Add performance test using lima and iperf3

test/lima.yaml

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+images:
+- location: "https://cloud-images.ubuntu.com/releases/24.04/release/ubuntu-24.04-server-cloudimg-amd64.img"
+  arch: "x86_64"
+- location: "https://cloud-images.ubuntu.com/releases/24.04/release/ubuntu-24.04-server-cloudimg-arm64.img"
+  arch: "aarch64"
+cpus: 2
+memory: "2g"
+plain: true
+networks:
+- socket: /var/run/socket_vmnet
+provision:
+- mode: system
+  script: |
+    #!/bin/bash
+    set -eux -o pipefail
+    command -v ipref3 >/dev/null 2>&1 && exit 0
+    export DEBIAN_FRONTEND=noninteractive
+    apt-get update
+    apt-get install -y iperf3
+probes:
+- description: "iperf installed"
+  script: |
+    #!/bin/bash
+    set -eux -o pipefail
+    if ! timeout 30s bash -c "until command -v iperf3 >/dev/null 2>&1; do sleep 3; done"; then
+      echo >&2 "iperf3 is not installed yet"
+      exit 1
+    fi
+  hint: |
+    See "/var/log/cloud-init-output.log" in the guest

test/perf.sh

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+#!/bin/bash
+set -e
+cd "$(dirname "$0")"
+
+TIME=${2:-30}
+
+server_address() {
+    limactl shell server ip -j -4 addr show dev lima0 | jq -r '.[0].addr_info[0].local'
+}
+
+create() {
+    limactl create --name server --tty=false lima.yaml &
+    limactl create --name client --tty=false lima.yaml &
+    wait
+}
+
+host-to-vm() {
+    limactl start server
+    nohup limactl shell server iperf3 --server --daemon
+    iperf3-darwin --client $(server_address) --length 1m --time $TIME
+    limactl stop server
+}
+
+host-to-vm-2() {
+    limactl start server &
+    limactl start client &
+    wait
+    nohup limactl shell server iperf3 --server --daemon
+    iperf3-darwin --client $(server_address) --length 1m --time $TIME
+    limactl stop server
+    limactl stop client
+}
+
+vm-to-vm() {
+    limactl start server &
+    limactl start client &
+    wait
+    nohup limactl shell server iperf3 --server --daemon
+    addr=$(server_address)
+    limactl shell client iperf3 --client $addr --length 1m --time $TIME
+    limactl stop server
+    limactl stop client
+}
+
+delete() {
+    limactl delete -f server
+    limactl delete -f client
+}
+
+case $1 in
+create)
+    create
+    ;;
+host-to-vm)
+    host-to-vm
+    ;;
+host-to-vm-2)
+    host-to-vm-2
+    ;;
+vm-to-vm)
+    vm-to-vm
+    ;;
+delete)
+    delete
+    ;;
+*)
+    echo "Usage $0 command"
+    echo
+    echo "Available commands:"
+    echo "  create                  create test vms"
+    echo "  delete                  delete test vms"
+    echo "  host-to-vm [TIME]       test host to vm performance"
+    echo "  host-to-vm-2 [TIME]     test host to vm performance with 1 extra vm"
+    echo "  vm-to-vm [TIME]         test vm to vm performance"
+    ;;
+esac