2 - Fix issues with __toString() functions that return non-string values
3 - Don't allow mock classes to extend collection classes
4 - Smarter memory allocation and scheduling for NUMA systems
5 - Improve profiler performance in the jit
6 - Fix several Zend compatibility issues
7 - Fix several bugs uncovered by ASAN
8 - Add collection support to array_keys, array_values, and array_combine
9 - Return a set-like array from Set::toArray
10 - Add to(Vector|Map|StableMap|Set) methods to collections
11 - Collections convert to boolean false when empty
12 - get_class_vars invokes the autoloader when necessary
13 - Rework the Zend compatibility layer to be more robust
14 - Allow traits to implement interfaces
15 - Support arbitrary expressions inside empty()
18 - HNI (HipHop Native Interface) for calling C++ functions from Php
19 - Fix PropertyAccessorMap::isset
20 - Expose more POSIX constants
21 - Fixed behavior of stream_get_contents when default args are used.
22 - Implement str_getcsv, and fix some fgetcsv related issues.
23 - [IPv6] Fix stream_socket_recvfrom & stream_socket_sendto.
24 - [IPv6] Fix socket_sentto_recvfrom_ipv6_udp Zend compatibility.
25 - Optimize closure invocation and __invoke (~3x faster to invoke)
26 - Import gettext extension
27 - string and object allocation optimizations (reduced memory usage for both)
28 - Import YAML extension
29 - Import ftp extension
32 - Fix order of custom attributes and visibility in ctor arg promotion
33 - Implement CachingIterator
34 - Implement RecursiveCachingIterator
35 - Generalized heuristic for choosing when to inline in the jit
36 - Introduced a Zend compatibility layer to compile extensions
37 - Imported calendar extension
38 - Use gcc-4.8.1 by default
39 - Improve hhvm commandline parsing logic
40 - Fix register_shutdown in session_set_save_handler to match PHP 5.4
41 - Add "native" functions for use in Systemlib
42 - PHP extension source-compatitblility layer
43 - Fix ArrayIterator constructor PHP compatibility
44 - Enable building against libmemcached 1.0.8
45 - Debugger: $_ not cleared but still printed after exception
46 - Fix clone of SplPriorityQueue
47 - Debugger: Fix bugs when multiple threads hit the same breakpoint
48 - Fix several namespace bugs
49 - Several PHP compatibility fixes for ArrayObject and ArrayIterator
50 - Fix list assignment with collection literals
51 - support "tuple(...)" in initializer expressions
52 - HHVM should compile with libmemcached 1.0.9+
53 - Support "(new Vector {..})->method()" style syntax
54 - use trigger_error in PHP for Redis user errors
55 - multiple simplexml fixes
56 - fixed serialize/unserialize for SplObjectStorage
57 - Implement ReflectionParameter::IsCallable()
60 - Async stack traces in the debugger via the "wa" command
61 - Fix late static binding in static closures
62 - Fix breakpoints on generators
63 - Add SplObserver and SplSubject interfaces
64 - Update Iterable interface and add toArray() method
65 - Allow __get for undefined properties
66 - Implement get_included_files()
67 - Limit use of huge pages
69 "Churrasco" 05-Aug-2013
70 - Implement stream_is_local
71 - Implement read support for .phar
72 - Implement assert with string arguments
73 - Implement RecursiveArrayIterator
74 - Implement php_strip_whitespace()
75 - Support for timeouts in cli mode
76 - Closure allocation optimizations (~2x faster to allocate a closure)
77 - Implement Redis session handler
78 - New memory profiler, hhprof, with pprof compatible output
79 - Update isset($string[$k]) and empty($string[$k) to PHP 5.5 semantics
80 - Fixed a few parser bugs
81 - Fixed a few bugs with token_get_all()
82 - Fix (string)$obj semantics when __toString() is not defined
85 - Optimize vector-shaped Arrays (arrays with keys in range 0..size-1)
86 - Enable HHBC by default in debug builds
87 - Implement SplObjectStorage::getInfo()
88 - Initial rough draft of xhpast2, a replacement for xhpast
89 - fix compilation on Ubuntu 13.04
90 - OSX changes, next round
91 - Modify PHP's ext/standard/math/tests/(pow|abs).phpt to be HHVM friendly
92 - add XHP comment syntax based on http://www.w3.org/TR/REC-xml/#sec-comments
94 "Wasabi Peas" 08-Jul-2013
95 - always_assert when we run out of TC space
96 - Initial changes to get HHVM compiling on OSX
97 - Consolodate ObjectData and Instance
98 - Prototype heap tracing framework & Heap profiler
99 - Better JIT code generation for Mod and Div
100 - Fixes to enable compilation with clang
101 - Support for yield k => v
102 - Make HHVM's command line parsing closer to PHP
103 - Implement Redis extension
104 - Implement LimitIterator from SPL
105 - add SessionHandler from PHP 5.4
106 - Numerous Debugger fixes and new developer docs for Debugger
107 - Ported many extension tests to PHP