hack/benchstat-cmp.sh
#!/bin/bash

# Copyright 2023 The glassdb Authors
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.


set -e

# Compute defaults: last two benchmarks.
DEF=$(ls -ltr docs/profile/bench-* | awk '{ print $9 }' | tail -2)
OLD_DEF=$(echo "${DEF}" | sed -n '1p')
NEW_DEF=$(echo "${DEF}" | sed -n '2p')

# Otherwise take from args.
case "$#" in
    0)
        OLD="${OLD_DEF}"
        NEW="${NEW_DEF}"
        ;;
    1)
        OLD="${OLD_DEF}"
        NEW="${1}"
        ;;
    *)
        OLD="${1}"
        NEW="${2}"
        ;;
esac

echo "Comparing old=${OLD} new=${NEW}"
benchstat <(grep -v 'Stats:' "${OLD}" | grep '^Benchmark') \
    <(grep -v 'Stats:' "${NEW}" | grep '^Benchmark')
