ITStudio_OUC/OxideJS
Archived
0
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

perf: IC hit/miss 路径 depth=0 快速路径内联，跳过 proto 遍历函数调用

Browse Source
This commit is contained in:
爱特每羊队
2026-06-30 23:45:52 +08:00
parent b5104fcb0c
commit bb16d50f84
3 changed files with 52 additions and 18 deletions
Download Patch File Download Diff File Expand all files Collapse all files
crates/oxide_vm/src/dispatch/property.rs
+28 -15
View File
@@ -207,23 +207,36 @@ impl Vm {
prop_cache_miss();
ic_debug!("IC_GET miss shape={} prop={}", obj.shape_id(), prop_name_si);
let resolved = self.ordinary_get(obj, prop_name_si, val)?;
// Walk proto chain to find which object actually owns this property.
let mut cursor = obj_ptr;
let mut depth = 0u8;
loop {
let co = unsafe { &*cursor };
if let Some(pos) = self.kernel_core.shape_forge().lookup_position(co.shape_id(), prop_name_si) {
if !co.is_accessor_meta(pos) {
ic_helper::write_ic_back(&mut self.bytecode, self.pc, co.shape_id(), pos, depth);
ic_debug!("IC_GET write-back shape={} slot={} depth={}", co.shape_id(), pos, depth);
// Try own property first (fast path, depth=0).
if let Some(pos) = self.kernel_core.shape_forge().lookup_position(obj.shape_id(), prop_name_si) {
if !obj.is_accessor_meta(pos) {
ic_helper::write_ic_back(&mut self.bytecode, self.pc, obj.shape_id(), pos, 0);
ic_debug!("IC_GET write-back own shape={} slot={}", obj.shape_id(), pos);
}
} else {
// Walk proto chain to find which object actually owns this property.
let mut cursor = obj.proto().as_js_object_ptr();
let mut depth = 1u8;
while !cursor.is_null() {
let co_ref = unsafe { &*cursor };
if let Some(pos) = self.kernel_core.shape_forge().lookup_position(co_ref.shape_id(), prop_name_si) {
if !co_ref.is_accessor_meta(pos) {
ic_helper::write_ic_back(&mut self.bytecode, self.pc, co_ref.shape_id(), pos, depth);
ic_debug!(
"IC_GET write-back proto shape={} slot={} depth={}",
co_ref.shape_id(),
pos,
depth
);
}
break;
}
break;
if !co_ref.proto().is_object() {
break;
}
cursor = co_ref.proto().as_js_object_ptr();
depth += 1;
}
if !co.proto().is_object() {
break;
}
cursor = co.proto().as_js_object_ptr();
depth += 1;
}
self.regs[a] = resolved;
}