From 5513f0e2fb8d94640e17c25993638f5c1c2e3368 Mon Sep 17 00:00:00 2001
From: pjh456 <147148383@qq.com>
Date: Thu, 13 Aug 2026 14:48:19 +0800
Subject: [PATCH] =?UTF-8?q?perf:=20parse=5Fjs=5Fnumber=20=E5=8E=BB=20lower?=
 =?UTF-8?q?case=20=E5=88=86=E9=85=8D=20+=20int32=20=E4=BD=8D=E8=BF=90?=
 =?UTF-8?q?=E7=AE=97=E7=9B=B4=E5=8F=96=EF=BC=88B2/B6=EF=BC=89?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 crates/oxide_runtime_api/src/lib.rs | 21 +++++++++++----------
 crates/oxide_vm/src/vm.rs           |  6 ++++++
 2 files changed, 17 insertions(+), 10 deletions(-)

diff --git a/crates/oxide_runtime_api/src/lib.rs b/crates/oxide_runtime_api/src/lib.rs
index 66f52c9..3391649 100644
--- a/crates/oxide_runtime_api/src/lib.rs
+++ b/crates/oxide_runtime_api/src/lib.rs
@@ -245,15 +245,16 @@ fn parse_js_number(s: &str) -> f64 {
     if t.is_empty() {
         return 0.0;
     }
-    let lower = t.to_ascii_lowercase();
-    if let Some(digits) = lower.strip_prefix("0x") {
-        return parse_radix_int(digits, 16);
+    let b = t.as_bytes();
+    // 前缀探测按字节直接比较（ASCII 大小写不敏感），避免每次转换分配 lowercase。
+    if b.len() >= 2 && b[0] == b'0' && (b[1] == b'x' || b[1] == b'X') {
+        return parse_radix_int(&t[2..], 16);
     }
-    if let Some(digits) = lower.strip_prefix("0o") {
-        return parse_radix_int(digits, 8);
+    if b.len() >= 2 && b[0] == b'0' && (b[1] == b'o' || b[1] == b'O') {
+        return parse_radix_int(&t[2..], 8);
     }
-    if let Some(digits) = lower.strip_prefix("0b") {
-        return parse_radix_int(digits, 2);
+    if b.len() >= 2 && b[0] == b'0' && (b[1] == b'b' || b[1] == b'B') {
+        return parse_radix_int(&t[2..], 2);
     }
     if t == "Infinity" || t == "+Infinity" {
         return f64::INFINITY;
@@ -263,9 +264,9 @@ fn parse_js_number(s: &str) -> f64 {
     }
     // 十进制语法仅允许数字、符号、小数点与指数 e；含其它字符的令牌（如
     // inf/nan 变体）不是合法 StringNumericLiteral，一律 NaN。
-    if !t
-        .chars()
-        .all(|c| c.is_ascii_digit() || c == '+' || c == '-' || c == '.' || c == 'e' || c == 'E')
+    if !b
+        .iter()
+        .all(|&c| c.is_ascii_digit() || c == b'+' || c == b'-' || c == b'.' || c == b'e' || c == b'E')
     {
         return f64::NAN;
     }
diff --git a/crates/oxide_vm/src/vm.rs b/crates/oxide_vm/src/vm.rs
index 36d32d5..e04b046 100644
--- a/crates/oxide_vm/src/vm.rs
+++ b/crates/oxide_vm/src/vm.rs
@@ -505,6 +505,9 @@ impl Vm {
     }
 
     pub(crate) fn coerce_int32_bounded(&mut self, value: JsValue) -> Result<i32, String> {
+        if value.is_int() {
+            return Ok(value.as_int());
+        }
         let n = self.coerce_number_bounded(value)?;
         if n == 0.0 || !n.is_finite() {
             return Ok(0);
@@ -518,6 +521,9 @@ impl Vm {
     }
 
     pub(crate) fn coerce_uint32_bounded(&mut self, value: JsValue) -> Result<u32, String> {
+        if value.is_int() {
+            return Ok(value.as_int() as u32);
+        }
         let n = self.coerce_number_bounded(value)?;
         if n == 0.0 || !n.is_finite() {
             return Ok(0);