babel-esm-plugin | generate mirrored esm modules for your existing bundles | Plugin library

because of some issues such as having SSR, SSG, and CSR beside each other, I decided to create my own SSR for React js with express js, I'm using redux and saga, and I have several API calls to generate the data before rendering it. so I had to use several promises in my server-side renderer, such as waiting for redux to finish all APIs, or waiting for styles and scripts, also I'm using react-ssr-prepass and it navigates through all my components (for dispatching actions that are required in SSR). so I have a lot of thread-blocking stuff in my project.

for handling concurrency I started to use node-cluster, so I'll have several nodes on my server and it will increase the concurrency capacity, but it's not the best solution because, under heavy load, even node clustering won't be able to respond to all of the requests.

so I started to think about worker thread or child process in node js, so I make an instance of my server-side renderer on each request and do everything in the background, so concurrent requests won't wait for eachother to be done.

but the issue is in the child process or worker thread I can't use "import", since it's es6

so I have two questions

first of all, is there any way to use es6 in the child process? (I tried babel-esm-plugin but it's not supporting webpack 5)

second, is there any better idea than using worker thread of child process to increase the concurrency capacity?