lists.asmx = Web Service
listdata.svc = REST API
client.svc = CSOM
I see this trend on my local SP2010 VM, and the SP2010 servers my company has deployed.
API Size Timeline lists.asmx 46KB 131ms listdata.svc 12.5KB 889ms client.svc 40KB 326ms
What's going on? Why would these two new (to 2010) APIs be slower?