⏱️ Measure latency to a provided URL & show the min, max & average results

latench.sh

latency() {
	# Check if URL is provided
	if [[ -z "$1" ]]; then
		echo "Error: URL is required"
		echo "Usage: latency <url> [number_of_requests]"
		return 1
	fi
  
	local url="$1"
	local times=${2:-10}

	# Add http:// prefix if the URL doesn't start with http:// or https://
	if [[ ! "$url" =~ ^https?:// ]]; then
		url="https://$url"
	fi

	# Collect all measurements
	local results=()
	for i in $(seq 1 $times); do
		local result=$(curl -o /dev/null -s -w '%{time_total}' "$url" | awk '{printf "%.0f", $1 * 1000}')
		results+=($result)
		echo "Request $i: $result ms"
	done

	# Calculate statistics
	local sum=0
	local min=${results[0]}
	local max=${results[0]}

	# Make sure min is initialized properly
	if [[ -z "$min" ]]; then
		min=${results[1]}
	fi

	for val in "${results[@]}"; do
	# Skip empty values
	if [[ -n "$val" ]]; then
		sum=$((sum + val))
		if (( val < min )) || [[ -z "$min" ]]; then min=$val; fi
		if (( val > max )); then max=$val; fi
	fi
	done

	local avg=$((sum / times))

	echo "------------------------"
	echo "Min: $min ms"
	echo "Max: $max ms"
	echo "Avg: $avg ms"
}