Explain each stage of a MongoDB pipeline and flag slow patterns.
Paste a pipeline array or a full db.collection.aggregate([...]) call. Shell syntax is fine: unquoted keys, single quotes, ISODate(), ObjectId().
Nothing is executed against a database. Analysis runs in your browser.
Paste a pipeline to explain it
Each stage is described in plain English, and patterns that stop MongoDB using an index or that scan more than needed are flagged.