Take a whack at using ccache to speed up builds on CI.

.travis.yml

@@ -8,6 +8,11 @@ python:
 env:
     global:
         - BUILD_RUNTIMES=$HOME/.runtimes
+        - CC="ccache gcc"
+        - CCACHE_NOCPP2=true
+        - CCACHE_SLOPPINESS=file_macro,time_macros,include_file_ctime,include_file_mtime
+        - CCACHE_NOHASHDIR=true
+        - CFLAGS="-Ofast -pipe -fomit-frame-pointer -march=native -flto"
 
     matrix:
       # These are ordered to get as much diversity in the
@@ -37,6 +42,7 @@ cache:
     - $HOME/.venv
     - $HOME/.runtimes
     - $HOME/.wheelhouse
+    - $HOME/.ccache
 
 before_cache:
     - rm -f $HOME/.cache/pip/log/debug.log

Makefile

@@ -168,11 +168,13 @@ develop:
 # First install a newer pip so that it can use the wheel cache
 # (only needed until travis upgrades pip to 7.x; note that the 3.5
 # environment uses pip 7.1 by default)
-	python -m pip install -U pip setuptools
+	${PYTHON} -m pip install -U pip setuptools
 # Then start installing our deps so they can be cached. Note that use of --build-options / --global-options / --install-options
 # disables the cache.
 # We need wheel>=0.26 on Python 3.5. See previous revisions.
-	GEVENTSETUP_EV_VERIFY=3 ${PYTHON} -m pip install -U -r dev-requirements.txt
+	${PYTHON} -m pip install -U -r ci-requirements.txt
+	GEVENTSETUP_EV_VERIFY=3 time ${PYTHON} -m pip install -U -e .
+	ccache -s
 	@${PYTHON} scripts/travis.py fold_end install
 
 test-py27: $(PY27)

_setuputils.py

@@ -137,8 +137,13 @@ def make_universal_header(filename, *defines):
 
 def _system(cmd, cwd=None, env=None, **kwargs):
     sys.stdout.write('Running %r in %s\n' % (cmd, cwd or os.getcwd()))
+    sys.stdout.flush()
     if 'shell' not in kwargs:
         kwargs['shell'] = True
+    env = env or os.environ.copy()
+    if env.get('CC', '').startswith('ccache '):
+        # Running configure scripts under ccache just adds overhead.
+        env['CC'] = env['CC'][7:]
     return check_call(cmd, cwd=cwd, env=env, **kwargs)
 
 

appveyor.yml

@@ -142,6 +142,7 @@ install:
 
 cache:
   - "%TMP%\\py\\"
+  - '%LOCALAPPDATA%\pip\Cache'
 
 build_script:
   # Build the compiled extension

ci-requirements.txt

+setuptools
+wheel
+cython>=0.27.3 ; python_version < '3.7'
+# Thread state changes, especially in Pythran seem to need this,
+# which in turn requires CPython 3.7.0a3 or above
+git+https://github.com/cython/cython#egg=cython ; python_version >= '3.7'
+greenlet>=0.4.10 ; python_version < '3.7'
+# Thread state changes again; requires 0.4.13, as yet unreleased
+git+https://github.com/python-greenlet/greenlet#egg=greenlet ; python_version >= '3.7'
+pylint>=1.8.0
+# pyyaml is included here and doesn't install on travis with 3.7a3
+prospector[with_pyroma] ; python_version < '3.7'
+coverage>=4.0
+coveralls>=1.0
+# See version requirements in setup.py
+cffi
+futures
+dnspython
+idna
+# Makes tests faster
+psutil
+# For viewing README.rst (restview --long-description),
+# CONTRIBUTING.rst, etc.
+# https://github.com/mgedmin/restview
+restview

dev-requirements.txt

-setuptools
-wheel
-cython>=0.27.3 ; python_version < '3.7'
-# Thread state changes, especially in Pythran seem to need this,
-# which in turn requires CPython 3.7.0a3 or above
-git+https://github.com/cython/cython#egg=cython ; python_version >= '3.7'
-greenlet>=0.4.10 ; python_version < '3.7'
-# Thread state changes again; requires 0.4.13, as yet unreleased
-git+https://github.com/python-greenlet/greenlet#egg=greenlet ; python_version >= '3.7'
-pylint>=1.8.0
-# pyyaml is included here and doesn't install on travis with 3.7a3
-prospector[with_pyroma] ; python_version < '3.7'
-coverage>=4.0
-coveralls>=1.0
-# See version requirements in setup.py
-cffi
-futures
-dnspython
-idna
-# Makes tests faster
-psutil
-# For viewing README.rst (restview --long-description),
-# CONTRIBUTING.rst, etc.
-# https://github.com/mgedmin/restview
-restview
+-r ci-requirements.txt
 -e .