Is the swap feature useful?

Jason Evans jasone at
Mon Jan 16 19:04:08 PST 2012

Over the two years that jemalloc has had the swap feature (optionally 
compiled in if --enable-swap is specified to configure), I've received 
many general questions about the feature, but I have yet to hear of a 
single person actually using it in an application.  As such I'm 
considering removing the feature in jemalloc 3.0.0.  Does anyone find 
the feature sufficiently useful to warrant its continued existence?


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