From 469e87eaf31c94ffa57381536fe38f08c7341893 Mon Sep 17 00:00:00 2001
From: Glint Dev <dev@glint.local>
Date: Fri, 24 Jul 2026 16:47:02 +0300
Subject: [PATCH] phase 7.3: parallel @each using rayon (feature gate,
 threshold >= 10 items)

---
 src/interpreter/mod.rs | 35 +++++++++++++++++++++++++++++++++--
 1 file changed, 33 insertions(+), 2 deletions(-)

diff --git a/src/interpreter/mod.rs b/src/interpreter/mod.rs
index c432a89..adda157 100644
--- a/src/interpreter/mod.rs
+++ b/src/interpreter/mod.rs
@@ -427,13 +427,44 @@ impl Interpreter {
 
                     let child_refs: Vec<&Element<'a>> = el.children.iter().collect();
 
+                    #[cfg(feature = "parallel")]
+                    if items.len() >= 10 {
+                        use rayon::prelude::*;
+                        let var_name_owned = var_name.to_string();
+                        let vars_snapshot = variables.clone();
+                        let results: Vec<Vec<Element<'a>>> = items
+                            .par_iter()
+                            .map(|item| {
+                                let mut local_vars = vars_snapshot.clone();
+                                local_vars.insert(var_name_owned.clone(), Value::Str(CompactString::new(item)));
+                                Self::evaluate_vdom_incr(
+                                    &child_refs, &mut local_vars, components, rhei, stylesheet, ancestors, dirty_set,
+                                )
+                            })
+                            .collect();
+                        for result in results {
+                            output.extend(result);
+                        }
+                    } else {
+                        for item in items {
+                            let old_val = variables.insert(var_name.to_string(), Value::Str(CompactString::new(item)));
+                            output.extend(Self::evaluate_vdom_incr(
+                                &child_refs, variables, components, rhei, stylesheet, ancestors, dirty_set,
+                            ));
+                            if let Some(old) = old_val {
+                                variables.insert(var_name.to_string(), old);
+                            } else {
+                                variables.remove(var_name);
+                            }
+                        }
+                    }
+
+                    #[cfg(not(feature = "parallel"))]
                     for item in items {
                         let old_val = variables.insert(var_name.to_string(), Value::Str(CompactString::new(item)));
-
                         output.extend(Self::evaluate_vdom_incr(
                             &child_refs, variables, components, rhei, stylesheet, ancestors, dirty_set,
                         ));
-
                         if let Some(old) = old_val {
                             variables.insert(var_name.to_string(), old);
                         } else {