Make (install from source) python without running tests

Question

I compiling python from source tar. All works good, but tests running 2 hours and two times. How to bypass these tests?

0:16:20 [178/405] test_inspect 0:16:26 [179/405] test_int 0:16:27 [180/405] test_int_literal 0:16:27 [181/405] test_io 0:18:18 [182/405] test_ioctl -- test_io passed in 1 min 51 sec 0:18:19 [183/405] test_ipaddress 0:18:22 [184/405] test_isinstance 0:18:23 [185/405] test_iter 0:18:24 [186/405] test_iterlen 0:18:25 [187/405] test_itertools 0:19:09 [188/405] test_json -- test_itertools passed in 44 sec 0:19:30 [189/405] test_keyword 

As result

make 7724,86s user 188,63s system 101% cpu 2:10:18,93 total 

I make its distribution like this

PYTHON_VERSION = 3.6.1 PYTHON_URL = https://www.python.org/ftp/python/${PYTHON_VERSION}/Python-${PYTHON_VERSION}.tar.xz  wget -O dl/Python-${PYTHON_VERSION}.tar.xz ${PYTHON_URL}  cd dl  tar xf Python-${PYTHON_VERSION}.tar.xz  mkdir -p dl/Python-${PYTHON_VERSION}-build/ cd Python-${PYTHON_VERSION}      ./configure --enable-optimizations --prefix=$$(pwd)-build --cache-file=$$(pwd)/cache-file 

This commands runs tests twice:

make -C dl/Python-${PYTHON_VERSION} -j8  make -C dl/Python-${PYTHON_VERSION} -j8 install 

p.s. This is part of another make file.

Answer 1

The configure option --enable-optimizations enables running test suites to generate data for profiling Python. The resulting python binary has better performance in executing python code. Improvements noted here

From configure help: --enable-optimizations  Enable expensive optimizations (PGO, etc). Disabled by default. 

From wikipedia

 profile-guided optimisation uses the results of profiling test runs of the instrumented program to optimize the final generated code. 

In short, you should not skip tests when using --enable-optimizations as the data required for profiling is generated by running tests. You can run make -j8 build_all followed by make -j8 install to skip tests once(the tests would still run with install target), but that would defeat the purpose. You can instead drop the configure flag for better build times.