[2.7] Build docs in parallel (GH-1842). (GH-1873)
(cherry picked from commit eba68e2c42e149acecb15bbeb692786e2540157d)
diff --git a/.travis.yml b/.travis.yml
index 568b6f0..df66713 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -32,7 +32,7 @@
# (Updating the version is fine as long as no warnings are raised by doing so.)
- python -m pip install sphinx~=1.6.1
script:
- - make check suspicious html SPHINXOPTS="-q -W"
+ - make check suspicious html SPHINXOPTS="-q -W -j4"
# Travis provides only 2 cores, so don't overdue the parallelism and waste memory.
before_script: