#1304 threshold for size difference

[Michael Bechtold]

While you can exclude too small or too large files already, one important feature I could not find in WinMerge nor in RFEs: specify a threshold value for "identity".
Example: threshold set to 1kb, so files with 2000 and 2500 B sizes would be considered identical and not show up the in folder difference list at all, while 2000 and 3500 would be considered different.

[Michael Bechtold]

PS: as a "cheap" workaround you can add a column type "size difference" and make it sortable

[Takashi Sawanaka]

This can already be achieved using existing features.

In the Options window, go to Compare → Folder, set Compare method to Existence, and set Additional comparison condition to:

abs(LeftSize - RightSize) < 1KB

With this setting, files whose size difference is below the threshold will be treated as identical (see attached screenshots).

As an alternative workaround, although it may be slower, you can use
Tools → Customize Columns…, add Size via Additional Properties, and then enable Size (Diff) as shown in the screenshots. This allows you to sort by size difference and manually ignore small differences.