Bazel is Google's open source build system. This repo is a companion to my blog post and contains the configuration and scripts that I used for benchmarks.
The cacher _docker composeservice is a simple instance of nginx + WebDAV to serve as a remote cache. Thebuilder` does the actual C++ builds with Bazel and
clang 3.9.
You'll need docker and docker-compose installed. Then:
docker-compose build && docker-compose up
will build the images and start the cache server. Then, get a builder shell:
docker-compose run builder bash
git clone $BENCHMARK_GIT_REPO_URL $BENCHMARK_GIT_REPO_PATH
./benchmarks.py configure_bazel --cache
cd $BENCHMARK_GIT_REPO_PATH
cloc .
# Let's build some code now
git checkout $BENCHMARK_GIT_REV_OLD
# The cache is empty
rm -rf /src/cacher_root/*
bazel build //drake/examples:simple_continuous_time_system
# This took x seconds
# A no-op build is very fast:
bazel build //drake/examples:simple_continuous_time_system
# We filled up the cache:
du -sh /src/cacher_root
# Let's checkout a different revision
git checkout $BENCHMARK_GIT_REV_NEW
# There's quite a difference between the two
git diff $BENCHMARK_GIT_REV_OLD $BENCHMARK_GIT_REV_NEW | wc -l
# Build this new revision
bazel build //drake/examples:simple_continuous_time_system
# Let's check the cache again
du -sh /src/cacher_root
# Go back to the first
git checkout $BENCHMARK_GIT_REV_OLD
# Build again
bazel build //drake/examples:simple_continuous_time_system
# Let's spin up a new instance and make sure it can use the cache
exit
docker-compose run builder bash
git clone $BENCHMARK_GIT_REPO_URL $BENCHMARK_GIT_REPO_PATH
./benchmarks.py configure_bazel --cache
git checkout $BENCHMARK_GIT_REV_OLD
# The cache is still there:
du -sh /src/cacher_root
bazel build //drake/examples:simple_continuous_time_system