Improve ConfigNode load/save perf (#88)

* Rewrite PreFormatConfig to iterate through strings as little as possible.

* Improve logging, add @siimav's parallel processing bit (seems to be strictly slower even for 1m+ rows, tho)

* Patch writing, too, for a slight improvement in perf

* Fix a lingering issue with trailing braces

* Patch on startup, not after MM. Skipping keys will only happen after MM, but they're really just there for sfs loading, can't trust what's in gamedatabase enough to skip parsing there.

* Update readme and Settings

* Big improvements to save perf by not writing lines / flushing / using a puny buffer.

* missed a newline

GameData/KSPCommunityFixes/Settings.cfg

@@ -295,6 +295,18 @@ KSP_COMMUNITY_FIXES
   // and every time you delete a vessel in the Tracking Station
   FewerSaves = false
 
+  // These settings will make ConfigNode's loader not bother doing
+  // Extended checking during parsing for keys named ths
+  CONFIGNODE_PERF_SKIP_PROCESSING_KEYS
+  {
+    item = serialized_plugin
+  }
+  // or for keys that start with this.
+  CONFIGNODE_PERF_SKIP_PROCESSING_SUBSTRINGS
+  {
+    item = **skipProc**
+  }
+
   // The stock ModuleAsteroidDrill and ModuleCometDrill do a lot of unnecessary iterating over all
   // PartModules on the vessel to see if an asteroid or comet is attached.
   // ModuleResourceHarvester already keeps a cache of this information, and all the stock drills

KSPCommunityFixes/KSPCommunityFixes.csproj

@@ -138,6 +138,7 @@
     <Compile Include="Modding\OnSymmetryFieldChanged.cs" />
     <Compile Include="Modding\ReflectionTypeLoadExceptionHandler.cs" />
     <Compile Include="Performance\FewerSaves.cs" />
+    <Compile Include="Performance\ConfigNodePerf.cs" />
     <Compile Include="Performance\PQSCoroutineLeak.cs" />
     <Compile Include="Performance\PQSUpdateNoMemoryAlloc.cs" />
     <Compile Include="Performance\ProgressTrackingSpeedBoost.cs" />