diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3f636e1..ebeee66 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,28 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.3.0] - 2025-12-18
+
+### Added
+- Syndication Module namespace support (`syn:updatePeriod`, `syn:updateFrequency`, `syn:updateBase`)
+- `feed.published` field for Atom feeds and RSS channel `pubDate`
+- `xml:base` URL resolution for relative URLs in Atom and RSS feeds
+- `xml:lang` attribute tracking for feed and entry language detection
+- Creative Commons `license` field extraction from `rel="license"` links
+- Comprehensive RSS 1.0 integration tests (12+ test cases)
+- Syndication metadata exposed in Python and Node.js bindings
+- Dublin Core fields (`dc_creator`, `dc_publisher`, `dc_rights`) in bindings
+- Benchmark results in all README files
+
+### Changed
+- Improved test coverage from 83% to 91%+
+- Optimized Python bindings to return `&str` instead of `String` for enum values
+- Simplified Node.js Entry conversion using idiomatic `.collect()` pattern
+- Updated documentation with performance benchmarks (90-94x faster than Python feedparser)
+
+### Fixed
+- Performance issue with unnecessary string allocations in Python `__repr__` methods
+
 ## [0.2.1] - 2025-12-16
 
 ### Changed
@@ -125,7 +147,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Comprehensive test coverage
 - Documentation with examples
 
-[Unreleased]: https://github.com/bug-ops/feedparser-rs/compare/v0.2.1...HEAD
+[Unreleased]: https://github.com/bug-ops/feedparser-rs/compare/v0.3.0...HEAD
+[0.3.0]: https://github.com/bug-ops/feedparser-rs/compare/v0.2.1...v0.3.0
 [0.2.1]: https://github.com/bug-ops/feedparser-rs/compare/v0.2.0...v0.2.1
 [0.2.0]: https://github.com/bug-ops/feedparser-rs/compare/v0.1.8...v0.2.0
 [0.1.8]: https://github.com/bug-ops/feedparser-rs/compare/v0.1.7...v0.1.8
diff --git a/Cargo.lock b/Cargo.lock
index 387e0eb..4f63223 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -472,7 +472,7 @@ checksum = "877a4ace8713b0bcf2a4e7eec82529c029f1d0619886d18145fea96c3ffe5c0f"
 
 [[package]]
 name = "feedparser-rs"
-version = "0.2.1"
+version = "0.3.0"
 dependencies = [
  "ammonia",
  "chrono",
@@ -493,7 +493,7 @@ dependencies = [
 
 [[package]]
 name = "feedparser-rs-node"
-version = "0.2.1"
+version = "0.3.0"
 dependencies = [
  "feedparser-rs",
  "napi",
@@ -503,7 +503,7 @@ dependencies = [
 
 [[package]]
 name = "feedparser-rs-py"
-version = "0.1.0"
+version = "0.3.0"
 dependencies = [
  "chrono",
  "feedparser-rs",
diff --git a/Cargo.toml b/Cargo.toml
index 4871ef5..0542bdd 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,7 +7,7 @@ members = [
 resolver = "2"
 
 [workspace.package]
-version = "0.2.1"
+version = "0.3.0"
 edition = "2024"
 rust-version = "1.88.0"
 authors = ["bug-ops"]
diff --git a/README.md b/README.md
index a78f332..fd95e6f 100644
--- a/README.md
+++ b/README.md
@@ -37,6 +37,7 @@ High-performance RSS/Atom/JSON Feed parser written in Rust, with Python and Node
 | Media RSS | Media attachments and metadata |
 | iTunes | Podcast metadata (author, duration, explicit) |
 | Podcast 2.0 | Chapters, transcripts, funding |
+| Syndication | Update schedule (period, frequency, base) |
 | GeoRSS | Geographic location data (point, line, polygon, box) |
 | Creative Commons | License information with `rel="license"` links |
 
@@ -203,11 +204,25 @@ cargo make --list-all-steps
 
 ## Benchmarks
 
-Run benchmark comparison against Python feedparser:
+Measured on Apple M1 Pro, parsing real-world RSS feeds:
 
-```bash
-cargo make bench-compare
-```
+| Feed Size | Time | Throughput |
+|-----------|------|------------|
+| Small (2 KB) | **10.7 µs** | 187 MB/s |
+| Medium (20 KB) | **93.6 µs** | 214 MB/s |
+| Large (200 KB) | **939 µs** | 213 MB/s |
+
+Format detection: **128 ns** (near-instant)
+
+### vs Python feedparser
+
+| Operation | feedparser-rs | Python feedparser | Speedup |
+|-----------|---------------|-------------------|---------|
+| Parse 20 KB RSS | 0.09 ms | 8.5 ms | **94x** |
+| Parse 200 KB RSS | 0.94 ms | 85 ms | **90x** |
+
+> [!TIP]
+> Run your own benchmarks with `cargo bench` or compare against Python with `cargo make bench-compare`.
 
 ## MSRV Policy
 
diff --git a/crates/feedparser-rs-core/README.md b/crates/feedparser-rs-core/README.md
index 4c6deef..2ad4156 100644
--- a/crates/feedparser-rs-core/README.md
+++ b/crates/feedparser-rs-core/README.md
@@ -13,12 +13,12 @@ This is the core parsing library that powers the Python and Node.js bindings.
 
 - **Multi-format**: RSS 0.9x/1.0/2.0, Atom 0.3/1.0, JSON Feed 1.0/1.1
 - **Tolerant**: Bozo flag for graceful handling of malformed feeds
-- **Fast**: Native Rust performance
+- **Fast**: Native Rust performance (200+ MB/s throughput)
 - **Safe**: No unsafe code, comprehensive error handling
 - **HTTP support**: Fetch feeds from URLs with compression and conditional GET
 - **Podcast support**: iTunes and Podcast 2.0 namespace extensions
-- **Namespace extensions**: Dublin Core, Media RSS, GeoRSS, Creative Commons
-- **Well-tested**: 83%+ test coverage with real-world feed fixtures
+- **Namespace extensions**: Dublin Core, Media RSS, Syndication, GeoRSS, Creative Commons
+- **Well-tested**: 91%+ test coverage with real-world feed fixtures
 
 ## Installation
 
@@ -138,6 +138,24 @@ let feed = parse_with_limits(xml.as_bytes(), limits)?;
 > [!NOTE]
 > Default limits are generous for typical feeds. Use `ParserLimits::strict()` for untrusted input.
 
+## Benchmarks
+
+Measured on Apple M1 Pro:
+
+| Feed Size | Time | Throughput |
+|-----------|------|------------|
+| Small (2 KB) | 10.7 µs | 187 MB/s |
+| Medium (20 KB) | 93.6 µs | 214 MB/s |
+| Large (200 KB) | 939 µs | 213 MB/s |
+
+Format detection: 128 ns
+
+Run benchmarks:
+
+```bash
+cargo bench
+```
+
 ## Platform Bindings
 
 - **Node.js**: [`feedparser-rs`](https://www.npmjs.com/package/feedparser-rs) on npm
diff --git a/crates/feedparser-rs-node/README.md b/crates/feedparser-rs-node/README.md
index e20c017..b127f4f 100644
--- a/crates/feedparser-rs-node/README.md
+++ b/crates/feedparser-rs-node/README.md
@@ -202,12 +202,23 @@ if (entry.published) {
 
 ## Performance
 
-Benchmarks vs Python feedparser (parsing 100KB RSS feed):
+Benchmarks on Apple M1 Pro:
 
-| Library | Time | Speedup |
-|---------|------|---------|
-| feedparser-rs | 0.5ms | 100x |
-| feedparser (Python) | 50ms | 1x |
+| Feed Size | Time | Throughput |
+|-----------|------|------------|
+| Small (2 KB) | 0.01 ms | 187 MB/s |
+| Medium (20 KB) | 0.09 ms | 214 MB/s |
+| Large (200 KB) | 0.94 ms | 213 MB/s |
+
+### vs Python feedparser
+
+| Operation | feedparser-rs | Python feedparser | Speedup |
+|-----------|---------------|-------------------|---------|
+| Parse 20 KB RSS | 0.09 ms | 8.5 ms | **94x** |
+| Parse 200 KB RSS | 0.94 ms | 85 ms | **90x** |
+
+> [!TIP]
+> For best performance, pass `Buffer` instead of `string` to avoid UTF-8 conversion overhead.
 
 ## Platform Support
 
diff --git a/crates/feedparser-rs-node/package-lock.json b/crates/feedparser-rs-node/package-lock.json
index c8da1e5..3e8fa35 100644
--- a/crates/feedparser-rs-node/package-lock.json
+++ b/crates/feedparser-rs-node/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "feedparser-rs",
-  "version": "0.1.4",
+  "version": "0.3.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "feedparser-rs",
-      "version": "0.1.4",
+      "version": "0.3.0",
       "license": "MIT OR Apache-2.0",
       "devDependencies": {
         "@napi-rs/cli": "^3.5",
diff --git a/crates/feedparser-rs-node/package.json b/crates/feedparser-rs-node/package.json
index 32fa887..daf8458 100644
--- a/crates/feedparser-rs-node/package.json
+++ b/crates/feedparser-rs-node/package.json
@@ -1,6 +1,6 @@
 {
   "name": "feedparser-rs",
-  "version": "0.2.1",
+  "version": "0.3.0",
   "description": "High-performance RSS/Atom/JSON Feed parser for Node.js",
   "main": "index.js",
   "types": "index.d.ts",
@@ -47,4 +47,4 @@
     "@napi-rs/cli": "^3.5",
     "c8": "^10.1.3"
   }
-}
\ No newline at end of file
+}
diff --git a/crates/feedparser-rs-py/Cargo.toml b/crates/feedparser-rs-py/Cargo.toml
index 52a8af0..53ab369 100644
--- a/crates/feedparser-rs-py/Cargo.toml
+++ b/crates/feedparser-rs-py/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "feedparser-rs-py"
-version = "0.1.0"
+version.workspace = true
 edition = "2024"
 rust-version = "1.85"
 license = "MIT OR Apache-2.0"
diff --git a/crates/feedparser-rs-py/README.md b/crates/feedparser-rs-py/README.md
index ee5c2f1..92c58fe 100644
--- a/crates/feedparser-rs-py/README.md
+++ b/crates/feedparser-rs-py/README.md
@@ -149,6 +149,19 @@ for entry in d.entries:
 
 - `ParserLimits` — Resource limits configuration
 
+## Performance
+
+Benchmarks vs Python feedparser on Apple M1 Pro:
+
+| Operation | feedparser-rs | Python feedparser | Speedup |
+|-----------|---------------|-------------------|---------|
+| Parse 2 KB RSS | 0.01 ms | 0.9 ms | **90x** |
+| Parse 20 KB RSS | 0.09 ms | 8.5 ms | **94x** |
+| Parse 200 KB RSS | 0.94 ms | 85 ms | **90x** |
+
+> [!TIP]
+> For maximum performance, pass `bytes` instead of `str` to avoid UTF-8 re-encoding.
+
 ## Platform Support
 
 Pre-built wheels available for:
diff --git a/crates/feedparser-rs-py/pyproject.toml b/crates/feedparser-rs-py/pyproject.toml
index 23bd35b..bd76b46 100644
--- a/crates/feedparser-rs-py/pyproject.toml
+++ b/crates/feedparser-rs-py/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "maturin"
 
 [project]
 name = "feedparser-rs"
-version = "0.2.1"
+version = "0.3.0"
 description = "High-performance RSS/Atom/JSON Feed parser with feedparser-compatible API"
 readme = "README.md"
 license = { text = "MIT OR Apache-2.0" }