diff --git a/libraries/script-engine/src/ScriptValueUtils.cpp b/libraries/script-engine/src/ScriptValueUtils.cpp
index a7641b9b87..4929093821 100644
--- a/libraries/script-engine/src/ScriptValueUtils.cpp
+++ b/libraries/script-engine/src/ScriptValueUtils.cpp
@@ -34,6 +34,12 @@
 #include "ScriptValueIterator.h"
 #include "ScriptEngineLogging.h"
 
+#define CONVERSIONS_OPTIMIZED_FOR_V8
+
+#ifdef CONVERSIONS_OPTIMIZED_FOR_V8
+#include "v8/FastScriptValueUtils.h"
+#endif
+
 bool isListOfStrings(const ScriptValue& arg) {
     if (!arg.isArray()) {
         return false;
@@ -59,7 +65,11 @@ void registerMetaTypes(ScriptEngine* engine) {
     scriptRegisterMetaType<QVector3D, qVector3DToScriptValue, qVector3DFromScriptValue>(engine);
 
     scriptRegisterMetaType<glm::vec2, vec2ToScriptValue, vec2FromScriptValue>(engine);
+#ifdef CONVERSIONS_OPTIMIZED_FOR_V8
+    scriptRegisterMetaType<glm::vec3, vec3ToScriptValueFast, vec3FromScriptValueFast>(engine);
+#else
     scriptRegisterMetaType<glm::vec3, vec3ToScriptValue, vec3FromScriptValue>(engine);
+#endif
     scriptRegisterMetaType<glm::u8vec3, u8vec3ToScriptValue, u8vec3FromScriptValue>(engine);
     scriptRegisterMetaType<glm::vec4, vec4toScriptValue, vec4FromScriptValue>(engine);
     scriptRegisterMetaType<glm::quat, quatToScriptValue, quatFromScriptValue>(engine);
@@ -117,7 +127,11 @@ bool qVector2DFromScriptValue(const ScriptValue& object, QVector2D& qVector2D) {
 
 ScriptValue qVector3DToScriptValue(ScriptEngine* engine, const QVector3D& qVector3D) {
     glm::vec3 vec3(qVector3D.x(), qVector3D.y(), qVector3D.z());
+#ifdef CONVERSIONS_OPTIMIZED_FOR_V8
+    return vec3ToScriptValueFast(engine, vec3);
+#else
     return vec3ToScriptValue(engine, vec3);
+#endif
 }
 
 bool qVector3DFromScriptValue(const ScriptValue& object, QVector3D& qVector3D) {
@@ -456,7 +470,11 @@ ScriptValue qVectorVec3ColorToScriptValue(ScriptEngine* engine, const QVector<gl
 ScriptValue qVectorVec3ToScriptValue(ScriptEngine* engine, const QVector<glm::vec3>& vector) {
     ScriptValue array = engine->newArray();
     for (int i = 0; i < vector.size(); i++) {
+#ifdef CONVERSIONS_OPTIMIZED_FOR_V8
+        array.setProperty(i, vec3ToScriptValueFast(engine, vector.at(i)));
+#else
         array.setProperty(i, vec3ToScriptValue(engine, vector.at(i)));
+#endif
     }
     return array;
 }
@@ -776,9 +794,17 @@ bool qURLFromScriptValue(const ScriptValue& object, QUrl& url) {
 
 ScriptValue pickRayToScriptValue(ScriptEngine* engine, const PickRay& pickRay) {
     ScriptValue obj = engine->newObject();
+#ifdef CONVERSIONS_OPTIMIZED_FOR_V8
+    ScriptValue origin = vec3ToScriptValueFast(engine, pickRay.origin);
+#else
     ScriptValue origin = vec3ToScriptValue(engine, pickRay.origin);
+#endif
     obj.setProperty("origin", origin);
+#ifdef CONVERSIONS_OPTIMIZED_FOR_V8
+    ScriptValue direction = vec3ToScriptValueFast(engine, pickRay.direction);
+#else
     ScriptValue direction = vec3ToScriptValue(engine, pickRay.direction);
+#endif
     obj.setProperty("direction", direction);
     return obj;
 }
@@ -824,9 +850,15 @@ ScriptValue collisionToScriptValue(ScriptEngine* engine, const Collision& collis
     obj.setProperty("type", collision.type);
     obj.setProperty("idA", quuidToScriptValue(engine, collision.idA));
     obj.setProperty("idB", quuidToScriptValue(engine, collision.idB));
+#ifdef CONVERSIONS_OPTIMIZED_FOR_V8
+    obj.setProperty("penetration", vec3ToScriptValueFast(engine, collision.penetration));
+    obj.setProperty("contactPoint", vec3ToScriptValueFast(engine, collision.contactPoint));
+    obj.setProperty("velocityChange", vec3ToScriptValueFast(engine, collision.velocityChange));
+#else
     obj.setProperty("penetration", vec3ToScriptValue(engine, collision.penetration));
     obj.setProperty("contactPoint", vec3ToScriptValue(engine, collision.contactPoint));
     obj.setProperty("velocityChange", vec3ToScriptValue(engine, collision.velocityChange));
+#endif
     return obj;
 }
 
diff --git a/libraries/script-engine/src/v8/FastScriptValueUtils.cpp b/libraries/script-engine/src/v8/FastScriptValueUtils.cpp
new file mode 100644
index 0000000000..f5b5f44c37
--- /dev/null
+++ b/libraries/script-engine/src/v8/FastScriptValueUtils.cpp
@@ -0,0 +1,187 @@
+//
+//  FastScriptValueUtils.cpp
+//  libraries/script-engine/src/v8/FastScriptValueUtils.cpp
+//
+//  Created by dr Karol Suprynowicz on 2023/03/30.
+//  Copyright 2023 Overte e.V.
+//
+//  Distributed under the Apache License, Version 2.0.
+//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
+//
+
+#include "FastScriptValueUtils.h"
+
+#include <qcolor.h>
+
+#include "../ScriptEngine.h"
+#include "V8Types.h"
+#include "ScriptValueV8Wrapper.h"
+
+ScriptValue vec3ToScriptValueFast(ScriptEngine* engine, const glm::vec3& vec3) {
+    auto prototype = engine->globalObject().property("__hifi_vec3__");
+    if (!prototype.hasProperty("defined") || !prototype.property("defined").toBool()) {
+        prototype = engine->evaluate(
+            "__hifi_vec3__ = Object.defineProperties({}, { "
+            "defined: { value: true },"
+            "0: { set: function(nv) { return this.x = nv; }, get: function() { return this.x; } },"
+            "1: { set: function(nv) { return this.y = nv; }, get: function() { return this.y; } },"
+            "2: { set: function(nv) { return this.z = nv; }, get: function() { return this.z; } },"
+            "r: { set: function(nv) { return this.x = nv; }, get: function() { return this.x; } },"
+            "g: { set: function(nv) { return this.y = nv; }, get: function() { return this.y; } },"
+            "b: { set: function(nv) { return this.z = nv; }, get: function() { return this.z; } },"
+            "red: { set: function(nv) { return this.x = nv; }, get: function() { return this.x; } },"
+            "green: { set: function(nv) { return this.y = nv; }, get: function() { return this.y; } },"
+            "blue: { set: function(nv) { return this.z = nv; }, get: function() { return this.z; } }"
+            "})");
+    }
+    ScriptValue value = engine->newObject();
+
+    ScriptValueV8Wrapper *proxy = ScriptValueV8Wrapper::unwrap(value);
+
+    auto engineV8 = proxy->getV8Engine();
+
+    auto isolate = engineV8->getIsolate();
+    v8::Locker locker(isolate);
+    v8::Isolate::Scope isolateScope(isolate);
+    v8::HandleScope handleScope(isolate);
+    auto context = engineV8->getContext();
+    v8::Context::Scope contextScope(engineV8->getContext());
+    V8ScriptValue v8ScriptValue = proxy->toV8Value();
+    v8::Local<v8::Object> v8Object = v8::Local<v8::Object>::Cast(v8ScriptValue.get());
+
+    if (!v8Object->Set(context, v8::String::NewFromUtf8(isolate, "x").ToLocalChecked(), v8::Number::New(isolate, vec3.x)).FromMaybe(false)) {
+        Q_ASSERT(false);
+    }
+    if (!v8Object->Set(context, v8::String::NewFromUtf8(isolate, "y").ToLocalChecked(), v8::Number::New(isolate, vec3.y)).FromMaybe(false)) {
+        Q_ASSERT(false);
+    }
+    if (!v8Object->Set(context, v8::String::NewFromUtf8(isolate, "z").ToLocalChecked(), v8::Number::New(isolate, vec3.z)).FromMaybe(false)) {
+        Q_ASSERT(false);
+    }
+
+    auto v8Prototype = ScriptValueV8Wrapper::fullUnwrap(engineV8, prototype);
+    if (!v8Object->SetPrototype(context, v8Prototype.get()).FromMaybe(false)) {
+        Q_ASSERT(false);
+    }
+    value.setPrototype(prototype);
+    return value;
+}
+
+bool vec3FromScriptValueFast(const ScriptValue& object, glm::vec3& vec3) {
+    ScriptValueV8Wrapper *proxy = ScriptValueV8Wrapper::unwrap(object);
+
+    auto engineV8 = proxy->getV8Engine();
+
+    auto isolate = engineV8->getIsolate();
+    v8::Locker locker(isolate);
+    v8::Isolate::Scope isolateScope(isolate);
+    v8::HandleScope handleScope(isolate);
+    auto context = engineV8->getContext();
+    v8::Context::Scope contextScope(engineV8->getContext());
+    V8ScriptValue v8ScriptValue = proxy->toV8Value();
+
+    v8::Local<v8::Value> v8Value = v8ScriptValue.get();
+
+
+    if (v8Value->IsNumber()) {
+        vec3 = glm::vec3(v8Value->NumberValue(context).ToChecked());
+    } else if (v8Value->IsString()) {
+        QColor qColor(QString(*v8::String::Utf8Value(isolate, v8::Local<v8::String>::Cast(v8Value))));
+        if (qColor.isValid()) {
+            vec3.x = qColor.red();
+            vec3.y = qColor.green();
+            vec3.z = qColor.blue();
+        } else {
+            return false;
+        }
+    } else if (v8Value->IsArray()) {
+        auto array = v8::Local<v8::Array>::Cast(v8Value);
+        //QVariantList list = object.toVariant().toList();
+        if (array->Length() == 3) {
+            v8::Local<v8::Value> xValue,yValue,zValue;
+            if (!array->Get(context, 0).ToLocal(&xValue)) {
+                return false;
+            }
+            if (!array->Get(context, 1).ToLocal(&yValue)) {
+                return false;
+            }
+            if (!array->Get(context, 2).ToLocal(&zValue)) {
+                return false;
+            }
+            //V8TODO:
+            if (xValue->IsNullOrUndefined() || yValue->IsNullOrUndefined() || zValue->IsNullOrUndefined()) {
+                return false;
+            }
+            double x,y,z;
+            if (!xValue->NumberValue(context).To(&x)
+                || !yValue->NumberValue(context).To(&y)
+                || !zValue->NumberValue(context).To(&z)) {
+                return false;
+            }
+
+            vec3.x = xValue->NumberValue(context).FromMaybe(0.0);
+            vec3.y = yValue->NumberValue(context).FromMaybe(0.0);
+            vec3.z = zValue->NumberValue(context).FromMaybe(0.0);
+        } else {
+            return false;
+        }
+    } else if (v8Value->IsObject()) {
+        v8::Local<v8::Object> v8Object = v8::Local<v8::Object>::Cast(v8Value);
+        v8::Local<v8::Value> xValue;
+        if (!v8Object->Get(context, v8::String::NewFromUtf8(isolate, "x").ToLocalChecked()).ToLocal(&xValue)) {
+            Q_ASSERT(false);
+        }
+        if (xValue->IsNullOrUndefined()) {
+            if (!v8Object->Get(context, v8::String::NewFromUtf8(isolate, "r").ToLocalChecked()).ToLocal(&xValue)) {
+                Q_ASSERT(false);
+            }
+        }
+        if (xValue->IsNullOrUndefined()) {
+            if (!v8Object->Get(context, v8::String::NewFromUtf8(isolate, "red").ToLocalChecked()).ToLocal(&xValue)) {
+                Q_ASSERT(false);
+            }
+        }
+
+        v8::Local<v8::Value> yValue;
+        if (!v8Object->Get(context, v8::String::NewFromUtf8(isolate, "y").ToLocalChecked()).ToLocal(&yValue)) {
+            Q_ASSERT(false);
+        }
+        if (yValue->IsNullOrUndefined()) {
+            if (!v8Object->Get(context, v8::String::NewFromUtf8(isolate, "g").ToLocalChecked()).ToLocal(&yValue)) {
+                Q_ASSERT(false);
+            }
+        }
+        if (yValue->IsNullOrUndefined()) {
+            if (!v8Object->Get(context, v8::String::NewFromUtf8(isolate, "green").ToLocalChecked()).ToLocal(&yValue)) {
+                Q_ASSERT(false);
+            }
+        }
+
+        v8::Local<v8::Value> zValue;
+        if (!v8Object->Get(context, v8::String::NewFromUtf8(isolate, "z").ToLocalChecked()).ToLocal(&zValue)) {
+            Q_ASSERT(false);
+        }
+        if (zValue->IsNullOrUndefined()) {
+            if (!v8Object->Get(context, v8::String::NewFromUtf8(isolate, "b").ToLocalChecked()).ToLocal(&zValue)) {
+                Q_ASSERT(false);
+            }
+        }
+        if (zValue->IsNullOrUndefined()) {
+            if (!v8Object->Get(context, v8::String::NewFromUtf8(isolate, "blue").ToLocalChecked()).ToLocal(&zValue)) {
+                Q_ASSERT(false);
+            }
+        }
+
+        //f (!x.isValid() || !y.isValid() || !z.isValid()) {
+            // V8TODO: This breaks the sit script for some reason
+            //return false;
+        //}
+
+        vec3.x = xValue->NumberValue(context).FromMaybe(0.0);
+        vec3.y = yValue->NumberValue(context).FromMaybe(0.0);
+        vec3.z = zValue->NumberValue(context).FromMaybe(0.0);
+    } else {
+        return false;
+    }
+    return true;
+}
diff --git a/libraries/script-engine/src/v8/FastScriptValueUtils.h b/libraries/script-engine/src/v8/FastScriptValueUtils.h
new file mode 100644
index 0000000000..8401f9ab36
--- /dev/null
+++ b/libraries/script-engine/src/v8/FastScriptValueUtils.h
@@ -0,0 +1,26 @@
+//
+//  FastScriptValueUtils.cpp
+//  libraries/script-engine/src/v8/FastScriptValueUtils.cpp
+//
+//  Created by dr Karol Suprynowicz on 2023/03/30.
+//  Copyright 2023 Overte e.V.
+//
+//  Distributed under the Apache License, Version 2.0.
+//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
+//
+
+// Contains V8-specific implementations of th
+
+#ifndef overte_FastScriptValueUtils_h
+#define overte_FastScriptValueUtils_h
+
+#include <glm/glm.hpp>
+#include <glm/gtc/quaternion.hpp>
+
+#include "../ScriptValue.h"
+
+ScriptValue vec3ToScriptValueFast(ScriptEngine* engine, const glm::vec3& vec3);
+
+bool vec3FromScriptValueFast(const ScriptValue& object, glm::vec3& vec3);
+
+#endif  // overte_FastScriptValueUtils_h
diff --git a/libraries/script-engine/src/v8/ScriptValueV8Wrapper.cpp b/libraries/script-engine/src/v8/ScriptValueV8Wrapper.cpp
index fe9581507b..40a36b2e66 100644
--- a/libraries/script-engine/src/v8/ScriptValueV8Wrapper.cpp
+++ b/libraries/script-engine/src/v8/ScriptValueV8Wrapper.cpp
@@ -423,7 +423,8 @@ void ScriptValueV8Wrapper::setPrototype(const ScriptValue& prototype) {
     v8::Locker locker(isolate);
     v8::Isolate::Scope isolateScope(isolate);
     v8::HandleScope handleScope(isolate);
-    v8::Context::Scope contextScope(_engine->getContext());
+    auto context = _engine->getContext();
+    v8::Context::Scope contextScope(context);
     ScriptValueV8Wrapper* unwrappedPrototype = unwrap(prototype);
     if (unwrappedPrototype) {
         if(unwrappedPrototype->toV8Value().constGet()->IsNullOrUndefined() && _value.constGet()->IsNullOrUndefined()) {
@@ -432,7 +433,7 @@ void ScriptValueV8Wrapper::setPrototype(const ScriptValue& prototype) {
         if(unwrappedPrototype->toV8Value().constGet()->IsObject() && _value.constGet()->IsObject()) {
             auto object = v8::Local<v8::Object>::Cast(_value.get());
             //V8TODO: I don't know which context to use here
-            v8::Maybe<bool> retVal = object->SetPrototype(_engine->getContext(), unwrappedPrototype->toV8Value().constGet());
+            v8::Maybe<bool> retVal = object->SetPrototype(context, unwrappedPrototype->toV8Value().constGet());
             //v8::Maybe<bool> retVal = object->SetPrototype(_value.getContext(), unwrappedPrototype->toV8Value().constGet());
             if (retVal.IsJust() ? !retVal.FromJust() : true){
                 qCDebug(scriptengine_v8) << "Failed to assign prototype";
diff --git a/libraries/script-engine/src/v8/ScriptValueV8Wrapper.h b/libraries/script-engine/src/v8/ScriptValueV8Wrapper.h
index 305554e64d..d174d91703 100644
--- a/libraries/script-engine/src/v8/ScriptValueV8Wrapper.h
+++ b/libraries/script-engine/src/v8/ScriptValueV8Wrapper.h
@@ -36,6 +36,7 @@ public: // construction
     static ScriptValueV8Wrapper* unwrap(const ScriptValue& val);
     inline const V8ScriptValue& toV8Value() const { return _value; }
     static V8ScriptValue fullUnwrap(ScriptEngineV8* engine, const ScriptValue& value);
+    ScriptEngineV8* getV8Engine() {return _engine;}
 
 public:
     virtual void release() override;