diff --git a/Cargo.lock b/Cargo.lock
index deddfef7..ea34afc3 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1095,7 +1095,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_builtins"
-version = "0.6.3"
+version = "0.6.4"
 dependencies = [
  "chrono",
  "fast-float",
@@ -1120,7 +1120,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_bytecode"
-version = "0.6.3"
+version = "0.6.4"
 dependencies = [
  "num-bigint",
  "oxide_log",
@@ -1128,7 +1128,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_cfg"
-version = "0.6.3"
+version = "0.6.4"
 dependencies = [
  "oxide_bytecode",
  "oxide_emit",
@@ -1139,7 +1139,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_cli"
-version = "0.6.3"
+version = "0.6.4"
 dependencies = [
  "ansi_term",
  "bumpalo",
@@ -1159,7 +1159,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_code_cache"
-version = "0.6.3"
+version = "0.6.4"
 dependencies = [
  "lru",
  "oxide_bytecode",
@@ -1168,7 +1168,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_compiler"
-version = "0.6.3"
+version = "0.6.4"
 dependencies = [
  "oxide_bytecode",
  "oxide_cfg",
@@ -1187,7 +1187,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_dce"
-version = "0.6.3"
+version = "0.6.4"
 dependencies = [
  "oxide_bytecode",
  "oxide_cfg",
@@ -1201,7 +1201,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_emit"
-version = "0.6.3"
+version = "0.6.4"
 dependencies = [
  "num-bigint",
  "oxc_allocator",
@@ -1216,7 +1216,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_ir"
-version = "0.6.3"
+version = "0.6.4"
 dependencies = [
  "oxide_bytecode",
  "oxide_log",
@@ -1225,7 +1225,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_kernel"
-version = "0.6.3"
+version = "0.6.4"
 dependencies = [
  "bumpalo",
  "dashmap",
@@ -1240,7 +1240,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_liveness"
-version = "0.6.3"
+version = "0.6.4"
 dependencies = [
  "oxide_bytecode",
  "oxide_cfg",
@@ -1252,7 +1252,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_log"
-version = "0.6.3"
+version = "0.6.4"
 dependencies = [
  "tracing",
  "tracing-appender",
@@ -1261,7 +1261,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_parser"
-version = "0.6.3"
+version = "0.6.4"
 dependencies = [
  "oxc_allocator",
  "oxc_ast",
@@ -1276,7 +1276,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_regalloc"
-version = "0.6.3"
+version = "0.6.4"
 dependencies = [
  "oxide_bytecode",
  "oxide_cfg",
@@ -1292,7 +1292,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_runtime_api"
-version = "0.6.3"
+version = "0.6.4"
 dependencies = [
  "num-bigint",
  "num-traits",
@@ -1304,7 +1304,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_test262"
-version = "0.6.3"
+version = "0.6.4"
 dependencies = [
  "oxide_bytecode",
  "oxide_compiler",
@@ -1321,7 +1321,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_types"
-version = "0.6.3"
+version = "0.6.4"
 dependencies = [
  "bumpalo",
  "hashbrown 0.14.5",
@@ -1333,7 +1333,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_vm"
-version = "0.6.3"
+version = "0.6.4"
 dependencies = [
  "bumpalo",
  "chrono",
diff --git a/Cargo.toml b/Cargo.toml
index 3d590a47..1b287e61 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -22,7 +22,7 @@ members = [
 ]
 
 [workspace.package]
-version = "0.6.3"
+version = "0.6.4"
 edition = "2021"
 license = "MIT"
 rust-version = "1.80"
diff --git a/crates/oxide_vm/tests/microbench.rs b/crates/oxide_vm/tests/microbench.rs
index b3c228ae..f26cfcf5 100644
--- a/crates/oxide_vm/tests/microbench.rs
+++ b/crates/oxide_vm/tests/microbench.rs
@@ -1,6 +1,6 @@
 //! 毫秒级热路径微基准套件：方向性过滤器，不是门禁。
 //!
-//! 十个 JS 循环用例加两个 intern 直调用例；JS 用例每用例 1 个预热 run 加 3 个测量
+//! 十一个 JS 循环用例加两个 intern 直调用例；JS 用例每用例 1 个预热 run 加 3 个测量
 //! run，每 run 均为同一模块的 `Vm::run`（新建 VM 共享同一 KernelCore，免每用例重建
 //! builtin world），3 轮取中位；intern 用例为 Rust 直调，三轮各二万五千次取中位，
 //! 未命中用例每轮换新键（同一键第二轮起走命中快路径，中位即被命中成本污染）。
@@ -21,7 +21,7 @@
 //! 预热 run 的作用是分配器、代码缓存与表代际预热，不是 IC 预热。
 //!
 //! 循环规模按「debug 全套件执行段 5 秒内」约束调参：debug 构建每指令税高（无内联、
-//! 分派 match 开销主导），各用例单轮 30 至 130 毫秒，十二用例合计约 4.7 秒。
+//! 分派 match 开销主导），各用例单轮 28 至 126 毫秒，十三用例合计约 4.8 秒。
 //! 规模不是测量语义的一部分，方向判定只依赖相对变化，跨宿主对比绝对值无意义。
 //!
 //! 日常入口 `cargo test -p oxide_vm micro`（名称过滤）；
@@ -235,6 +235,18 @@ fn micro_gc_churn() {
     measure_case("gc_churn", &churn_kernel(), &module, 500, 250_500.0, true);
 }
 
+/// 纯对象字面量循环：两键字面量构造加属性读（gc_object 形态），覆盖对象构造
+/// 热路径（静态键装载期预内部化、构造期直读侧表）与 GC churn。debug 实测每迭代
+/// 约 77 微秒（端到端 gc_object 每迭代约 2.5 微秒的三十倍），按五秒预算取七百
+/// 迭代（方向判定只依赖相对变化，规模不改变相对差）。
+#[test]
+fn micro_object_literal() {
+    let source = "var sum = 0; for (var i = 0; i < 700; i++) { \
+                  var obj = { a: i, b: i * 2 }; sum += obj.a + obj.b; } sum";
+    let module = compile_module(source);
+    measure_case("object_literal", &shared_kernel(), &module, 700, 733_950.0, false);
+}
+
 // ── intern 直调用例（Rust 直调，分配成本微基准同款范式）──────────────────────
 
 /// intern 直调固定次数：五万次。十万次口径下全套件执行段超五秒预算，