perf: by default calling setNoDelay on the stream

[luin]

#405

[AVVS]

for TLS stream interface would look like stream.socket.setNoDelay(), I suppose we should add extra checks here

[AVVS]

@luin dont have write access, but probably would do the following to ensure tls support and make sure it doesn't crash here. Afaik there were some changes to TLS sockets, but this actually could make it implementation agnostic for the future, as in unix pipes might have different interface, etc:

P.S. don't have write access to push it to the branch, nor to merge when it all passes tests

      if (_this.options.noDelay) {
        if ('setNoDelay' in stream) {
          debug('disabling Naggle on raw tcp socket');
          stream.setNoDelay(true);
        }

        // NOTE: can also check based on _this.options.tls,
        // but this seems good enough
        if ('socket' in stream && 'setNoDelay' in stream.socket) {
          debug('disabling Naggle on tls socket');
          stream.socket.setNoDelay(true);
        }
      }

[luin]

I've sent a invite link to you so that you should be able to write to this repo. You can check out https://github.com/luin/ioredis/invitations if you don't see it.

It seems tls.TLSSocket is the subclass of net.Socket, so I think it should have the setNoDelay method (ref: nodejs/node-v0.x-archive#6194).

[AVVS]

@luin you seem to be right, at least for the latest versions, methods are proxied:
https://github.com/nodejs/node/blob/master/lib/_tls_wrap.js#L290-L305

In that case this should be good to go