Komodo edit , freez for seconds

when i edit file using through FTP , it works fine but as soon as komodo edit lost focus for another window ,
and i start using it again , it halt for seconds ,
i use linux

here is my log

[2015-07-22 09:53:17,616] [ERROR] console-logger: ReferenceError: nsITreeView is not defined (2) in chrome://komodo/content/dialogs/filebrowser/filebrowseview.js:156
Traceback (most recent call last):
File “chrome://komodo/content/dialogs/filebrowser/filebrowseview.js”, line 156, in

[2015-07-22 09:53:29,856] [ERROR] console-logger: ReferenceError: nsITreeView is not defined (2) in chrome://komodo/content/dialogs/filebrowser/filebrowseview.js:156
Traceback (most recent call last):
File “chrome://komodo/content/dialogs/filebrowser/filebrowseview.js”, line 156, in

[2015-07-22 09:53:29,858] [ERROR] console-logger: ReferenceError: nsITreeView is not defined (2) in chrome://komodo/content/dialogs/filebrowser/filebrowseview.js:156
Traceback (most recent call last):
File “chrome://komodo/content/dialogs/filebrowser/filebrowseview.js”, line 156, in

[2015-07-22 09:53:31,461] [ERROR] console-logger: ReferenceError: nsITreeView is not defined (2) in chrome://komodo/content/dialogs/filebrowser/filebrowseview.js:156
Traceback (most recent call last):
File “chrome://komodo/content/dialogs/filebrowser/filebrowseview.js”, line 156, in

[2015-07-22 09:53:31,464] [ERROR] console-logger: ReferenceError: nsITreeView is not defined (2) in chrome://komodo/content/dialogs/filebrowser/filebrowseview.js:156
Traceback (most recent call last):
File “chrome://komodo/content/dialogs/filebrowser/filebrowseview.js”, line 156, in

[2015-07-22 09:53:49,135] [WARNING] koScintillaSchemeService: applyScheme:: no indicator for name ‘collab_remote_cursor_4’
[2015-07-22 09:53:49,135] [WARNING] koScintillaSchemeService: applyScheme:: no indicator for name ‘collab_remote_cursor_5’
[2015-07-22 09:53:49,135] [WARNING] koScintillaSchemeService: applyScheme:: no indicator for name ‘collab_remote_cursor_2’
[2015-07-22 09:53:49,135] [WARNING] koScintillaSchemeService: applyScheme:: no indicator for name ‘collab_remote_cursor_3’
[2015-07-22 09:53:49,136] [WARNING] koScintillaSchemeService: applyScheme:: no indicator for name ‘collab_remote_cursor_1’
[2015-07-22 09:53:49,137] [WARNING] koScintillaSchemeService: applyScheme:: no indicator for name ‘collab_remote_change’
[2015-07-22 09:53:49,137] [WARNING] koScintillaSchemeService: applyScheme:: no indicator for name ‘collab_local_change’
[2015-07-22 09:53:49,199] [WARNING] koLanguageServiceBase.indenting: Found non-positive guess of 0 (min 1)
[2015-07-22 09:54:11,327] [WARNING] koScintillaSchemeService: applyScheme:: no indicator for name ‘collab_remote_cursor_4’
[2015-07-22 09:54:11,327] [WARNING] koScintillaSchemeService: applyScheme:: no indicator for name ‘collab_remote_cursor_5’
[2015-07-22 09:54:11,327] [WARNING] koScintillaSchemeService: applyScheme:: no indicator for name ‘collab_remote_cursor_2’
[2015-07-22 09:54:11,327] [WARNING] koScintillaSchemeService: applyScheme:: no indicator for name ‘collab_remote_cursor_3’
[2015-07-22 09:54:11,328] [WARNING] koScintillaSchemeService: applyScheme:: no indicator for name ‘collab_remote_cursor_1’
[2015-07-22 09:54:11,329] [WARNING] koScintillaSchemeService: applyScheme:: no indicator for name ‘collab_remote_change’
[2015-07-22 09:54:11,329] [WARNING] koScintillaSchemeService: applyScheme:: no indicator for name ‘collab_local_change’

It’s a known problem. You can try a workaround:
Open Preferences - Editor and uncheck Detect when files are changed outside the environment