RFR: 8149330: Capacity of StringBuilder should not get close to Integer.MAX_VALUE unless necessary
ivan.gerasimov at oracle.com
Mon Feb 22 19:20:22 UTC 2016
When the capacity of a StringBuilder needs to be increased (either due
to append() or due to explicit call to ensureCapacity()), the new
capacity is calculated as "twice the old capacity, plus 2", rounded down
Because of that, StringBuilder throws OOM early, even though there may
be room to grow.
The proposed solution is to reserve a few bytes at the top of the range
and only try to allocate them if absolutely required.
The regression test is @ignored by default, as it is too greedy for memory.
Would you please help review the fix?
More information about the core-libs-dev