cache-2.js

let cache = {}; // just a simple js object
// cache is just some space in RAM (memory)
function getStudentDetailsFromDatabase(name) { // AWS - US east
    return {
        name: `${name} is a student`,
        age: Math.floor(Math.random() * 100)
    } // response time is n seconds
}
function main(name) {
    if(cache[name]) {
        console.log("pulling from cache :", name);
        return cache[name];
    }else {
        cache[name] = getStudentDetailsFromDatabase(name);
        return cache[name];
    }
}
main("suhail")
main("adity")
main("aditya")
main("swain")
main("adity")