SMA delete optimizations (backward block link structures) -shire
“atomic” operations: apc_inc, apc_dec, apc_cas (increment, decrement, compare and swap). -shire
APCIterator class for smoother iterations over large caches with deletion support. -shire
upload progress does in-place updates - gopal
apc_fetch should exit without locking when cache expunge is in progress - gopal
MD5 sums on file entries (disabled by default, only make sense on stat=0). -shire
File deletion by regex, array, iterator -sklar / shire
Compiler chaining for optimizer/bcompile/xdebug/vld/phar/etc (I'd be willing to write this if need be and would love to see this make it into 3.1.0 if possible) -Graham