From the [DB.FreelistType] GoDoc:
// FreelistType sets the backend freelist type. There are two options. Array which is simple but endures
// dramatic performance degradation if database is large and fragmentation in freelist is common.
// The alternative one is using hashmap, it is faster in almost all circumstances
// but it doesn't guarantee that it offers the smallest page id available. In normal case it is safe.
// The default type is array
FreelistType FreelistType
While the default is still `FreelistArrayType`, the package shows that
the intent is to make `FreelistMapType` the default in future;
https://pkg.go.dev/go.etcd.io/bbolt@v1.5.0#pkg-constants
// TODO(ahrtr): eventually we should (step by step)
// 1. default to `FreelistMapType`;
// 2. remove the `FreelistArrayType`, do not export `FreelistMapType`
// and remove field `FreelistType' from both `DB` and `Options`;
[DB.FreelistType]: https://pkg.go.dev/go.etcd.io/bbolt@v1.5.0#DB.FreelistType
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
The `ErrBackendNotSupported` error was no longer used since [moby@37cbdeb].
[moby@37cbdeb]: 37cbdeb1f2
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
The `BOLTDB` const and related `Backend` type are no longer used since
[moby@ed08486].
[moby@ed08486]: ed08486ec7
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
