Github user navsan commented on a diff in the pull request:
https://github.com/apache/incubator-quickstep/pull/22#discussion_r66854343
--- Diff: build/profile_build.sh ---
@@ -0,0 +1,111 @@
+#!/bin/bash
+# This script may be useful for developers to profile the build process
itself.
+#
+# This shell script runs CMake and make, dumping all output into a log
file.
+# It also logs the CPU usage and memory information during the build.
+# All log messages are timestamped to enable profiling.
+#
+# Dependencies:
+# - ts
+# sudo apt-get install -y libtime-duration-perl moreutils
+# - vmstat and mpstat
+# sudo apt-get install -y sysstat
+#
+# Usage: ./profile_build.sh
+# Set the CMake and make command you want to use below.
+# By default, the number of parallel make jobs is equal to the number of
+# (virtual) CPUs on the machine (nproc).
+# If CMakeLists.txt is detected, the script exits because in-source-tree
build
+# is not supported.
+# If CMakeCache.txt is detected, the script skips cmake and runs make only.
+
+# Copyright 2011-2015 Quickstep Technologies LLC.
+# Copyright 2015-2016 Pivotal Software, Inc.
+# Copyright 2016, Quickstep Research Group, Computer Sciences Department,
+# University of WisconsinâMadison.
+#
+# 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
+
+CMAKE_COMMAND="cmake \
+-D BUILD_SHARED_LIBS=On \
+-D USE_TCMALLOC=0 \
+-D CMAKE_BUILD_TYPE=Debug \
+.. "
+MAKE_COMMAND="make VERBOSE=1 -j `nproc`"
--- End diff --
Why remove the `-j` flag?
`nproc` is a coreutil. If it's not there, neither is `tee`. Are you sure
you want to add these things to the dependency list?
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