Update README version references and changelog date for 4.99.0 release

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: jdereg

README.md

@@ -117,15 +117,15 @@ To include in your project:
 
 **Gradle**
 ```groovy
-implementation 'com.cedarsoftware:json-io:4.98.0'
+implementation 'com.cedarsoftware:json-io:4.99.0'
 ```
 
 **Maven**
 ```xml
 <dependency>
   <groupId>com.cedarsoftware</groupId>
   <artifactId>json-io</artifactId>
-  <version>4.98.0</version>
+  <version>4.99.0</version>
 </dependency>
 ```
 
@@ -141,7 +141,7 @@ json-io provides a Spring Boot starter for seamless integration with Spring MVC
 <dependency>
   <groupId>com.cedarsoftware</groupId>
   <artifactId>json-io-spring-boot-starter</artifactId>
-  <version>4.98.0</version>
+  <version>4.99.0</version>
 </dependency>
 ```
 
@@ -167,7 +167,7 @@ json-io provides a Spring AI module that reduces LLM token usage by ~40-50% usin
 <dependency>
   <groupId>com.cedarsoftware</groupId>
   <artifactId>json-io-spring-ai-toon</artifactId>
-  <version>4.98.0</version>
+  <version>4.99.0</version>
 </dependency>
 ```
 

changelog.md

@@ -1,6 +1,6 @@
 ### Revision History
 
-#### 4.99.0
+#### 4.99.0 - 2026-03-28
 * **PERFORMANCE**: `ToonWriter.needsQuoting()` — replaced multi-method dispatch chain (`isReservedScalarLiteral()` + `isSimpleUnquotedAsciiToken()` + `computeNeedsQuoting()`) with a single-pass `scanNeedsQuoting()` method. Uses a pre-built `boolean[128]` lookup table per delimiter, reducing the inner character scan from 8 branch comparisons to 1 array access per character. Reserved-literal check merged inline with `switch(first)` + length gate. `looksLikeNumber()` now guarded by first-char check — only called for strings starting with `0-9`, `+`, or `.` (~90% of calls eliminated). `Character.isWhitespace()` replaced with `<= ' '`. JFR shows `needsQuoting` dropped from 383 samples (#1 hotspot) to 25 samples — a **93.5% reduction**.
 * **PERFORMANCE**: `ToonReader.readLineRaw()` — now uses `FastReader.readLine()` instead of `readUntil()` + separate `read()` + pushback for line-ending handling. Eliminates per-line method call overhead and the `\r\n` pushback round-trip. JFR shows TOON line-reading improved 28%, and `FastReader.read()` calls halved.
 * **PERFORMANCE**: `JsonWriter.writePrimitive()` — added small-integer String cache (-128 to 16384) matching ToonWriter's range. Avoids `Integer.toString()` allocation for common integer values during JSON serialization. JFR shows 898 allocation samples eliminated from `Integer.toString ← writePrimitive` path.