x/tools/gopls: massive cpu and memory usage #46897
Description
What version of Go are you using (go version)?
go version go1.15.7 darwin/amd64
Does this issue reproduce with the latest release?
Yes - With go1.16.4 as well
What operating system and processor architecture are you using (go env)?
go env Output
$ go env GO111MODULE="off" GOARCH="amd64" GOBIN="" GOCACHE="/Users/zach.schulze/Library/Caches/go-build" GOENV="/Users/zach.schulze/Library/Application Support/go/env" GOEXE="" GOFLAGS="" GOHOSTARCH="amd64" GOHOSTOS="darwin" GOINSECURE="" GOMODCACHE="/Users/zach.schulze/go-code/pkg/mod" GONOPROXY="" GONOSUMDB="" GOOS="darwin" GOPATH="/Users/zach.schulze/go-code" GOPRIVATE="" GOPROXY="https://proxy.golang.org,direct" GOROOT="/private/var/tmp/_bazel_zach.schulze/507f29846d43dcd14bc7e23ed37206d8/external/go_sdk" GOSUMDB="sum.golang.org" GOTMPDIR="" GOTOOLDIR="/private/var/tmp/_bazel_zach.schulze/507f29846d43dcd14bc7e23ed37206d8/external/go_sdk/pkg/tool/darwin_amd64" GCCGO="gccgo" AR="ar" CC="clang" CXX="clang++" 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 -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/jc/10b96gcj0gl80vll0lym3njr0000gn/T/go-build512011677=/tmp/go-build -gno-record-gcc-switches -fno-common"
What did you do?
Start gopls in a mono-repo and begin working
What did you expect to see?
gopls should function properly within a mono-repo. Memory and CPU usage should plateau and no longer climb and slow down the entire machine
What did you see instead?
go and gopls climb in memory and CPU usage till the point I must completely close and restart all go/gopls instances. This is within a single mono repo that is using vs 1.15.7 but is reproducible on the latest gopls and go version.