首先你要正确地安装了插件。
环境
Windows 10, GO 1.15
GOROOT=c:\go
GOPATH=E:\OneDrive\code\go
问题描述
如果我们设置GO111MODULE环境变量，其值为on时自动补全很慢，其值为off时补全正常。
image.png
（说明：必须要按照在图片里那样设置环境变量，不要运行命令行set; 每次改变变量需要重启VSCode）
gomod肯定不能关了，怎么解决呢？
解决方法
go的自动补全靠的时gocode,我们可以gocode -debug查看偏移，自动补全正常时偏移小于1ms,设置为on时偏移有3秒
很自然地我们去GitHub看看项目
gocode
人家直接写着：
You should have a correctly installed Go compiler environment and
your personal workspace ($GOPATH). If you have no idea
what $GOPATH is, take a look here
(http://golang.org/doc/code.html). Please make sure that
your $GOPATH/bin is available in your $PATH. This is
important, because most editors assume that gocode binary is
available in one of the directories, specified by
your $PATH environment variable. Otherwise manually copy
the gocode binary from $GOPATH/bin to a location which is
part of your $PATH after getting it in step 2.
我就试了下, 但是我的操作有失误但歪打正着：
我把
copy the gocode binary from $GOPATH/bin to a location which is
part of your $PATH
看成
copy the gocode binary from $GOPATH/bin to a location which is
part of your $GOPATH
就是把$GOPATH/bin中的gocode.exe复制到了$GOPATH中
image.png
image.png
这不就大功告成了嘛????????????????
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