benchlink.sh

#!/bin/sh

buildlog=$(go build -o /tmp/blah -x -work $2 2>&1)
eval $(echo "$buildlog" | grep WORK=)
linkcmd=$(echo "$buildlog" | grep -F "$(go tool -n link)")
for i in `seq $1`; do
    eval /usr/bin/time -f '"BenchmarkLink$3 1 %e secs %M MaxRSS"' $linkcmd
done

benchlinkbranch.sh

#!/bin/sh

set -e

echo "Building go $1"

(cd /opt/opensource/go/src; git checkout $1; ./make.bash > /dev/null 2>&1)

echo "installing juju with $1"

go install github.com/juju/juju/cmd/juju

echo "Benchmarking go old"

~/bin/benchlink.sh 100 cmd/go CmdGo 2>&1 > old.txt 2>&1

echo "Benchmarking juju old"

~/bin/benchlink.sh 100 github.com/juju/juju/cmd/juju Juju >> old.txt 2>&1


echo "Building go $2"

(cd /opt/opensource/go/src; git checkout $2; ./make.bash > /dev/null 2>&1)

echo "installing juju with $2"

go install github.com/juju/juju/cmd/juju

echo "Benchmarking go new"

~/bin/benchlink.sh 100 cmd/go CmdGo 2>&1 > new.txt 2>&1

echo "Benchmarking juju new"

~/bin/benchlink.sh 100 github.com/juju/juju/cmd/juju Juju >> new.txt 2>&1

benchstat old.txt new.txt