RoadRunner
RoadRunner is an open-source (MIT licensed) high-performance PHP application server, load balancer, and process manager. It supports running as a service with the ability to extend its functionality on a per-project basis.
RoadRunner includes PSR-7/PSR-17 compatible HTTP and HTTP/2 server and can be used to replace classic Nginx+FPM（注：PHP-FPM） setup with much greater performance and flexibility.
GitHub - spiral/roadrunner: High-performance PHP application server, load-balancer and process manager written in Golang
SpiralScoutという会社がメンテしている
PHPでgRPCがつかえるようになる
ref. PHPでgRPCってどこまでいけるの？
streaming RPCは利用できないっぽい
【RFC】 Streaming request & responses · Issue #2 · spiral/roadrunner · GitHub
2021年5月29日 RoadRunnerの世界 〜 Yet Another Alt PHP-FPM
https://gyazo.com/939b57aa7ed923ebe3ce6be27e87f67c
https://youtu.be/KXq8-CIMu_c?t=694
PHPからgRPCを使う方法