faster-er font map findings

indra/llrender/llfontfreetype.h

@@ -27,7 +27,7 @@
 #ifndef LL_LLFONTFREETYPE_H
 #define LL_LLFONTFREETYPE_H
 
-#include <unordered_map>
+#include <boost/unordered_map.hpp>
 #include "llpointer.h"
 #include "llstl.h"
 
@@ -160,7 +160,7 @@ class LLFontFreetype final : public LLRefCount, public LLTrace::MemTrackable<LLF
 	bool getKerningCache(U32 left_glyph, U32 right_glyph, F32& kerning) const;
 	void setKerningCache(U32 left_glyph, U32 right_glyph, F32 kerning) const;
 
-	mutable std::unordered_map<U64, F32> mKerningCache;
+	mutable boost::unordered_map<U64, F32> mKerningCache;
 
 	std::string mName;
 
@@ -181,7 +181,7 @@ class LLFontFreetype final : public LLRefCount, public LLTrace::MemTrackable<LLF
 	BOOL mIsFallback;
 	font_vector_t mFallbackFonts; // A list of fallback fonts to look for glyphs in (for Unicode chars)
 
-	typedef std::unordered_map<llwchar, LLFontGlyphInfo*> char_glyph_info_map_t;
+	typedef boost::unordered_map<llwchar, LLFontGlyphInfo*> char_glyph_info_map_t;
 	mutable char_glyph_info_map_t mCharGlyphInfoMap; // Information about glyph location in bitmap
 
 	mutable LLFontBitmapCache* mFontBitmapCachep;