too many frequent tiny allocations in a short time span I believe

Change-Id: Iaccae6db7d18c9cd2f909f94dbe81a7dc6458bc2
Reviewed-on: https://gerrit.libreoffice.org/53589Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>