If people wants to harvest some changes from Squeak, please do it. Collections Speed up testing different sized strings. Interval >> #sum is now O(1) instead of O(n). Introduction of Set>>#addNewElement: optimizes graph-traversal. Slightly faster SequenceableCollection >> #copyUpT (for ByteString receivers). Stricter and faster implementation of String >> #format:. Optimized Interval >> #sum, OrderedCollection >> #at: and OrderedCollection >> #at:put:. Simpler and faster Character >> #tokenish. Speed-up #endsWith: for strings. Morphic Sped up #valueOfProperty:ifAbsent: and friends. Symbol table improvements such as thread-safety and consistent enumeration. Threadsafe random.
Squeak 4.6 "Spur" Release Notes http://wiki.squeak.org/squeak/6192
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