with large property maps, even a binary search starts
showing up, but we can do a O(1) search here by using a map
Change-Id: Ie7916076073e6dd393f0a1fb5a0db1b973999408
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/171173
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
Tested-by: Jenkins
