net/http: http.Request.parseForm gc too slow cause OOM?

[djoylove]

Please answer these questions before submitting your issue. Thanks!
when i use http.Request.parseForm() , i found the memory is grow too high and will not reduce after the request is over, finally it cause Out Of Memory issue? how should i do to get rid of this?
i try to remove the parseForm() line ,and the program work just fine.

What version of Go are you using (go version)?

golang 1.9.1

Does this issue reproduce with the latest release?

yes

What operating system and processor architecture are you using (go env)?

GOARCH="amd64"
GOBIN="/usr/local/Cellar/go/1.9.1/libexec/bin"
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"
GOPATH="/Users/xiaod/workspace/php_work/wuxian/go_project"
GORACE=""
GOROOT="/usr/local/Cellar/go/1.9.1/libexec"
GOTOOLDIR="/usr/local/Cellar/go/1.9.1/libexec/pkg/tool/darwin_amd64"
GCCGO="gccgo"
CC="clang"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/n1/8k51kgd13fd8_k7d1yknfkhr0000gn/T/go-build910704619=/tmp/go-build -gno-record-gcc-switches -fno-common"
CXX="clang++"
CGO_ENABLED="1"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"

What did you do?

If possible, provide a recipe for reproducing the error.
A complete runnable program is good.
A link on play.golang.org is best.

What did you expect to see?

What did you see instead?

[mvdan]

This is a question, so please use https://github.com/golang/go/wiki/Questions.

I'm going to close this, as you did not use the issue template and this is lacking any information to see if there is a bug at all in Go.