change array growth algorithm to reduce allocs and copies r=alecf,sr=waterson 59279

db/mork/src/morkArray.cpp

@@ -159,8 +159,10 @@ morkArray::Grow(morkEnv* ev, mork_size inNewSize)
   {
     if ( mArray_Fill <= mArray_Size ) // fill and size fit the invariant?
     {
-      if ( inNewSize - mArray_Size < 3 ) // actually want a few more slots?
+      if (mArray_Size <= 3)
         inNewSize = mArray_Size + 3;
+      else
+        inNewSize = mArray_Size  * 2;// + 3;  // try doubling size here - used to grow by 3
         
       mdb_size newByteSize = inNewSize * sizeof(void*);
       void** newBlock = 0;

db/mork/src/morkMap.cpp

@@ -500,7 +500,7 @@ mork_bool morkMap::grow(morkEnv* ev)
 {
   if ( mMap_Heap ) /* can we grow the map? */
   {
-    mork_num newSlots = ((mMap_Slots * 4) / 3) + 1; /* +33% */
+    mork_num newSlots = (mMap_Slots * 2); /* +100% */
     morkHashArrays old; /* a place to temporarily hold all the old arrays */
     if ( this->new_arrays(ev, &old, newSlots) ) /* have more? */
     {