request help: Why apisix-go-plguin have performed very poorly

[tacklong]

Issue description

use lua-fault-injection return message，its performance is normal，but, use go-plguin-say return message, which have performed very poorly

Environment

• APISIX Go Plugin Runner's version: 0.2.0
• APISIX version: 2.13
• Go version: go 1.17
• OS (cmd: uname -a): apisix deployed in CentOS 7.9 64， ali ecs 2C8G wrk deployed in CentOS 7.9 64，ali ecs 8C16G

path:/hello，lua-fault-injection path:/get，go-plguin-say

[spacewander]

The data don't surprise me.

The performance of Lua version is very high because its path is shorter: client -> APISIX -> client

The path of the Go version is: client -> APISIX -> Runner -> APISIX -> client.

For a regular path (client -> APISIX -> [Runner -> APISIX ->] upstream -> APISIX -> client), requests go through the runner will be 50% slower because of the RPC overhead.

The RPC overhead is high when it is measured with a simple Hello world case.