count load maxscene time

I'm struggle with script that will save all objects in selection one by one as max file with this same name and check - count loading time for each of object. Is it possible to do something like this? Please help.

it should look like this:

sceneName = maxFilePath + "OBJTEST.max"

for o in selection do
saveNodes o sceneName -- <-- It seems this don't work
---- < here I have to check how much time(in digits) past from moment
---- max start save node till max finish save node so SAVING TIME
---- here I need something like if loadtime>n then do ()