route-update: skip history merge for IP-only lists

Resolve history accumulation (20 snapshots + sort -u) is only useful for domain lists where DNS round-robin returns different IPs each time. For IP/subnet-only lists (like antifilter-ip6 with 127k entries), every snapshot is identical, making the merge a waste of ~77 minutes. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

route-update: skip history merge for IP-only lists
775d24e5 · Vitaly Lipatov · 91b1d47f · 775d24e5
Commit 775d24e5 authored Mar 05, 2026 by Vitaly Lipatov
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Showing with 17 additions and 13 deletions

route-update.sh router/route-update.sh +17 -13

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--- a/router/route-update.sh
+++ b/router/route-update.sh
@@ -552,19 +552,23 @@ resolve_list_file()
    [ "$_bad" -gt 0 ] && log "$_tag$_label WARNING: filtered out $_bad invalid entries from DNS resolve" || true
    rm -f "$_resolved_new.tmp"
-    # Accumulate resolve history (DNS round-robin)
+    # Accumulate resolve history (DNS round-robin) — only for lists with domains
-    local history_dir="$STATE_DIR/$_state/resolve_history"
+    if grep -v '^#' "$_f" | grep -q '[a-zA-Z]' ; then
-    mkdir -p "$history_dir"
+        local history_dir="$STATE_DIR/$_state/resolve_history"
-    rm -f "$history_dir/$HISTORY_SIZE"
+        mkdir -p "$history_dir"
-    local i=$((HISTORY_SIZE - 1))
+        rm -f "$history_dir/$HISTORY_SIZE"
-    while [ $i -ge 1 ] ; do
+        local i=$((HISTORY_SIZE - 1))
-        [ -f "$history_dir/$i" ] && mv "$history_dir/$i" "$history_dir/$((i + 1))"
+        while [ $i -ge 1 ] ; do
-        i=$((i - 1))
+            [ -f "$history_dir/$i" ] && mv "$history_dir/$i" "$history_dir/$((i + 1))"
-    done
+            i=$((i - 1))
-    cp "$_resolved_new" "$history_dir/1"
+        done
-    sort -u "$history_dir"/* > "${_resolved_new}.merged"
+        cp "$_resolved_new" "$history_dir/1"
-    mv "${_resolved_new}.merged" "$_resolved_new"
+        sort -u "$history_dir"/* > "${_resolved_new}.merged"
-    vlog "$_tag$_label resolve history: $(ls "$history_dir" | wc -l) snapshots, $(wc -l < "$_resolved_new") unique IPs"
+        mv "${_resolved_new}.merged" "$_resolved_new"
+        vlog "$_tag$_label resolve history: $(ls "$history_dir" | wc -l) snapshots, $(wc -l < "$_resolved_new") unique IPs"
+    else
+        vlog "$_tag$_label IP-only list, skipping history merge"
+    fi
    # Detect volatile domains (IPv4 and IPv6)
    if grep -v '^#' "$_f" | grep -q '[a-zA-Z]' ; then