test-client.js

const {JSONRPCClient} = require("json-rpc-2.0");
const axios = require("axios");

// JSONRPCClient needs to know how to send a JSON-RPC request.
// Tell it by passing a function to its constructor. The function must take a JSON-RPC request and send it.
const client = new JSONRPCClient((jsonRPCRequest) =>
    axios({
        method: "post",
        url: "http://rpc-c-Reade-XI5DWSROAOTQ-1591340619.us-east-2.elb.amazonaws.com",
        //url: "http://localhost:3001/json-rpc",
        headers: {
            "content-type": "application/json",
        },
        data: jsonRPCRequest,
    }).then((response) => {
        if (response.status === 200) {
            // Use client.receive when you received a JSON-RPC response.
            return client.receive(response.data);
        } else if (jsonRPCRequest.id !== undefined) {
            return Promise.reject(new Error(response.statusText));
        }
    })
);

const filters = [
  {
    dataSize: 34,
  },
];
const params = {
  commitment: 'recent',
  encoding: 'base64',
  filters,
};

(async ()=> {
  const cacheStart = new Date();
  let res = null;
  for  (let i =0; i<100; i++) {
    res = await client.request("getProgramAccounts", ["WormT3McKhFJ2RkiGpdw9GKvNCrB2aB54gb2uV9MfQC", params])
  }
  const cacheEnd = new Date();
  console.log(
    // @ts-ignore
    `Cache's elapsed time: ${cacheEnd - cacheStart}, results: ${res.length}`
  );
})();