From 7c759c766481a134cec3003d58d96841f54166fd Mon Sep 17 00:00:00 2001
From: Thulinma <jaron@vietors.com>
Date: Mon, 8 Feb 2016 16:02:23 +0100
Subject: [PATCH] Optimized getWritableIdentifier to improve the speed of
 MistInBuffer even further.

---
 lib/dtsc.h       | 2 ++
 lib/dtscmeta.cpp | 9 ++++++---
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/lib/dtsc.h b/lib/dtsc.h
index cf6752f1..4b2de033 100644
--- a/lib/dtsc.h
+++ b/lib/dtsc.h
@@ -282,6 +282,8 @@ namespace DTSC {
       int width;
       int height;
       int fpks;
+    private:
+      std::string cachedIdent;
   };
 
   ///\brief Class for storage of meta data
diff --git a/lib/dtscmeta.cpp b/lib/dtscmeta.cpp
index 4125c47c..d431f222 100644
--- a/lib/dtscmeta.cpp
+++ b/lib/dtscmeta.cpp
@@ -1376,9 +1376,11 @@ namespace DTSC {
 
   ///\brief Returns a writable identifier for a track, to prevent overwrites on readout
   std::string Track::getWritableIdentifier() {
+    if (cachedIdent.size()){return cachedIdent;}
     std::stringstream result;
     result << getIdentifier() << "_" << trackID;
-    return result.str();
+    cachedIdent = result.str();
+    return cachedIdent;
   }
 
   ///\brief Determines the "packed" size of a track
@@ -1418,8 +1420,9 @@ namespace DTSC {
 
   ///\brief Writes a track to a pointer
   void Track::writeTo(char *& p) {
-    writePointer(p, convertShort(getWritableIdentifier().size()), 2);
-    writePointer(p, getWritableIdentifier());
+    std::string trackIdent = getWritableIdentifier();
+    writePointer(p, convertShort(trackIdent.size()), 2);
+    writePointer(p, trackIdent);
     writePointer(p, "\340", 1);//Begin track object
     writePointer(p, "\000\011fragments\002", 12);
     writePointer(p, convertInt(fragments.size() * 11), 4);