Fascinating. Evading the Java GC by reimplementing a slab allocator, basically

'a probabilistic data structure conceptually similar to a Bloom filter, but with a more compact in-memory representation, and a slower query time.' could come in handy

hmm, I never knew about oom_adj, useful (via Peter Blair)

A high-performance compressor optimized for binary data -- 'designed to transmit data to the processor cache faster than a traditional, non-compressed, direct memory fetch via memcpy()' (via Bill de hOra)

very interesting; modern multicore x86 architectures use a NUMA memory architecture, which can cause a dip into swap, even when there appears to be plenty of free RAM available

interesting thoughts from Kragen

'SoftReferences are the cheap, crappy caching mechanism [...] perfect for when you'd like your cache to be cleared at random times and in random order.'