Performance optimizations in the column cache of the code generator, and

especially the sqlite3ExprCacheRemove() routine.

FossilOrigin-Name: e35b345cf858018ae0c07f79725f8d58062168db

src/sqliteInt.h

@@ -2814,6 +2814,7 @@ struct Parse {
   u8 hasCompound;      /* Need to invoke convertCompoundSelectToSubquery() */
   u8 okConstFactor;    /* OK to factor out constants */
   u8 disableLookaside; /* Number of times lookaside has been disabled */
+  u8 nColCache;        /* Number of entries in aColCache[] */
   int aTempReg[8];     /* Holding area for temporary registers */
   int nRangeReg;       /* Size of the temporary register block */
   int iRangeReg;       /* First register in temporary register block */