No clone when rendering rss feed

components/content/src/lib.rs

@@ -26,4 +26,4 @@ mod sorting;
 pub use file_info::FileInfo;
 pub use page::Page;
 pub use section::Section;
-pub use sorting::{sort_pages, populate_siblings};
+pub use sorting::{sort_pages, populate_siblings, sort_pages_by_date};

components/content/src/sorting.rs

@@ -5,6 +5,21 @@ use rayon::prelude::*;
 use page::Page;
 use front_matter::SortBy;
 
+
+/// The comparison function of sorting pages by day
+/// Used by the RSS rendering
+/// To remove if `sort_pages` is changed to work on borrowed values
+/// This cannot be used in `sort_pages` currently as it takes &&Page instead of &Page
+pub fn sort_pages_by_date(a: &&Page, b: &&Page) -> Ordering {
+    let ord = b.meta.date().unwrap().cmp(&a.meta.date().unwrap());
+    if ord == Ordering::Equal {
+        a.permalink.cmp(&b.permalink)
+    } else {
+        ord
+    }
+}
+
+
 /// Sort pages by the given criteria
 ///
 /// Any pages that doesn't have a required field when the sorting method is other than none

components/rebuild/src/lib.rs

@@ -309,7 +309,7 @@ pub fn after_template_change(site: &mut Site, path: &Path) -> Result<()> {
 
     match filename {
         "sitemap.xml" => site.render_sitemap(),
-        "rss.xml" => site.render_rss_feed(None, None),
+        "rss.xml" => site.render_rss_feed(site.pages.values().collect(), None),
         "robots.txt" => site.render_robots(),
         "single.html" | "list.html" => site.render_taxonomies(),
         "page.html" => {

components/site/benches/site.rs

@@ -22,7 +22,7 @@ fn setup_site(name: &str) -> Site {
 
 #[bench]
 fn bench_render_aliases(b: &mut test::Bencher) {
-    let mut site = setup_site("small-blog");
+    let mut site = setup_site("big-blog");
     let tmp_dir = tempdir().expect("create temp dir");
     let public = &tmp_dir.path().join("public");
     site.set_output_path(&public);
@@ -31,7 +31,7 @@ fn bench_render_aliases(b: &mut test::Bencher) {
 
 #[bench]
 fn bench_render_sitemap(b: &mut test::Bencher) {
-    let mut site = setup_site("small-blog");
+    let mut site = setup_site("big-blog");
     let tmp_dir = tempdir().expect("create temp dir");
     let public = &tmp_dir.path().join("public");
     site.set_output_path(&public);
@@ -40,11 +40,11 @@ fn bench_render_sitemap(b: &mut test::Bencher) {
 
 #[bench]
 fn bench_render_rss_feed(b: &mut test::Bencher) {
-    let mut site = setup_site("small-blog");
+    let mut site = setup_site("big-blog");
     let tmp_dir = tempdir().expect("create temp dir");
     let public = &tmp_dir.path().join("public");
     site.set_output_path(&public);
-    b.iter(|| site.render_rss_feed(None, None).unwrap());
+    b.iter(|| site.render_rss_feed(site.pages.values().collect(), None).unwrap());
 }
 
 #[bench]

components/site/src/lib.rs

@@ -36,9 +36,9 @@ use config::{Config, get_config};
 use utils::fs::{create_file, copy_directory, create_directory, ensure_directory_exists};
 use utils::templates::{render_template, rewrite_theme_paths};
 use utils::net::get_available_port;
-use content::{Page, Section, populate_siblings, sort_pages};
+use content::{Page, Section, populate_siblings, sort_pages, sort_pages_by_date};
 use templates::{GUTENBERG_TERA, global_fns, render_redirect_template};
-use front_matter::{SortBy, InsertAnchor};
+use front_matter::{InsertAnchor};
 use taxonomies::{Taxonomy, find_taxonomies};
 use pagination::Paginator;
 
@@ -515,7 +515,7 @@ impl Site {
         self.render_orphan_pages()?;
         self.render_sitemap()?;
         if self.config.generate_rss {
-            self.render_rss_feed(None, None)?;
+            self.render_rss_feed(self.pages.values().collect(), None)?;
         }
         self.render_404()?;
         self.render_robots()?;
@@ -695,9 +695,8 @@ impl Site {
             .par_iter()
             .map(|item| {
                 if taxonomy.kind.rss {
-                    // TODO: can we get rid of `clone()`?
                     self.render_rss_feed(
-                        Some(item.pages.clone()),
+                        item.pages.iter().map(|p| p).collect(),
                         Some(&PathBuf::from(format!("{}/{}", taxonomy.kind.name, item.slug))),
                     )?;
                 }
@@ -769,27 +768,25 @@ impl Site {
     /// Renders a RSS feed for the given path and at the given path
     /// If both arguments are `None`, it will render only the RSS feed for the whole
     /// site at the root folder.
-    pub fn render_rss_feed(&self, all_pages: Option<Vec<Page>>, base_path: Option<&PathBuf>) -> Result<()> {
+    pub fn render_rss_feed(&self, all_pages: Vec<&Page>, base_path: Option<&PathBuf>) -> Result<()> {
         ensure_directory_exists(&self.output_path)?;
 
         let mut context = Context::new();
-        let pages = all_pages
+        let mut pages = all_pages
-            // TODO: avoid that cloned().
-            // It requires having `sort_pages` take references of Page
-            .unwrap_or_else(|| self.pages.values().cloned().collect::<Vec<_>>())
             .into_iter()
             .filter(|p| p.meta.date.is_some() && !p.is_draft())
             .collect::<Vec<_>>();
 
+        pages.par_sort_unstable_by(sort_pages_by_date);
+
         // Don't generate a RSS feed if none of the pages has a date
         if pages.is_empty() {
             return Ok(());
         }
 
-        let (sorted_pages, _) = sort_pages(pages, SortBy::Date);
+        context.insert("last_build_date", &pages[0].meta.date.clone().map(|d| d.to_string()));
-        context.insert("last_build_date", &sorted_pages[0].meta.date.clone().map(|d| d.to_string()));
         // limit to the last n elements
-        context.insert("pages", &sorted_pages.iter().take(self.config.rss_limit).collect::<Vec<_>>());
+        context.insert("pages", &pages.iter().take(self.config.rss_limit).collect::<Vec<_>>());
         context.insert("config", &self.config);
 
         let rss_feed_url = if let Some(ref base) = base_path {