benchcmp-against-master.sh

#!/bin/bash
set -e

# add *.bench to .gitignore

trap 'kill -HUP 0' EXIT;

currentBranch=$(git rev-parse --abbrev-ref HEAD)

echo "bench current state"

go test -run=NONE -bench=. ./... > new.bench

git diff-index --quiet HEAD -- &&
{
  echo "checkout master"
  git checkout master
};

git diff-index --quiet HEAD -- ||
{
  echo "stash and checkout master"
  git stash
  stashed=true
  git checkout master
};

echo "bench master"
go test -run=NONE -bench=. ./... > old.bench

echo "go back to current state"
git checkout $currentBranch

if [ "$stashed" = true ]; then
  echo "pop stash"
  git stash pop
fi

benchcmp old.bench new.bench