render optimizations (#585)

packages/core-macro/src/lib.rs

@@ -65,8 +65,15 @@ pub fn rsx_without_templates(s: TokenStream) -> TokenStream {
 pub fn render(s: TokenStream) -> TokenStream {
     match syn::parse::<rsx::CallBody>(s) {
         Err(err) => err.to_compile_error().into(),
-        Ok(body) => quote::quote! {
-            cx.render(#body)
+        Ok(body) => {
+            let mut inner = proc_macro2::TokenStream::new();
+            body.to_tokens_without_lazynodes(&mut inner);
+            quote::quote! {
+                {
+                    let __cx = NodeFactory::new(&cx.scope);
+                    Some(#inner)
+                }
+            }
         }
         .into_token_stream()
         .into(),

packages/rsx/src/lib.rs

@@ -67,20 +67,9 @@ impl Parse for CallBody {
 /// Serialize the same way, regardless of flavor
 impl ToTokens for CallBody {
     fn to_tokens(&self, out_tokens: &mut TokenStream2) {
-        let template = TemplateBuilder::from_roots(self.roots.clone());
-        let inner = if let Some(template) = template {
-            quote! { #template }
-        } else {
-            let children = &self.roots;
-            if children.len() == 1 {
-                let inner = &self.roots[0];
-                quote! { #inner }
-            } else {
-                quote! { __cx.fragment_root([ #(#children),* ]) }
-            }
-        };
+        let mut inner = TokenStream2::new();
+        self.to_tokens_without_lazynodes(&mut inner);
 
-        // Otherwise we just build the LazyNode wrapper
         out_tokens.append_all(quote! {
             LazyNodes::new(move |__cx: NodeFactory| -> VNode {
                 use dioxus_elements::{GlobalAttributes, SvgAttributes};
@@ -107,4 +96,20 @@ impl CallBody {
             })
         })
     }
+
+    pub fn to_tokens_without_lazynodes(&self, out_tokens: &mut TokenStream2) {
+        let template = TemplateBuilder::from_roots(self.roots.clone());
+        let inner = if let Some(template) = template {
+            quote! { #template }
+        } else {
+            let children = &self.roots;
+            if children.len() == 1 {
+                let inner = &self.roots[0];
+                quote! { #inner }
+            } else {
+                quote! { __cx.fragment_root([ #(#children),* ]) }
+            }
+        };
+        out_tokens.append_all(inner);
+    }
 }