Improve initial sync of macOS File Provider module for VFS

[claucambra]

⚠️ Before submitting, please verify the following: ⚠️

• This is a bug, not a question or a configuration issue.
• This issue is not already reported on Github (I've searched it).
• Nextcloud Server and Desktop Client are up to date. See Server Maintenance and Release Schedule and Desktop Releases for supported versions.
• I agree to follow Nextcloud's Code of Conduct

Bug description

The initial full enumeration of the subject server done by the file provider module is extremely slow, leading to a large amount of time passing before the user is able to interact with files in the relevant domain

Steps to reproduce

1. Set up account with file provider module enabled
2. Wait for enumeration of server files to begin
3. Wait for enumeration of server files to end
4. Wait some more

Expected behavior

Delay between a file provider enumeration beginning and it being responsive should be minimal

Which files are affected by this bug

All files affected

Operating system

Mac OS

Which version of the operating system you are running.

macOS 13.0

Package

Other

Nextcloud Server version

23.0.1

Nextcloud Desktop Client version

Master

Is this bug present after an update or on a fresh install?

Fresh desktop client install

Are you using the Nextcloud Server Encryption module?

Encryption is Disabled

Are you using an external user-backend?

• Default internal user-backend
• LDAP/ Active Directory
• SSO - SAML
• Other

Nextcloud Server logs

No response

Additional info

No response

[marcotrevisan]

Hi @claucambra,

just for the records, using the version 2 of the VFS Beta build, I'm finding it slower than version 1 in fetching the file contents. There's a lag (many seconds) before the actual download starts.
If this is a known behaviour please ignore this message.

Kind regards