Increase default serialization buffer size

src/common/communication/clap.h

@@ -343,7 +343,7 @@ class ClapSockets final : public Sockets {
         const T& object,
         std::optional<std::pair<ClapLogger&, bool>> logging) {
         typename T::Response response_object;
-        thread_local SerializationBuffer<256> audio_thread_buffer{};
+        thread_local SerializationBuffer<2048> audio_thread_buffer{};
 
         return audio_thread_sockets_.at(object.owner_instance_id)
             .callback_.receive_into(object, response_object, logging,

src/common/communication/common.h

@@ -1110,6 +1110,8 @@ class TypedMessageHandler : public AdHocSocketHandler<Thread> {
                 // every time, but on the audio processor side we store the
                 // actual variant within an object and we then use some hackery
                 // to always keep the large process data object in memory.
+                // NOTE: Unlike the VST2 version, this persistent buffer is only
+                //       used for audio thread messages
                 thread_local SerializationBuffer<256> persistent_buffer{};
                 thread_local Request persistent_object;
 

src/common/communication/vst3.h

@@ -263,7 +263,7 @@ class Vst3Sockets final : public Sockets {
         typename T::Response& response_object,
         size_t instance_id,
         std::optional<std::pair<Vst3Logger&, bool>> logging) {
-        thread_local SerializationBuffer<256> audio_processor_buffer{};
+        thread_local SerializationBuffer<2048> audio_processor_buffer{};
 
         return audio_processor_sockets_.at(instance_id)
             .receive_into(object, response_object, logging,