refactor(codegen): replace daachorse with string match for annotati…

…on comment

Cargo.toml

@@ -136,7 +136,6 @@ console_error_panic_hook = "0.1.7"
 convert_case = "0.6.0"
 cow-utils = "0.1.3"
 criterion2 = { version = "1.1.1", default-features = false }
-daachorse = { version = "1.0.0" }
 dashmap = "6.1.0"
 encoding_rs = "0.8.34"
 encoding_rs_io = "0.1.7"

crates/oxc_codegen/Cargo.toml

@@ -31,9 +31,7 @@ oxc_syntax = { workspace = true, features = ["to_js_string"] }
 assert-unchecked = { workspace = true }
 bitflags = { workspace = true }
 cow-utils = { workspace = true }
-daachorse = { workspace = true }
 nonmax = { workspace = true }
-once_cell = { workspace = true }
 rustc-hash = { workspace = true }
 
 [dev-dependencies]

crates/oxc_codegen/src/comment.rs

@@ -1,18 +1,10 @@
-use daachorse::DoubleArrayAhoCorasick;
-use once_cell::sync::Lazy;
 use rustc_hash::FxHashMap;
 
 use oxc_ast::{Comment, CommentKind};
 use oxc_syntax::identifier::is_line_terminator;
 
 use crate::Codegen;
 
-static ANNOTATION_MATCHER: Lazy<DoubleArrayAhoCorasick<usize>> = Lazy::new(|| {
-    let patterns = vec!["#__NO_SIDE_EFFECTS__", "@__NO_SIDE_EFFECTS__", "@__PURE__", "#__PURE__"];
-
-    DoubleArrayAhoCorasick::new(patterns).unwrap()
-});
-
 pub(crate) type CommentsMap = FxHashMap</* attached_to */ u32, Vec<Comment>>;
 
 impl<'a> Codegen<'a> {
@@ -113,8 +105,10 @@ impl<'a> Codegen<'a> {
     }
 
     fn is_annotation_comment(&self, comment: &Comment) -> bool {
-        let comment_content = comment.span.source_text(self.source_text);
-        ANNOTATION_MATCHER.find_iter(comment_content).count() != 0
+        let s = comment.span.source_text(self.source_text);
+        s.split_once("__PURE__")
+            .or_else(|| s.split_once("__NO_SIDE_EFFECTS__"))
+            .is_some_and(|(s, _)| s.ends_with(['@', '#']))
     }
 
     pub(crate) fn print_annotation_comments(&mut self, node_start: u32) {