Hi Paulo,
On 6/21/2012 8:56 AM, Paulo Levi wrote:
Hi. I've noticed that DefaultStyledDocument has a slowness issue when
inserting text. Even if you subclass it and expose the faster method:
protected void insert(int offset, ElementSpec[] data)
Before fixing the performance issue it usually needs to have some
performance statistics, like:
- What is the difference between time execution or memory usage for
code with the fix and without the fix for text with different length
- Text with which length is commonly used in this method
- How often this method is used in real cases
- Is the most performance degradation is localized in this method
or may be where are other narrow places which have performance issues
during a text manipulation
Thanks,
Alexandr.
the body of the method still uses a stringbuilder to append all char[]
inside of the data before actually inserting into the content.
This is because the only method for insertion in the default content
interface is:
public UndoableEdit insertString(int where, String str)
Now if there are going to be extension methods in java 8, it would be
nice to have a
public UndoableEdit insert(int where, int index, int length, char[]
str) default {
return insert(where, new String(index, length, str);
}
with a adequate specialization in GapContent (that obviously doesn't
call the string version), and that that new method is used in the
protected void insert(int offset, ElementSpec[] data)
method (and where it makes sense)
