commit 11cd8fd41923ae32bcffd7c01dfbed9fcb2b6583
author Ömer Ağacan <omersa@google.com> Fri May 09 14:42:50 2025
committer Ömer Ağacan <omersa@google.com> Fri May 09 14:42:50 2025
tree 6891a9cd4caa48eb86a5fdb40c28cb9307e75380
parent 006d3aa9cbf27a8f8925e2eb96bef7754792124a

Add sparse enum decoding benchmarks

With upcoming change we'll improve decoding performance of enums, but
there will be a difference between "sparse" and "dense" enum decoding
performance even though they'll both be faster.

To be able to measure the difference add a "sparse" enum type and a
benchmark for decoding it.

"Sparse" means the enum has large gaps between known enum values, or
negative enum values.

When decoding this kind of enums, the mapping from the wire `varint` to
the Dart value for the enum needs to be done by binary search, map
lookup, or similar.

For "dense" enums, we can have a list of enum values and index the list
directly with the `varint` value, after a range check.

These changes will be done in the follow-up PR(s).