Optimized Print::print(String&) (part 2)

Author: cmaglie

build/shared/revisions.txt

@@ -11,6 +11,7 @@ ARDUINO 1.5.6 BETA
 [core]
 * sam: Fixed wrap-around bug in delay() (Mark Tillotson)
 * sam: Fixed regression in analogRead() (fails to read multiple channels) (Mark Tillotson)
+* Optimized Print::print(String&) method, now uses internal string buffer to perform block write
 
 ARDUINO 1.5.5 BETA 2013.11.28
 

hardware/arduino/sam/cores/arduino/Print.cpp

@@ -46,11 +46,7 @@ size_t Print::print(const __FlashStringHelper *ifsh)
 
 size_t Print::print(const String &s)
 {
-  size_t n = 0;
-  for (uint16_t i = 0; i < s.length(); i++) {
-    n += write(s[i]);
-  }
-  return n;
+  return write(reinterpret_cast<const uint8_t*>(s.c_str()), s.length());
 }
 
 size_t Print::print(const char str[])