From d8c93b40be3acfce14abeec0151db6ce2fde8091 Mon Sep 17 00:00:00 2001
From: Tobias Koppers <tobias.koppers@googlemail.com>
Date: Mon, 4 Nov 2019 10:46:33 +0100
Subject: [PATCH] faster serialization for deserialized data

---
 lib/serialization/BinaryMiddleware.js | 8 +++++++-
 lib/serialization/ObjectMiddleware.js | 8 +++++++-
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/lib/serialization/BinaryMiddleware.js b/lib/serialization/BinaryMiddleware.js
index 21574c30b..58a5601be 100644
--- a/lib/serialization/BinaryMiddleware.js
+++ b/lib/serialization/BinaryMiddleware.js
@@ -10,6 +10,8 @@ const SerializerMiddleware = require("./SerializerMiddleware");
 /** @typedef {import("./types").BufferSerializableType} BufferSerializableType */
 /** @typedef {import("./types").PrimitiveSerializableType} PrimitiveSerializableType */
 
+const SERIALIZED_INFO = Symbol("serialized info");
+
 /*
 Format:
 
@@ -86,6 +88,8 @@ const identifyNumber = n => {
  */
 class BinaryMiddleware extends SerializerMiddleware {
 	_handleFunctionSerialization(fn, context) {
+		const serializedInfo = fn[SERIALIZED_INFO];
+		if (serializedInfo) return serializedInfo;
 		return memorize(() => {
 			const r = fn();
 			if (r instanceof Promise)
@@ -96,12 +100,14 @@ class BinaryMiddleware extends SerializerMiddleware {
 	}
 
 	_handleFunctionDeserialization(fn, context) {
-		return memorize(() => {
+		const result = memorize(() => {
 			const r = fn();
 			if (r instanceof Promise)
 				return r.then(data => this.deserialize(data, context));
 			return this.deserialize(r, context);
 		});
+		result[SERIALIZED_INFO] = fn;
+		return result;
 	}
 
 	/**
diff --git a/lib/serialization/ObjectMiddleware.js b/lib/serialization/ObjectMiddleware.js
index ef4ef45f8..a37238ffa 100644
--- a/lib/serialization/ObjectMiddleware.js
+++ b/lib/serialization/ObjectMiddleware.js
@@ -18,6 +18,8 @@ const SetObjectSerializer = require("./SetObjectSerializer");
 
 /** @typedef {new (...params: any[]) => any} Constructor */
 
+const SERIALIZED_INFO = Symbol("serialized info");
+
 /*
 
 Format:
@@ -224,6 +226,8 @@ class ObjectMiddleware extends SerializerMiddleware {
 	}
 
 	_handleFunctionSerialization(fn, context) {
+		const serializedInfo = fn[SERIALIZED_INFO];
+		if (serializedInfo) return serializedInfo;
 		return memorize(() => {
 			const r = fn();
 
@@ -235,7 +239,7 @@ class ObjectMiddleware extends SerializerMiddleware {
 	}
 
 	_handleFunctionDeserialization(fn, context) {
-		return memorize(() => {
+		const result = memorize(() => {
 			const r = fn();
 
 			if (r instanceof Promise)
@@ -243,6 +247,8 @@ class ObjectMiddleware extends SerializerMiddleware {
 
 			return this.deserialize(r, context)[0];
 		});
+		result[SERIALIZED_INFO] = fn;
+		return result;
 	}
 
 	/**