Package reuseport provides TCP net.Listener with SO_REUSEPORT support.
SO_REUSEPORT allows linear scaling server performance on multi-CPU servers. See https://www.nginx.com/blog/socket-sharding-nginx-release-1-9-1/ for more details :)
The package is based on https://github.com/kavu/go_reuseport .
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Listen returns TCP listener with SO_REUSEPORT option set.
The returned listener tries enabling the following TCP options, which usually have positive impact on performance:
TCP_DEFER_ACCEPT. This option expects that the server reads from accepted connections before writing to them.
TCP_FASTOPEN. See https://lwn.net/Articles/508865/ for details.
Only tcp4 and tcp6 networks are supported.
ErrNoReusePort error is returned if the system doesn't support SO_REUSEPORT.
package main
import (
"fmt"
"log"
"github.com/valyala/fasthttp"
"github.com/valyala/fasthttp/reuseport"
)
func main() {
ln, err := reuseport.Listen("tcp4", "localhost:12345")
if err != nil {
log.Fatalf("error in reuseport listener: %v", err)
}
if err = fasthttp.Serve(ln, requestHandler); err != nil {
log.Fatalf("error in fasthttp Server: %v", err)
}
}
func requestHandler(ctx *fasthttp.RequestCtx) {
fmt.Fprintf(ctx, "Hello, world!")
}
type ErrNoReusePort struct {
}
ErrNoReusePort is returned if the OS doesn't support SO_REUSEPORT.
Error implements error interface.
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