[meld] help: Note performance impact of applying filters

[Kai Willadsen <kaiw src gnome org>]

commit 4dffbf708b440b862a7e8ffd361c3bcb3b851550
Author: Kai Willadsen <kai willadsen gmail com>
Date:   Tue Feb 10 06:00:00 2015 +1000

    help: Note performance impact of applying filters

 help/C/preferences.page |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/help/C/preferences.page b/help/C/preferences.page
index 3bfabac..66c1bf0 100644
--- a/help/C/preferences.page
+++ b/help/C/preferences.page
@@ -37,6 +37,10 @@
     blank line trimming option will be applied as appropriate, and differences
     in line endings will be ignored.
     </p>
+    <p>Enabling this option means that <app>Meld</app> must fully read all
+    non-binary files into memory during the folder comparison. With large text
+    files, this can be slow and may cause memory issues.
+    </p>
     <p>This option only has an effect if if "Compare files based only on size
     and timestamp" is not enabled.
     </p>