Spotted today while doing a fully scap, rebuildLocalisationCache.php is run with --threads=30 but each sub process ends up on the same CPU. That defeat parallelism entirely :]
```
\_ /usr/bin/python /usr/bin/scap sync testwiki to php-1.32.0-wmf.20 and rebuild l10n cache - T191066
\_ /bin/sh -c sudo -u www-data -n -- /usr/local/bin/mwscript rebuildLocalisationCache.php --wiki="testwiki" --outdir="/tmp/scap_l10n_3999488278" --threads=30 --force --quiet
\_ sudo -u www-data -n -- /usr/local/bin/mwscript rebuildLocalisationCache.php --wiki=testwiki --outdir=/tmp/scap_l10n_3999488278 --threads=30 --force --quiet
\_ /bin/bash /usr/local/bin/mwscript rebuildLocalisationCache.php --wiki=testwiki --outdir=/tmp/scap_l10n_3999488278 --threads=30 --force --quiet
\_ php /srv/mediawiki-staging/multiversion/MWScript.php rebuildLocalisationCache.php --wiki=testwiki --outdir=/tmp/scap_l10n_3999488278 --threads=30 --force --quiet
\_ php /srv/mediawiki-staging/multiversion/MWScript.php rebuildLocalisationCache.php --wiki=testwiki --outdir=/tmp/scap_l10n_3999488278 --threads=30 --force --quiet
\_ php /srv/mediawiki-staging/multiversion/MWScript.php rebuildLocalisationCache.php --wiki=testwiki --outdir=/tmp/scap_l10n_3999488278 --threads=30 --force --quiet
\_ php /srv/mediawiki-staging/multiversion/MWScript.php rebuildLocalisationCache.php --wiki=testwiki --outdir=/tmp/scap_l10n_3999488278 --threads=30 --force --quiet
\_ php /srv/mediawiki-staging/multiversion/MWScript.php rebuildLocalisationCache.php --wiki=testwiki --outdir=/tmp/scap_l10n_3999488278 --threads=30 --force --quiet
\_ php /srv/mediawiki-staging/multiversion/MWScript.php rebuildLocalisationCache.php --wiki=testwiki --outdir=/tmp/scap_l10n_3999488278 --threads=30 --force --quiet
\_ php /srv/mediawiki-staging/multiversion/MWScript.php rebuildLocalisationCache.php --wiki=testwiki --outdir=/tmp/scap_l10n_3999488278 --threads=30 --force --quiet
\_ php /srv/mediawiki-staging/multiversion/MWScript.php rebuildLocalisationCache.php --wiki=testwiki --outdir=/tmp/scap_l10n_3999488278 --threads=30 --force --quiet
\_ php /srv/mediawiki-staging/multiversion/MWScript.php rebuildLocalisationCache.php --wiki=testwiki --outdir=/tmp/scap_l10n_3999488278 --threads=30 --force --quiet
\_ php /srv/mediawiki-staging/multiversion/MWScript.php rebuildLocalisationCache.php --wiki=testwiki --outdir=/tmp/scap_l10n_3999488278 --threads=30 --force --quiet
\_ php /srv/mediawiki-staging/multiversion/MWScript.php rebuildLocalisationCache.php --wiki=testwiki --outdir=/tmp/scap_l10n_3999488278 --threads=30 --force --quiet
```