speedup decoding considerably

Author: facchinm

src/SerialTransport.h

@@ -30,21 +30,8 @@ class SerialTransport: public ITransport {
         }
 
         size_t read(uint8_t* buffer, size_t size) override {
-
-            size_t r_size = 0;
-
-            while (_stream->available()){
-                if (r_size == size){
-                    return r_size;
-                }
-                buffer[r_size] = _stream->read();
-                r_size++;
-                // TODO the following delay is essential for GIGA to work. Is it worth making giga-specific?
-                delay(1);
-            }
-
-            return r_size;
-
+            _stream->setTimeout(0);
+            return _stream->readBytes(buffer, size);
         }
 
         size_t read_byte(uint8_t& r) override {

src/client.h

@@ -32,8 +32,9 @@ class RPCClient {
         RpcError error;
         // blocking call
         while (!decoder.get_response(msg_id, result, error)){
-            decoder.process();
-            delay(1);
+            if (!decoder.process()) {
+                delay(1);
+            }
         }
 
         lastError.code = error.code;

src/decoder.h

@@ -168,8 +168,12 @@ class RpcDecoder {
 
     }
 
-    void process(){
-        if (advance()) parse_packet();
+    bool process(){
+        if (advance()) {
+            parse_packet();
+            return true;
+        }
+        return false;
     }
 
     // Fill the raw buffer to its capacity
@@ -188,8 +192,9 @@ class RpcDecoder {
                     delay(1);
                 }
             }
+            return true;
         }
-        return true;
+        return false;
     }
 
     void parse_packet(){