LMDB is a very fast database which maps committed records into memory.

aclocal --force && autoheader --force && autoconf --force

then run

./configure

then call make swi to compile for SWI Prolog, or make gp to compile for GNU Prolog. A simple make will produce both.

mkdir -p ${HOME}/lib/sbcl
cp src/lmdb.qlf ~/lib/sbcl/
cp pllmdb-* ~/lib/sbcl/pllmdb

add to the search path for SWI Prolog:

echo ":- assertz(file_search_path(sbcl,'${HOME}/lib/sbcl'))." >> ${HOME}/.config/swi-prolog/init.pl

run make check to start all tests using SWI Prolog and GNU Prolog. Note the time to completion.

this test will populate a database with one million of records:

swipl -l test/t3.pl -g test

this test reads them all back and verifies them:

swipl -l test/t4.pl -g test