Add script to benchmark db_add speed

ci/bench.sh

@@ -0,0 +1,34 @@
+#!/bin/sh
+set -eu
+X=$(mktemp -d)
+cd "$X"
+
+mkdir -p "$X/.cache"
+cp -r "$HOME/.cache/sn0int" "$X/.cache/"
+
+#export CARGO_HOME="${CARGO_HOME:-$HOME/.cargo}"
+#export RUSTUP_HOME="${RUSTUP_HOME:-$HOME/.rustup}"
+export HOME="$X"
+
+cat > 1k.lua <<EOF
+-- Description: Insert 1k random subdomains
+-- Version: 0.1.0
+-- Source: domains
+-- License: GPL-3.0
+
+function run(arg)
+    for i=1,1000 do
+        x = 'foo' .. i .. '.example.com'
+
+        db_add('subdomain', {
+            domain_id=arg['id'],
+            value=x,
+        })
+    end
+end
+EOF
+
+echo '[*] Setting up workspace'
+echo 'add domain example.com' | "$@" > /dev/null
+echo '[*] Running 1k inserts'
+time "$@" run -f ./1k.lua