Investigate 40 gbps thunderbolt 5 networking between Macbook Pro M4 Max and Mac Mini M4 Pro

[obriensystems]

Some initial testing with a thunderbolt 4 cable showed up to 7gbps traffic
Testing with a thunderbolt 5 1 meter cable shows 39gbps (limited likely by the 512g nvme on the mac mini or the 1tb nvme (not a 2/4/8) on the macbook pro

Using iftop

brew install iftop

sudo iftop -i bridge0

transfer 26GB two vmware fusion vms

macmini receiving side

TX:             cum:   7.63MB   peak:   7.48Mb                                                                                                              rates:   3.64Mb  6.02Mb  1.52Mb
RX:                    9.99GB           5.15Gb                                                                                                                       5.15Gb  7.99Gb  2.00Gb 
TOTAL:                 10.00GB          5.15Gb                                                                                                                       5.15Gb  8.00Gb  2.00Gb

macbook side
bridge0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	options=63<RXCSUM,TXCSUM,TSO4,TSO6>
	ether 36:43:37:a5:28:00
	inet6 fe80::4cc:d67c:b331:602c%bridge0 prefixlen 64 secured scopeid 0x10 
	inet 169.254.17.101 netmask 0xffff0000 broadcast 169.254.255.255
	Configuration:
		id 0:0:0:0:0:0 priority 0 hellotime 0 fwddelay 0
		maxage 0 holdcnt 0 proto stp maxaddr 100 timeout 1200
		root id 0:0:0:0:0:0 priority 0 ifcost 0 port 0
		ipfilter disabled flags 0x0
	member: en1 flags=3<LEARNING,DISCOVER>
	        ifmaxaddr 0 port 10 priority 0 path cost 0
	member: en2 flags=3<LEARNING,DISCOVER>
	        ifmaxaddr 0 port 11 priority 0 path cost 0
	member: en3 flags=3<LEARNING,DISCOVER>
	        ifmaxaddr 0 port 12 priority 0 path cost 0
	nd6 options=201<PERFORMNUD,DAD>
	media: autoselect
	status: active