From bf886bac73ad348ab7bc333e6eae824c96e9abde Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Donny/=EA=B0=95=EB=8F=99=EC=9C=A4?= <kdy1997.dev@gmail.com>
Date: Wed, 20 Oct 2021 00:00:48 +0900
Subject: [PATCH] perf(es/parser): Make typescript parser faster (#2483)

swc_ecma_parser:
 - Check for option before backtracking.
---
 Cargo.lock                           | 2 +-
 ecmascript/parser/Cargo.toml         | 2 +-
 ecmascript/parser/src/parser/expr.rs | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index 5bd3df2dc83..1fd4133fb2b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2710,7 +2710,7 @@ dependencies = [
 
 [[package]]
 name = "swc_ecma_parser"
-version = "0.75.0"
+version = "0.75.1"
 dependencies = [
  "either",
  "enum_kind",
diff --git a/ecmascript/parser/Cargo.toml b/ecmascript/parser/Cargo.toml
index be51a68c47f..409d93b9bb4 100644
--- a/ecmascript/parser/Cargo.toml
+++ b/ecmascript/parser/Cargo.toml
@@ -7,7 +7,7 @@ include = ["Cargo.toml", "src/**/*.rs", "examples/**/*.rs"]
 license = "Apache-2.0/MIT"
 name = "swc_ecma_parser"
 repository = "https://github.com/swc-project/swc.git"
-version = "0.75.0"
+version = "0.75.1"
 
 [package.metadata.docs.rs]
 all-features = true
diff --git a/ecmascript/parser/src/parser/expr.rs b/ecmascript/parser/src/parser/expr.rs
index 291d1c38659..49eacd6b78e 100644
--- a/ecmascript/parser/src/parser/expr.rs
+++ b/ecmascript/parser/src/parser/expr.rs
@@ -35,7 +35,7 @@ impl<'a, I: Tokens> Parser<I> {
     pub(super) fn parse_assignment_expr(&mut self) -> PResult<Box<Expr>> {
         trace_cur!(self, parse_assignment_expr);
 
-        if self.input.syntax().typescript() {
+        if self.input.syntax().typescript() && self.input.syntax().jsx() {
             // Note: When the JSX plugin is on, type assertions (`<T> x`) aren't valid
             // syntax.