• String caching now uses buckets to improve concurrent decoding. On 64-bit
  systems, the table grows from 64 KiB to 72 KiB and is allocated only when an
  eligible string is decoded. Entry capacity grows from 4,096 to 7,168, which
  can also increase retained string memory. Pull request by James Ranson.
  GitHub #252.
• Standalone mmdbdata.NewDecoder calls now default to no string cache.
  This reduces setup cost for short-lived decoders. Use the new
  mmdbdata.WithStringCache() option for repeated reads through a retained
  decoder or its cursors. Without the option, repeated string reads can
  allocate more and run slower. Cursors supplied by a Reader continue to
  share its caching policy.
• Added mmdbdata.Decoder.CursorAt(offset) to read independent records from
  one buffer without changing the decoder's position. The cursors share its
  string cache and can be read concurrently while the buffer remains valid
  and unchanged.
• Reduced maxminddb-gen generation and test time by reusing loaded dependencies
  during output validation, avoiding duplicate syntax work, and omitting unused
  parser metadata. Full type checking and generated-output validation remain
  enabled. Validation normalizes paths from package loaders to avoid false
  duplicate declarations. GitHub #256.
• Reduced reflection decoding overhead for string struct fields, including
  fields read through database pointers, while retaining existing validation
  and custom unmarshaling behavior.
• Shared string-cache handling between map keys and decoded string values.
• Fixed Reader.Verify() accepting invalid UTF-8 values overwritten by
  duplicate map keys. Verification now checks every encoded string in the data
  and metadata sections, including overwritten values.
• Fixed maxminddb-gen rejecting fields that use type aliases of supported
  types, including aliases in nested containers.
• Fixed maxminddb-gen panicking when a byte slice or its elements use an
  imported type alias.
• Fixed maxminddb-gen emitting inaccessible type names for imported container
  aliases with private element or map key types. Generated helpers infer those
  types while retaining allocation, overflow, and size checks.
• Fixed maxminddb-gen emitting private byte aliases in constraints for nested
  byte slice aliases.
• Fixed maxminddb-gen emitting inaccessible types for imported aliases whose
  generic arguments contain private types, fields, or methods.