16 processes seems to make PyPy very slow

Author: dstufft

.travis.yml

@@ -13,10 +13,9 @@ before_install:
 install:
   - pip install --upgrade setuptools
   - pip install pytest pytest-xdist git+https://github.com/pypa/virtualenv@develop#egg=virtualenv scripttest>=1.3 mock
-# Using -n 16 because multiprocessing says a travis box has 16 CPUs
 script:
   - "if [[ $TRAVIS_PYTHON_VERSION == '3.2' ]]; then py.test -v; fi"
-  - "if [[ $TRAVIS_PYTHON_VERSION != '3.2' ]]; then py.test -v -n 16; fi"
+  - "if [[ $TRAVIS_PYTHON_VERSION != '3.2' ]]; then py.test -v -n 8; fi"
 notifications:
   irc: "irc.freenode.org#pip"
 branches: