@Robk-Blue said: Yes I’m using tab setting of 2. The problem seems to be weirder that just application processing tab characters differently because it’s not uniform. That tells me that you probably have a mix of spaces and tabs, without realizing it. In Notepad++, use View > Show Symbol > Show Space and Tab. You will see a middot • for spaces, and an arrow → for tabs… the width of the arrow will grow to fit the remaining space in the tab-spacing [image: 1793293737638-b2bb93e2-ae0e-4350-a0df-1708f84dd276-image.jpeg] (2 spaces)display: block; (8 spaces)font-family: Arial; (4 spaces)text-align: right; (4 spaces)font-size: 20px; So what this tells me is that your actual file, in Notpead++, is really as follows, with your WordPress being set to show 4 spaces per tab instead of two: [SPACE][SPACE]display: block; [TAB][TAB]font-family: Arial; [SPACE][TAB]text-align: right; [SPACE][TAB]font-size: 20px; Though the 8-wide version being two tabs surprises me, because that wouldn’t look aligned properly in Notepad++ [image: 1793294204910-8cac1852-6a8b-4cfd-8a8b-635c5b5185ab-image.jpeg] But my guess is it’s similar to that, if not that exactly.

That’s a clever little experiment! I never really thought about using regular expressions to represent mathematical patterns like multiples of 3, but it makes sense when you look at the binary sequence. Definitely a fun way to explore just how powerful regex can be beyond ordinary text searching.

Hi guy038, interesting series of runs, thanks! Both runs without threads, the 2 m one and most likely the 1 m 28 s one too (see below), are slower than the 1 m 13 s with auto. So the threads do help on your key, even if cold runs vary quite a bit. Yes, the quotes are expected. LoadThreads is stored as text because it can also be "auto", and the quotes are removed when the file is read, so 0 and "0" mean the same. What changed your 8 back to 0 is something else: MultiReplace reads its INI file once at startup and, once its panel has been opened, writes all its settings back when Notepad++ closes. An edit made in the meantime is therefore overwritten on exit. So your 1 m 28 s run most likely still used LoadThreads=0. To test 8: change the line either in Notepad++ before opening MultiReplace, or with another editor while Notepad++ is closed. Then restart Notepad++, and the new value is used. Curiously, in my experience with other tools, four to six parallel threads were always the optimum.