Caching is all about performance, so I carefully track Dalli performance to ensure no regressions. Times are from a Unibody MBP 2.4Ghz Core 2 Duo running Snow Leopard.
Testing 1.8.5 with ruby 1.9.2p0 (2010-08-18 revision 29036) [x86_64-darwin10.4.0]
user system total real
set:plain:memcache-client 2.070000 0.590000 2.660000 ( 2.669744)
set:ruby:memcache-client 2.150000 0.570000 2.720000 ( 2.734616)
get:plain:memcache-client 2.240000 0.400000 2.640000 ( 2.675747)
get:ruby:memcache-client 2.290000 0.380000 2.670000 ( 2.682108)
multiget:ruby:memcache-client 1.030000 0.140000 1.170000 ( 1.174503)
missing:ruby:memcache-client 1.900000 0.370000 2.270000 ( 2.282264)
mixed:ruby:memcache-client 4.430000 0.950000 5.380000 ( 5.420251)
Testing 0.9.0 with ruby 1.9.2p0 (2010-08-18 revision 29036) [x86_64-darwin10.4.0]
user system total real
set:plain:dalli 1.610000 0.360000 1.970000 ( 2.032947)
set:ruby:dalli 1.690000 0.360000 2.050000 ( 2.108120)
get:plain:dalli 1.710000 0.400000 2.110000 ( 2.123895)
get:ruby:dalli 1.760000 0.390000 2.150000 ( 2.170964)
multiget:ruby:dalli 0.950000 0.310000 1.260000 ( 1.269679)
missing:ruby:dalli 1.650000 0.380000 2.030000 ( 2.054383)
mixed:ruby:dalli 3.470000 0.750000 4.220000 ( 4.323265)