https://bz.apache.org/bugzilla/show_bug.cgi?id=64015

--- Comment #3 from Tim Allison <talli...@apache.org> ---
Turns out you can trigger an oom with -Xmx900m with just three integer values:

BitSet bs = new BitSet();
bs.set(1794795584);
bs.set(1270275541);
bs.set(2127760244);

Any objections to: https://github.com/brettwooldridge/SparseBitSet

I've run a handful of speed/memory/accuracy tests and it _seems_ far better
than Java's BitSet.

If there are no objections, should we copy/paste the class or import another
dependency?

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