# Copyright 2023 The Go Authors. All rights reserved.

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# Use of this source code is governed by a BSD-style

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# license that can be found in the LICENSE file.

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# This script collects a CPU profile of the compiler

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# for building all targets in std and cmd, and puts

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# the profile at cmd/compile/default.pgo.

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dir=$(mktemp -d)

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cd $dir

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seed=$(date)

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for p in $(go list std cmd); do

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h=$(echo $seed $p | md5sum | cut -d ' ' -f 1)

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echo $p $h

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go build -o /dev/null -gcflags=-cpuprofile=$PWD/prof.$h $p

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done

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go tool pprof -proto prof.* > $(go env GOROOT)/src/cmd/compile/default.pgo

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rm -r $dir

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