TODO

v 0.5
=====

* finish TODOs in the new memory manager
* use normal free list for large sizes?
* fewer small size classes?
* chunk coalescing
* split large memcache entries
* minimize memcache locks or non-blocking memcache table

;;; At this point it becomes ready to challenge stock memcached

v 0.6
=====

* enhance task sharing
* re-evaluate combiners
* cleanup and re-evaluate futures
* parallel polling mechanism
* ensure timer events are not starved by I/O
* ensure open sockets are orderly destroyed on shutdown
* support custom signal events
* cleanup net and netbuf interfaces
* enhance statistics
** net statistics
** ring statistics
** alloc statistics
** global lock counters
* UDP servers
* refine memcache module:
** statistics
** add UDP protocol support

Undetermined
============

Essentials:
* system call threads
* disk I/O threads
* syslog
* utf8 support for scan, json
* float/double support for format, scan, json
* SSL servers
* performance instrumentation

Larger items:
* NUMA support:
** NUMA-aware memory allocation
** NUMA-aware synchronization
** NUMA-aware work scheduling
* persistence
* replication
* HTTP module
* redis protocol
* arm aarch64 port
* extension language
* AF_PACKET and/or DPDK-based net I/O

Low priority enhancements:
* slab allocator?
* hires timers
* DNS resolver
* background workers
* fs event notification
* core and task local storage (tls)
* exit idle workers pending for too long
* reap dead tasks pending for too long
* adopt C11-compatible fences and atomics
* non-blocking log
* backoff and/or wait queue on ring full
* non-blocking pool growth
* shrink pools on low demand
* shrink memcache table on low demand
* generic work stealing
* proper future cancellation
** let tasks to be canceled across cores
** let catch task termination with setjmp/longjmp or libunwind mechanism
* try to detect clock adjustments and reset realtime timers accordingly
* failure trace records