* code (that used the heap and subsequently freed the memory) into the
* data file. Note that many other system libraries may allocate
* and free memory from the heap for arbitrary uses. E.g., stdio may
- * use the heap for file I/O buffers. This initialization step comes
- * at some performance cost so some applications may want to disable
+ * use the heap for file I/O buffers. This initialization step has a
+ * modest performance cost so some applications may want to disable
* it using this flag. This option can be a problem for applications
* which handle sensitive data like passwords, and it makes memory
* checkers like Valgrind noisy. This flag is not needed with #MDB_WRITEMAP,