diff --git a/coolq/api.go b/coolq/api.go
index 486b543..44a52e8 100644
--- a/coolq/api.go
+++ b/coolq/api.go
@@ -1342,7 +1342,7 @@ func (bot *CQBot) CQHandleQuickOperation(context, operation gjson.Result) global
 
 		if reply.Exists() {
 			autoEscape := param.EnsureBool(operation.Get("auto_escape"), false)
-			at := operation.Get("at_sender").Bool() && !isAnonymous && msgType == "group"
+			at := !isAnonymous && operation.Get("at_sender").Bool() && msgType == "group"
 			if at && reply.IsArray() {
 				// 在 reply 数组头部插入CQ码
 				replySegments := make([]global.MSG, 0)
@@ -1388,7 +1388,7 @@ func (bot *CQBot) CQHandleQuickOperation(context, operation gjson.Result) global
 			if operation.Get("delete").Bool() {
 				bot.CQDeleteMessage(int32(context.Get("message_id").Int()))
 			}
-			if operation.Get("kick").Bool() && !isAnonymous {
+			if !isAnonymous && operation.Get("kick").Bool() {
 				bot.CQSetGroupKick(context.Get("group_id").Int(), context.Get("user_id").Int(), "", operation.Get("reject_add_request").Bool())
 			}
 			if operation.Get("ban").Bool() {
diff --git a/coolq/cqcode.go b/coolq/cqcode.go
index 1e97f4b..6b9edac 100644
--- a/coolq/cqcode.go
+++ b/coolq/cqcode.go
@@ -209,7 +209,7 @@ func ToArrayMessage(e []message.IMessageElement, source message.Source) (r []glo
 		case *message.DiceElement:
 			m = global.MSG{
 				"type": "dice",
-				"data": map[string]string{"value": fmt.Sprint(o.Value)},
+				"data": map[string]string{"value": strconv.FormatInt(int64(o.Value), 10)},
 			}
 		case *message.MarketFaceElement:
 			m = global.MSG{
@@ -1192,7 +1192,7 @@ func (bot *CQBot) makeImageOrVideoElem(d map[string]string, video bool, sourceTy
 		}
 		return &LocalImageElement{File: fu.Path, URL: f}, nil
 	}
-	if strings.HasPrefix(f, "base64") && !video {
+	if !video && strings.HasPrefix(f, "base64") {
 		b, err := param.Base64DecodeString(strings.TrimPrefix(f, "base64://"))
 		if err != nil {
 			return nil, err
diff --git a/db/leveldb/writer.go b/db/leveldb/writer.go
index a8fe707..baed92a 100644
--- a/db/leveldb/writer.go
+++ b/db/leveldb/writer.go
@@ -2,7 +2,6 @@ package leveldb
 
 import (
 	"bytes"
-	"io"
 
 	"github.com/Mrs4s/go-cqhttp/global"
 )
@@ -125,7 +124,7 @@ func (w *writer) bytes() []byte {
 	out.uvarint(dataVersion)
 	out.uvarint(uint64(w.strings.Len()))
 	out.uvarint(uint64(w.data.Len()))
-	_, _ = io.Copy(&out, &w.strings)
-	_, _ = io.Copy(&out, &w.data)
+	_, _ = w.strings.WriteTo(&out)
+	_, _ = w.data.WriteTo(&out)
 	return out.Bytes()
 }
diff --git a/global/log_hook.go b/global/log_hook.go
index b93f130..44f4f1d 100644
--- a/global/log_hook.go
+++ b/global/log_hook.go
@@ -195,7 +195,8 @@ func (f LogFormat) Format(entry *logrus.Entry) ([]byte, error) {
 		buf.WriteString(colorReset)
 	}
 
-	ret := append([]byte(nil), buf.Bytes()...) // copy buffer
+	ret := make([]byte, len(buf.Bytes()))
+	copy(ret, buf.Bytes()) // copy buffer
 	return ret, nil
 }
 
diff --git a/global/net.go b/global/net.go
index ce74edb..c72000a 100644
--- a/global/net.go
+++ b/global/net.go
@@ -79,7 +79,7 @@ func DownloadFile(url, path string, limit int64, headers map[string]string) erro
 	if limit > 0 && resp.ContentLength > limit {
 		return ErrOverSize
 	}
-	_, err = io.Copy(file, resp.Body)
+	_, err = file.ReadFrom(resp.Body)
 	if err != nil {
 		return err
 	}
@@ -107,7 +107,7 @@ func DownloadFileMultiThreading(url, path string, limit int64, threadCount int,
 				return err
 			}
 			defer file.Close()
-			if _, err = io.Copy(file, s); err != nil {
+			if _, err = file.ReadFrom(s); err != nil {
 				return err
 			}
 			return errUnsupportedMultiThreading
diff --git a/internal/selfupdate/update.go b/internal/selfupdate/update.go
index 5aa52a3..8771502 100644
--- a/internal/selfupdate/update.go
+++ b/internal/selfupdate/update.go
@@ -188,7 +188,7 @@ func fromStream(updateWith io.Reader) (err error, errRecover error) {
 	}
 	// We won't log this error, because it's always going to happen.
 	defer func() { _ = fp.Close() }()
-	if _, err = io.Copy(fp, bufio.NewReader(updateWith)); err != nil {
+	if _, err = bufio.NewReader(updateWith).WriteTo(fp); err != nil {
 		logrus.Errorf("Unable to copy data: %v\n", err)
 	}
 
diff --git a/server/daemon.go b/server/daemon.go
index f2746d0..0a570b6 100644
--- a/server/daemon.go
+++ b/server/daemon.go
@@ -3,9 +3,9 @@ package server
 // daemon 功能写在这，目前仅支持了-d 作为后台运行参数，stop，start，restart这些功能目前看起来并不需要，可以通过api控制，后续需要的话再补全。
 
 import (
-	"fmt"
 	"os"
 	"os/exec"
+	"strconv"
 	"strings"
 
 	"github.com/Mrs4s/go-cqhttp/global"
@@ -36,7 +36,7 @@ func Daemon() {
 
 	log.Info("[PID] ", proc.Process.Pid)
 	// pid写入到pid文件中，方便后续stop的时候kill
-	pidErr := savePid("go-cqhttp.pid", fmt.Sprintf("%d", proc.Process.Pid))
+	pidErr := savePid("go-cqhttp.pid", strconv.FormatInt(int64(proc.Process.Pid), 10))
 	if pidErr != nil {
 		log.Errorf("save pid file error: %v", pidErr)
 	}
diff --git a/server/scf.go b/server/scf.go
index f41b359..7d95e7f 100644
--- a/server/scf.go
+++ b/server/scf.go
@@ -54,7 +54,7 @@ func (l *lambdaResponseWriter) flush() error {
 	buffer := global.NewBuffer()
 	defer global.PutBuffer(buffer)
 	body := utils.B2S(l.buf.Bytes())
-	header := make(map[string]string)
+	header := make(map[string]string, len(l.header))
 	for k, v := range l.header {
 		header[k] = v[0]
 	}