Improve rendering performance

Cargo.lock

@@ -444,7 +444,7 @@ dependencies = [
 
 [[package]]
 name = "snekdown"
-version = "0.2.2"
+version = "0.2.3"
 dependencies = [
  "crossbeam-utils 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "htmlescape 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "snekdown"
-version = "0.2.2"
+version = "0.2.3"
 authors = ["trivernis <trivernis@protonmail.com>"]
 edition = "2018"
 license-file = "LICENSE"

src/format/html.rs

@@ -97,9 +97,8 @@ impl ToHtml for Section {
     fn to_html(&self) -> String {
         let inner = self
             .elements
-            .par_iter()
+            .iter()
-            .map(|e| e.to_html())
+            .fold("".to_string(), |a, b| format!("{}{}", a, b.to_html()));
-            .reduce(|| "".to_string(), |a, b| format!("{}{}", a, b));
         format!("<section>{}{}</section>", self.header.to_html(), inner)
     }
 }