diff --git a/cli/benches/benchmark.rs b/cli/benches/benchmark.rs
index 7983bde5..9cb4f275 100644
--- a/cli/benches/benchmark.rs
+++ b/cli/benches/benchmark.rs
@@ -61,11 +61,6 @@ fn main() {
     let mut all_error_speeds = Vec::new();
 
     for (language_name, example_paths) in EXAMPLE_PATHS_BY_LANGUAGE_NAME.iter() {
-        // TODO - remove after fixing slow error parsing HTML.
-        if language_name == "html" {
-            continue;
-        }
-
         if let Some(filter) = LANGUAGE_FILTER.as_ref() {
             if language_name != filter.as_str() {
                 continue;
diff --git a/cli/src/loader.rs b/cli/src/loader.rs
index 23a55cc6..b6e23a3a 100644
--- a/cli/src/loader.rs
+++ b/cli/src/loader.rs
@@ -233,7 +233,8 @@ impl Loader {
                     .arg("-I")
                     .arg(header_path)
                     .arg("-o")
-                    .arg(&library_path);
+                    .arg(&library_path)
+                    .arg("-O2");
                 if let Some(scanner_path) = scanner_path.as_ref() {
                     if scanner_path.extension() == Some("c".as_ref()) {
                         command.arg("-xc").arg("-std=c99").arg(scanner_path);