chore: add A/B benchmark script, remove worker thread experiments

benchmark-ab.sh

@@ -0,0 +1,131 @@
+#!/bin/bash
+# A/B benchmark: old (pre-perf) vs new (current)
+# Usage: ./benchmark-ab.sh
+set -e
+
+PORT_OLD=13003
+PORT_NEW=13004
+RUNS=3
+DB_PATH="$(pwd)/data/meshcore.db"
+
+OLD_COMMIT="23caae4"
+NEW_COMMIT="$(git rev-parse HEAD)"
+
+echo "═══════════════════════════════════════════════════════"
+echo "  A/B Benchmark: Pre-optimization vs Current"
+echo "═══════════════════════════════════════════════════════"
+echo "OLD: $OLD_COMMIT (v2.0.1 — before any perf work)"
+echo "NEW: $NEW_COMMIT (current)"
+echo "Runs per endpoint: $RUNS"
+echo ""
+
+# Get a real node pubkey for testing
+ORIG_DIR="$(pwd)"
+PUBKEY=$(sqlite3 "$DB_PATH" "SELECT public_key FROM nodes ORDER BY last_seen DESC LIMIT 1")
+echo "Test node: ${PUBKEY:0:16}..."
+echo ""
+
+# Setup old version in temp dir
+OLD_DIR=$(mktemp -d)
+echo "Cloning old version to $OLD_DIR..."
+git worktree add "$OLD_DIR" "$OLD_COMMIT" --quiet 2>/dev/null || {
+  git worktree add "$OLD_DIR" "$OLD_COMMIT" --detach --quiet
+}
+# Copy config + db symlink
+# Copy config + db + share node_modules
+cp config.json "$OLD_DIR/"
+mkdir -p "$OLD_DIR/data"
+cp "$ORIG_DIR/data/meshcore.db" "$OLD_DIR/data/meshcore.db"
+ln -sf "$ORIG_DIR/node_modules" "$OLD_DIR/node_modules"
+
+ENDPOINTS=(
+  "Stats|/api/stats"
+  "Packets(50)|/api/packets?limit=50"
+  "PacketsGrouped|/api/packets?limit=50&groupByHash=true"
+  "NodesList|/api/nodes?limit=50"
+  "NodeDetail|/api/nodes/$PUBKEY"
+  "NodeHealth|/api/nodes/$PUBKEY/health"
+  "NodeAnalytics|/api/nodes/$PUBKEY/analytics?days=7"
+  "BulkHealth|/api/nodes/bulk-health?limit=50"
+  "NetworkStatus|/api/nodes/network-status"
+  "Channels|/api/channels"
+  "Observers|/api/observers"
+  "RF|/api/analytics/rf"
+  "Topology|/api/analytics/topology"
+  "ChannelAnalytics|/api/analytics/channels"
+  "HashSizes|/api/analytics/hash-sizes"
+)
+
+bench_endpoint() {
+  local port=$1 path=$2 runs=$3 nocache=$4
+  local total=0
+  for i in $(seq 1 $runs); do
+    local url="http://127.0.0.1:$port$path"
+    if [ "$nocache" = "1" ]; then
+      if echo "$path" | grep -q '?'; then
+        url="${url}&nocache=1"
+      else
+        url="${url}?nocache=1"
+      fi
+    fi
+    local ms=$(curl -s -o /dev/null -w "%{time_total}" "$url" 2>/dev/null)
+    local ms_int=$(echo "$ms * 1000" | bc | cut -d. -f1)
+    total=$((total + ms_int))
+  done
+  echo $((total / runs))
+}
+
+# Launch old server
+echo "Starting OLD server (port $PORT_OLD)..."
+cd "$OLD_DIR"
+PORT=$PORT_OLD node server.js &>/dev/null &
+OLD_PID=$!
+cd - >/dev/null
+
+# Launch new server
+echo "Starting NEW server (port $PORT_NEW)..."
+PORT=$PORT_NEW node server.js &>/dev/null &
+NEW_PID=$!
+
+# Wait for both
+sleep 12  # old server has no memory store; new needs prewarm
+
+# Verify
+curl -s "http://127.0.0.1:$PORT_OLD/api/stats" >/dev/null 2>&1 || { echo "OLD server failed to start"; kill $OLD_PID $NEW_PID 2>/dev/null; exit 1; }
+curl -s "http://127.0.0.1:$PORT_NEW/api/stats" >/dev/null 2>&1 || { echo "NEW server failed to start"; kill $OLD_PID $NEW_PID 2>/dev/null; exit 1; }
+
+echo ""
+echo "Warming up caches on new server..."
+for ep in "${ENDPOINTS[@]}"; do
+  path="${ep#*|}"
+  curl -s -o /dev/null "http://127.0.0.1:$PORT_NEW$path" 2>/dev/null
+done
+sleep 2
+
+printf "\n%-22s %9s %9s %9s %9s\n" "Endpoint" "Old(ms)" "New-cold" "New-cache" "Speedup"
+printf "%-22s %9s %9s %9s %9s\n" "──────────────────────" "─────────" "─────────" "─────────" "─────────"
+
+for ep in "${ENDPOINTS[@]}"; do
+  name="${ep%%|*}"
+  path="${ep#*|}"
+  
+  old_ms=$(bench_endpoint $PORT_OLD "$path" $RUNS 0)
+  new_cold=$(bench_endpoint $PORT_NEW "$path" $RUNS 1)
+  new_cached=$(bench_endpoint $PORT_NEW "$path" $RUNS 0)
+  
+  if [ "$old_ms" -gt 0 ] && [ "$new_cached" -gt 0 ]; then
+    speedup="${old_ms}/${new_cached}"
+    speedup_x=$(echo "scale=0; $old_ms / $new_cached" | bc 2>/dev/null || echo "?")
+    printf "%-22s %7dms %7dms %7dms %7d×\n" "$name" "$old_ms" "$new_cold" "$new_cached" "$speedup_x"
+  else
+    printf "%-22s %7dms %7dms %7dms %9s\n" "$name" "$old_ms" "$new_cold" "$new_cached" "∞"
+  fi
+done
+
+echo ""
+echo "═══════════════════════════════════════════════════════"
+
+# Cleanup
+kill $OLD_PID $NEW_PID 2>/dev/null
+git worktree remove "$OLD_DIR" --force 2>/dev/null
+echo "Done."