www.delorie.com/gnu/docs/gcl/gcl-tk_116.html   search  
 
Buy GNU books!


Untitled Document

[ < ] [ > ]   [ << ] [ Up ] [ >> ]         [Top] [Contents] [Index] [ ? ]

"Performance Issues"

Text widgets should run efficiently under a variety of conditions. The text widget uses about 2-3 bytes of main memory for each byte of text, so texts containing a megabyte or more should be practical on most workstations. Text is represented internally with a modified B-tree structure that makes operations relatively efficient even with large texts. Tags are included in the B-tree structure in a way that allows tags to span large ranges or have many disjoint smaller ranges without loss of efficiency. Marks are also implemented in a way that allows large numbers of marks. The only known mode of operation where a text widget may not run efficiently is if it has a very large number of different tags. Hundreds of tags should be fine, or even a thousand, but tens of thousands of tags will make texts consume a lot of memory and run slowly.


  webmaster     delorie software   privacy  
  Copyright 2003   by The Free Software Foundation     Updated Jun 2003