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-Fri Nov 9 16:08:43 2012 Sokolov Yura funny-falcon <funny.falcon@gmail.com>
+Fri Nov 9 16:08:46 2012 Sokolov Yura funny-falcon <funny.falcon@gmail.com>
+
+ * array.c: speedup Array#unshift by using space in shared array.
+ [Feature #6638]
+ - when array owns its shared array (ARY_SHARED_NUM == 1), and there
+ is enough space then try unshift values directly into shared
+ array.
+ - when resulting array is big (~>64 items) then make it shared with
+ enough room for future #unshifts, and then insert into shared
+ array.
* array.c (rb_ary_splice): use shared array in rb_ary_slice.
[Feature #6638]