diff --git a/platformio.ini b/platformio.ini
index 21dbd08..a820882 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -127,8 +127,12 @@ lib_deps =
     ; #85 (packet-carrying AnnounceHandler callback), the announce-queue
     ; drain without which an interface forwards no further announce after
     ; the cap first makes it queue one, attermann/microStore#6 (close the
-    ; active segment before compaction) and the store sweep fix without
-    ; which every reboot empties the path table on a clock-less device.
+    ; active segment before compaction), the store sweep fix without
+    ; which every reboot empties the path table on a clock-less device,
+    ; and the iterator holding its segment file open across a walk instead
+    ; of reopening it per record — on LittleFS an open replays the
+    ; directory's metadata log, so a 200-record walk cost 32 s and tripped
+    ; the task watchdog; it costs about 6 s now.
     ; Both retimesh/combined branches are upstream master + those branches
     ; (+ a <cstdint> include fix in microReticulum).
     microReticulum=https://github.com/dobrevit/microReticulum.git#retimesh/combined