perf(net/gclient): optimize default http.Transport connection pool configuration (#4390)

net/gclient/gclient.go

@@ -11,6 +11,7 @@ import (
 	"crypto/rand"
 	"crypto/tls"
 	"fmt"
+	"net"
 	"net/http"
 	"os"
 	"time"
@@ -66,7 +67,20 @@ func New() *Client {
 				TLSClientConfig: &tls.Config{
 					InsecureSkipVerify: true,
 				},
-				DisableKeepAlives: true,
+				DisableKeepAlives:     true,
+				MaxIdleConns:          100,
+				MaxIdleConnsPerHost:   50,
+				MaxConnsPerHost:       100,
+				IdleConnTimeout:       90 * time.Second,
+				ResponseHeaderTimeout: 30 * time.Second,
+				ExpectContinueTimeout: 1 * time.Second,
+				TLSHandshakeTimeout:   10 * time.Second,
+				ForceAttemptHTTP2:     true,
+				DisableCompression:    false,
+				DialContext: (&net.Dialer{
+					Timeout:   30 * time.Second,
+					KeepAlive: 30 * time.Second,
+				}).DialContext,
 			},
 		},
 		header:    make(map[string]string),