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The way that classes are declared was changed. Several methods and properties were moved to class scope, reducing overall memory usage of the library. Several small optimizations that speed up the hash generation were also made.
A number of large additions were made, including the much-requested HMAC algorithm and support for hex-based inputs. Several functions were tweaked, resulting in a significant performance boost. A different JavaScript compressor is used, which yields a higher file compression ratio.
In order to prevent global variable pollution, all functionality has been moved to a jsSHA object. With this change, the interface used to calculate hashes has changed significantly. The object-orientated architecture also allowed for hash results to be cached internally, which can lead to performance gains. jsSHA (specifically sha.js) now validates against JSLint using "Recommended" settings. Also, the size of the files meant for production use was shrunk drastically.
