Measure time elapsed in fulcrum or another electrum server

eval-performance-electrum.sh

#! /usr/bin/env bash

host="localhost"
port=50001

get_balance='{"jsonrpc":"2.0","method":"blockchain.scripthash.get_balance","params":["562ce1c828ab2594470ab4de2561d993d5b5cce0b55695658afb17bec0121ea5"],"id":1}'
get_history='{"jsonrpc":"2.0","method":"blockchain.scripthash.get_history","params":["562ce1c828ab2594470ab4de2561d993d5b5cce0b55695658afb17bec0121ea5"],"id":1}'

# command="$get_balance"
command="$get_history"

echo "Sending request..."
t0=$(date +%s%3N)
master=$(mktemp -u /tmp/socat.XXXX)
socat PTY,raw,echo=0,link="$master" TCP:"$host":"$port" 2>/tmp/socat.err &
socat_pid=$!
sleep 0.05

printf '%s\n' "$command" >"$master"
# read a single line (newline-terminated JSON)
IFS= read -r output <"$master"

kill $socat_pid 2>/dev/null || true
rm -f "$master"
t1=$(date +%s%3N)

echo "${output:0:100}"
echo "time: $((t1-t0)) ms"