[Question] What's the most efficient way to count blobs under a folder?

[GZTimeWalker]

What's the most efficient way to count under a folder?

Using Count after ListAsync doesn't seem to be a very elegant approach, as it reads a lot of metadata from the file - even if I only need a single count number.

[robinrodricks]

We could introduce a new count method. Suggest the signature. Also suggest which underlying AWS/Azure .NET SDK API it would use.

Which cloud are you using?

[GZTimeWalker]

Not much, I knew FluentStorage just a day before...

And about the storage, I have only used minio and aws s3.

[GZTimeWalker]

For signature, I think this is fine:

/// <summary>
/// Returns the count of available blobs
/// </summary>
/// <param name="cancellationToken"></param>
/// <returns>Count of blobs</returns>
Task<int> CountAsync(string fullPath, CancellationToken cancellationToken = default);

For most cases, count is no need to do recursively. As expected, is should only access one folder blob.

NOTE: maybe an option for count Regular Files or Folders or both of them.