ESP8266 Community Forum

What about syncing the clocks using a mesh or multicast heartbeat between all the units, and then have each unit generate their own 100Hz pulses?

The internal clocks would keep pretty good time if your heartbeat is every 5 mins or so, and you would then only need to send start/stop signals to kick off the pulses

The TCP implementation in lwip is very simple. I don't think it will add a significant amount of delay (other than implied by the WLAN protocol).

I don't think 100 pkt per second is attainable. But you could generate the 100hz and send a sync signal 1/10 of that. Basic PLL principle.
Or you want to trigger the leds with 1/100 precision ?
I have an application requiting 20 pkt/s.
A simple crono display with secs & 1/10 of sec and don't get smooth countdown.
Use custom firmware with arduino IDE.