perf(serde_v8): introduce Serializable boxable object (#9983)

2 files changed, 24 insertions, 0 deletions

diff --git a/serde_v8/src/lib.rs b/serde_v8/src/lib.rs
index 9413791bb..bd4b00b32 100644
--- a/serde_v8/src/lib.rs
+++ b/serde_v8/src/lib.rs
@@ -5,6 +5,7 @@ mod keys;
 mod magic;
 mod payload;
 mod ser;
+mod serializable;
 pub mod utils;
 
 pub use de::{from_v8, from_v8_cached, Deserializer};
@@ -12,3 +13,4 @@ pub use error::{Error, Result};
 pub use keys::KeyCache;
 pub use magic::Value;
 pub use ser::{to_v8, Serializer};
+pub use serializable::Serializable;
diff --git a/serde_v8/src/serializable.rs b/serde_v8/src/serializable.rs
new file mode 100644
index 000000000..2e781340b
--- /dev/null
+++ b/serde_v8/src/serializable.rs
@@ -0,0 +1,22 @@
+use rusty_v8 as v8;
+
+/// Serializable exists to allow boxing values as "objects" to be serialized later,
+/// this is particularly useful for async op-responses. This trait is a more efficient
+/// replacement for erased-serde that makes less allocations, since it's specific to serde_v8
+/// (and thus doesn't have to have generic outputs, etc...)
+pub trait Serializable {
+  fn to_v8<'a>(
+    &self,
+    scope: &mut v8::HandleScope<'a>,
+  ) -> Result<v8::Local<'a, v8::Value>, crate::Error>;
+}
+
+/// Allows all implementors of `serde::Serialize` to implement Serializable
+impl<T: serde::Serialize> Serializable for T {
+  fn to_v8<'a>(
+    &self,
+    scope: &mut v8::HandleScope<'a>,
+  ) -> Result<v8::Local<'a, v8::Value>, crate::Error> {
+    crate::to_v8(scope, self)
+  }
+}