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# Copyright 2023 The Go Authors. All rights reserved.
# Use of this source code is governed by a BSD-style
# license that can be found in the LICENSE file.
# This script collects a CPU profile of the compiler
# for building all targets in std and cmd, and puts
# the profile at cmd/compile/default.pgo.
dir=$(mktemp -d)
cd $dir
seed=$(date)
for p in $(go list std cmd); do
h=$(echo $seed $p | md5sum | cut -d ' ' -f 1)
echo $p $h
go build -o /dev/null -gcflags=-cpuprofile=$PWD/prof.$h $p
done
go tool pprof -proto prof.* > $(go env GOROOT)/src/cmd/compile/default.pgo
rm -r $dir
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