Would it be possible to send pre-compressed data? i.e. if one caches messages one could cache the compressed version in order to avoid compressing during every send?

e.g.

Instead of:

cache.set(key, buf)
// ...
for (const socket of sockets) (  
  socket.send(cache.get(key)) // compressed by uws
}

cache.set(key, zlib.deflateSync(buf))
// ...
for (const socket of sockets) (
  socket.send(cache.get(key))
}

This would enable 2 things:

• Re-use compression
• Move compression to other thread