net/http: DefaultClient.Get is painfully slow #28188
Description
What version of Go are you using (go version)?
go version go1.11 linux/amd64
Does this issue reproduce with the latest release?
Yes.
What operating system and processor architecture are you using (go env)?
GOARCH="amd64"
GOBIN=""
GOCACHE="/home/opennota/.cache/go-build"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"
GOPATH="/home/opennota/gocode"
GOPROXY=""
GORACE=""
GOROOT="/home/opennota/go"
GOTMPDIR=""
GOTOOLDIR="/home/opennota/go/pkg/tool/linux_amd64"
GCCGO="gccgo"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD=""
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build055651916=/tmp/go-build -gno-record-gcc-switches"
What did you do?
package main
import (
"fmt"
"net/http"
"time"
)
func main() {
const url = "https://gufo.me/dict/epithets/%D0%B0%D0%B3%D1%80%D0%B5%D1%81%D1%81%D0%B8%D1%8F"
start := time.Now()
_, err := http.DefaultClient.Get(url)
if err != nil {
panic(err)
}
fmt.Println(time.Since(start))
}$ go build -o main main.go
$ ./main
10.813319159s
What did you expect to see?
The request is completed in 1 second at most.
What did you see instead?
The request takes almost 11 seconds: 10.813319159s
wget does the same request in under 1 second.