Currently I fetch emails using an iterator this way:
for item in account.inbox.filter(datetime_received__gt=__LAST_ANALYSYS__+timedelta(0,1)):
I also test if type(item) == Message: as another filter layer.
Issue: it takes 5-10 mins to fetch 400+ messages; I have a macbook pro 3.5 GHz Dual-Core Intel Core i7 and 16 GB 2133 MHz LPDDR3. I have reasonably fast broadband connect.
The app will be migrated to Azure soon. Will the retrieval speed improve?
Or, is there another trick i can employ? I saw a post about using the only(attribs) nethod, but not sure if this helps materially, or how it can be combined with the account.inbox.filter method? Thank you.
Just try out the .only() method and see if it helps your use-case. Usually it does, because without it, you'll be fetching everything; attachments, MIME content, and other heavy fields. If you have a folder where the ratio of Message items to other item types is low, you will also benefit by doing a filter on item_class so you're filtering server-side, not client-side.
.only() supports chaining, just like Django QuerySets: some_folder.filter(...).only(...). See https://ecederstrand.github.io/exchangelib/#searching