caliper/Release Notes.txt at master · point85/caliper · GitHub

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				   Caliper Units of Measurement
						   RELEASE NOTES

(1)  1.2.7, February 3, 2024:
	- Created a Maven repository at io.github.point85.caliper:
	<dependency>
		<groupId>io.github.point85</groupId>
		<artifactId>caliper</artifactId>
		<version>1.2.7</version>
	</dependency>

	- Upgraded gson to version 2.10.1
	- Upgraded hamcrest to 2.2
	- Removed unused Maven dependencies

(2)  1.2.8, June 10, 2025:
	- Constant: fixed AVOGADRO typo
	- MeasurementSytem: defined EPSILON for floating point precision; made ctor private
	- Prefix:  made prefixes a synchronized list; peta typo; used EPSILON in fromFactor() comparison
	- Quantity: used EPSILON in equals() comparison; added BigDecimal case in createAmount(); checked for division by 0 in divide(double)
	- UnitOfMeasure: synchronized setConversion()

(3)  1.3.0, February 16, 2026:
	- Claude Sonnet 4.5 changes:
Performance Improvements
Prefix.java - Optimized prefix lookup:

Changed from O(n) linear search to O(1) HashMap lookup in fromName()
Added nameMap for fast name-based lookups
Made prefix list unmodifiable to prevent external modification
UnitOfMeasure.java - Eliminated unnecessary boxing:

Replaced Double.valueOf().compareTo() with Double.compare() in 4 locations
Added initial capacity to HashMap in multiplyOrDivide() method
Added initial capacity to Reducer's terms HashMap (16 elements)
Quantity.java - Optimized comparisons:

Replaced Double.valueOf().compareTo() with Double.compare() in compare() method
Added initial capacity to ArrayList in convert(List<UnitOfMeasure>) method
MeasurementSystem.java - Collection optimization:

Added initial capacity (32) to ArrayList in getUnitsOfMeasure() method
UnitType.java - Immutability improvement:

Made typeMap unmodifiable using Collections.unmodifiableMap()
Added initial capacity calculation for HashMap

Bug Fixes
Prefix.java - Null safety:

Added null check in fromName() method to prevent NullPointerException
UnitOfMeasure.java - Null safety in equals():

Added null checks for getAbscissaUnit() and getSymbol() to prevent NullPointerException
Improved defensive programming in equality checks