", "desc", currenturl);
 	if (ctx.cfg.enable_index_owner)
-		print_sort_header("Owner", "owner");
-	print_sort_header("Idle", "idle");
+		print_sort_header("Owner", "owner", currenturl);
+	print_sort_header("Idle", "idle", currenturl);
 	if (ctx.cfg.enable_index_links)
 		html("<th class='left col-links'>Links</th>");
 	html("</tr>\n");
@@ -233,6 +234,19 @@ static int sort_owner(const void *a, const void *b)
 	return cmp(r1->owner, r2->owner);
 }
 
+/* Resolve every repository's modification time up front. get_repo_modtime
+ * caches into the repo it is given, but qsort moves those structs around while
+ * it sorts, so a comparator that fills the cache loses most of what it stored
+ * and stats the same repository again and again. */
+static void resolve_modtimes(void)
+{
+	time_t t;
+	int i;
+
+	for (i = 0; i < cgit_repolist.count; i++)
+		get_repo_modtime(&cgit_repolist.repos[i], &t);
+}
+
 static int sort_idle(const void *a, const void *b)
 {
 	const struct cgit_repo *r1 = a;
@@ -288,6 +302,8 @@ static int sort_repolist(char *field)
 	for (column = &sortcolumn[0]; column->name; column++) {
 		if (strcmp(field, column->name))
 			continue;
+		if (column->fn == sort_idle || column->fn == sort_section)
+			resolve_modtimes();
 		qsort(cgit_repolist.repos, cgit_repolist.count,
 			sizeof(struct cgit_repo), column->fn);
 		return 1;
@@ -302,6 +318,7 @@ void cgit_print_repolist(void)
 	char *last_section = NULL;
 	char *section;
 	char *repourl;
+	char *currenturl;
 	int sorted = 0;
 
 	if (!any_repos_visible()) {
@@ -324,6 +341,7 @@ void cgit_print_repolist(void)
 	else if (ctx.cfg.section_sort)
 		sort_repolist("section");
 
+	currenturl = cgit_currenturl();
 	html("<table class='list nowrap repolist'>");
 	for (i = 0; i < cgit_repolist.count; i++) {
 		ctx.repo = &cgit_repolist.repos[i];
@@ -335,7 +353,7 @@ void cgit_print_repolist(void)
 		if (hits > ctx.qry.ofs + ctx.cfg.max_repo_count)
 			continue;
 		if (!header++)
-			print_header();
+			print_header(currenturl);
 		section = ctx.repo->section;
 		if (section && !strcmp(section, ""))
 			section = NULL;
@@ -363,17 +381,13 @@ void cgit_print_repolist(void)
 		html("</td>");
 		if (ctx.cfg.enable_index_owner) {
 			html("<td class='col-owner'>");
-			{
-				char *currenturl = cgit_currenturl();
-				html("<a href='");
-				html_attr(currenturl);
-				html("?q=");
-				html_url_arg(ctx.repo->owner);
-				html("'>");
-				html_txt(ctx.repo->owner);
-				html("</a>");
-				free(currenturl);
-			}
+			html("<a href='");
+			html_attr(currenturl);
+			html("?q=");
+			html_url_arg(ctx.repo->owner);
+			html("'>");
+			html_txt(ctx.repo->owner);
+			html("</a>");
 			html("</td>");
 		}
 		html("<td class='col-idle'>");
@@ -392,6 +406,7 @@ void cgit_print_repolist(void)
 	html("</table>");
 	if (hits > ctx.cfg.max_repo_count)
 		print_pager(hits, ctx.cfg.max_repo_count, ctx.qry.search, ctx.qry.sort);
+	free(currenturl);
 	cgit_print_docend();
 }
 
-- 
cgit v2.8.0