getRecentPerformanceSamples

curl --request POST \
  --url https://mainnet.helius-rpc.com/ \
  --header 'Content-Type: application/json' \
  --data '{
  "jsonrpc": "2.0",
  "id": "1",
  "method": "getRecentPerformanceSamples",
  "params": [
    4
  ]
}'

{
  "jsonrpc": "2.0",
  "id": "1",
  "result": [
    {
      "slot": 348125,
      "numTransactions": 126,
      "numNonVoteTransactions": 1,
      "samplePeriodSecs": 60,
      "numSlots": 126
    }
  ]
}