melanie witt b892aad548 Run sphinx-build in parallel for releasenotes ... Since the recent releases and upper-constraints bumps for openstackdocstheme 2.1.0 and reno 3.1.0, both sphinx extensions now support safe parallel reading. This adds the '-j auto' option to the sphinx-build command for building release notes to parallelize the build over multiple CPUs. This effort was inspired by the nova build-openstack-releasenotes job which typically takes 52m to 1h to run. The job timeout is 1h, so we are occasionally seeing TIMED_OUT job failures. With parallel sphinx-build, the job run time is reduced down to 15m. Change-Id: If3c615119b1a72ce294e22685ddc2dcd6b63f4a0		2020-05-15 00:35:29 +00:00
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main.yaml	Run sphinx-build in parallel for releasenotes	2020-05-15 00:35:29 +00:00