This is a simple script to create lua file to test http multipart upload.
For example you want to post N files using multipart
./wrkbench.py -F <file1> -F <file2> -H "Expect:--http1.1" -o /tmp
This will create a folder /tmp/wrkbench-<seconds-since-epoch>
run wrk command with -s post.lua to start the test. Example
wrk -t1 -c1 -d5s -R1 -s /tmp/wrkdesk-1585595404/post.lua https://192.168.2.2:8443/uploader