ring_buffer: Reduce resizing frequency

rt/include/typon/fundamental/deque.hpp

@@ -84,7 +84,7 @@ namespace typon::fdt::lock_free
         _bottom.store(bottom + 1, relaxed);
       }
       u64 capacity = array->capacity();
-      if (capacity > u64(1) << _bits && capacity > (bottom - top) * 4)
+      if (capacity > u64(1) << _bits && capacity > (bottom - top) * 8)
       {
         x.set_state(Prune);
       }

rt/include/typon/fundamental/ring_buffer.hpp

@@ -63,7 +63,7 @@ namespace typon::fdt::lock_free
 
     ring_buffer * grow(u64 start, u64 end) noexcept
     {
-      auto buffer = new ring_buffer(std::countr_one(_mask) + 1, this);
+      auto buffer = new ring_buffer(std::countr_one(_mask) + 2, this);
       return fill(buffer, start, end);
     }
 
@@ -72,7 +72,7 @@ namespace typon::fdt::lock_free
       ring_buffer * last = nullptr;
       auto next = this;
       auto size = (end - start);
-      auto threshold = size * 2;
+      auto threshold = size * 4;
       while (next->_next && next->_next->capacity() >= threshold)
       {
         last = next;