add perf test driver
drwxr-xr-x - datatype
drwxr-xr-x - include
-rw-r--r-- 1905 license.txt
-rw-r--r-- 3840 makefile
drwxr-xr-x - map
-rwxr-xr-x 125 perf.sh
drwxr-xr-x - runtime
drwxr-xr-x - test
-rw-r--r-- 1288 todo
drwxr-xr-x - txn