Michael Meeks committed a patch related to this issue. It has been pushed to "libreoffice-3-5":
http://cgit.freedesktop.org/libreoffice/core/commit/?id=9ecc734f631ce4597782b17b071752b8fa223d49&g=libreoffice-3-5
fdo#35270 - enable caching of grammar checker properties
It will be available in LibreOffice 3.5.4.
Michael Meeks committed a patch related to this issue.
It has been pushed to "libreoffice-3-5":
http:// cgit.freedeskto p.org/libreoffi ce/core/ commit/ ?id=9ecc734f631 ce4597782b17b07 1752b8fa223d49& g=libreoffice- 3-5
fdo#35270 - enable caching of grammar checker properties
It will be available in LibreOffice 3.5.4.