Which TDigest do you recommend?

[adaviding]

It looks like you have 4 kinds of TDigest in this codebase.

• AVLTreeDigest
• ArrayDigest
• MergingDigest
• TreeDigest

I cannot tell which implementation is the most highly recommended. Do you have a suggestion?

I am building a MapReduce job using Apache Spark.

[adaviding]

Nevermind.

I just saw the comments to the method TDigest.createDigest. In these comments, you have identified the AVLTreeDigest.

[tdunning]

Actually, you should call createDigest to create a digest. That will give you an instance of the current best kind of t-digest.