perf(ast): faster Comment::is_jsdoc

crates/oxc_ast/src/ast/comment.rs

@@ -106,7 +106,7 @@ impl Comment {
     pub fn is_jsdoc(&self, source_text: &str) -> bool {
         self.is_leading()
             && self.is_block()
-            && self.content_span().source_text(source_text).starts_with('*')
+            && source_text.as_bytes()[self.content_span_start() as usize] == b'*'
     }
 
     /// Legal comments
@@ -126,9 +126,20 @@ impl Comment {
 
     /// Gets the span of the comment content.
     pub fn content_span(&self) -> Span {
+        Span::new(self.content_span_start(), self.content_span_end())
+    }
+
+    /// Gets the start span of the comment content.
+    pub fn content_span_start(&self) -> u32 {
+        self.span.start + 2
+    }
+
+    /// Gets the start span of the comment content.
+    pub fn content_span_end(&self) -> u32 {
+        let end = self.span.end;
         match self.kind {
-            CommentKind::Line => Span::new(self.span.start + 2, self.span.end),
-            CommentKind::Block => Span::new(self.span.start + 2, self.span.end - 2),
+            CommentKind::Line => end,
+            CommentKind::Block => end - 2,
         }
     }
 }