Bump to 0.4.0-beta.1 (#196)

* Bump to 0.4.0-beta.1

* move ref

README.md

@@ -11,7 +11,7 @@
 [pypi-img]: https://img.shields.io/pypi/dm/obstore
 [pypi-link]: https://pypi.org/project/obstore/
 
-Simple, fast integration with object storage services like Amazon S3, Google Cloud Storage, Azure Blob Storage, and S3-compliant APIs like Cloudflare R2.
+The simplest, highest-throughput [^1] interface to Amazon S3, Google Cloud Storage, Azure Blob Storage, and S3-compliant APIs like Cloudflare R2.
 
 - Sync and async API with **full type hinting**.
 - **Streaming downloads** with configurable chunking.
@@ -27,6 +27,8 @@ Simple, fast integration with object storage services like Amazon S3, Google Clo
 
 <!-- For Rust developers looking to add object_store support to their Python packages, refer to pyo3-object_store. -->
 
+[^1]: Benchmarking is currently ongoing, but [early results](https://github.com/geospatial-jeff/pyasyncio-benchmark/blob/2d8ee4df8c2d93463323394f09fd094ad0381122/test_results/cog_header_results.csv) indicate 9x higher throughput than aioboto3 and fsspec.
+
 ## Installation
 
 To install obstore using pip:

obstore/Cargo.toml

@@ -1,9 +1,9 @@
 [package]
 name = "obstore"
-version = "0.3.0"
+version = "0.4.0-beta.1"
 authors = { workspace = true }
 edition = { workspace = true }
-description = "A Python interface to the Rust object_store crate, providing a uniform API for interacting with object storage services and local files."
+description = "The simplest, highest-throughput interface to Amazon S3, Google Cloud Storage, Azure Blob Storage, and S3-compliant APIs like Cloudflare R2."
 readme = "README.md"
 repository = { workspace = true }
 homepage = { workspace = true }