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Go version
go version go1.24.1 linux/amd64
Output of go env in your module/workspace:
AR='ar'
CC='gcc'
CGO_CFLAGS='-O2 -g'
CGO_CPPFLAGS=''
CGO_CXXFLAGS='-O2 -g'
CGO_ENABLED='1'
CGO_FFLAGS='-O2 -g'
CGO_LDFLAGS='-O2 -g'
CXX='g++'
GCCGO='gccgo'
GO111MODULE=''
GOAMD64='v3'
GOARCH='amd64'
GOAUTH='netrc'
GOBIN=''
GOCACHE='/tmp/go-build'
GOCACHEPROG=''
GODEBUG=''
GOENV='/home/hugo/.config/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFIPS140='off'
GOFLAGS=''
GOGCCFLAGS='-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/tmp/go-build1913709825=/tmp/go-build -gno-record-gcc-switches'
GOHOSTARCH='amd64'
GOHOSTOS='linux'
GOINSECURE=''
GOMOD='/home/hugo/k/go/src/go.mod'
GOMODCACHE='/home/hugo/go/pkg/mod'
GONOPROXY=''
GONOSUMDB=''
GOOS='linux'
GOPATH='/home/hugo/go'
GOPRIVATE=''
GOPROXY='https://proxy.golang.org,direct'
GOROOT='/home/hugo/k/go'
GOSUMDB='sum.golang.org'
GOTELEMETRY='local'
GOTELEMETRYDIR='/home/hugo/.config/go/telemetry'
GOTMPDIR=''
GOTOOLCHAIN='local'
GOTOOLDIR='/home/hugo/k/go/pkg/tool/linux_amd64'
GOVCS=''
GOVERSION='go1.24.1'
GOWORK=''
PKG_CONFIG='pkg-config'What did you do?
I've tried compiling the new typescript compiler and it took 70s:
________________________________________________________
Executed in 70.51 secs fish external
usr time 159.17 secs 543.00 micros 159.17 secs
sys time 5.49 secs 249.00 micros 5.49 secs
What tipped me off to an issue is the poor 160 ÷ 70 ≈ 2.3 multi-core utilization.
The biggest outlier is github.com/microsoft/typescript-go/internal/checker:
github.com/microsoft/typescript-go/internal/checker
________________________________________________________
Executed in 44.97 secs fish external
usr time 50.51 secs 413.00 micros 50.51 secs
sys time 0.32 secs 142.00 micros 0.32 secs
A CPU profile is very suspicious, almost all of the time is spent here:
I've added a couple of debug statements in theses loops:
There is a suspicious:
walkAll 36466 <nil> <nil>
36466 is the length of the queue.
This steadily slowly goes down, walkOne roughly does ~5000 iterations for each iteration of walkAll
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