2 - Hack: System user attributes will be prefixed with __, notably <<Override>> renamed to <<__Override>>
3 - Hack: Support for 'abstract final' non-instantiable non-inheritable "utility" classes
6 - Use vasm virtual registers in x64 backend, transition fully to vasm-xls
7 - 'arraykey' scalar typehint that accepts both ints and strings
8 - Add OSS benchmarking suite
10 - [resumable] Set resumed flag before suspending VarEnv
11 - Objprof for HHVM (Approx. instance counter)
12 - Make RUSAGE_THREAD available to getrusage PHP function
13 - clean up /tmp/test-run- files
14 - VASM register-coalescing via hinting
15 - Be more conservative about HNI types when there are InterceptableFunctions
16 - Add runtime support for null-safe method call operator "?->"
17 - Add sanity test system to OSS benchmarker
18 - Fix double deallocation of object in zend conversion of object to string
19 - [hhvm|memoize] Makes <<__Memoize>> work with arbitrary args
20 - Use raw troff encoding for official HHVM man page
21 - Add --php options to HHVM man page
22 - Fix GMP tests/crashes
23 - Implement posix_errno
24 - Xdebug remote debugging compatibility and bug fixes
25 - Add options parameter to DOMDocument::load/loadHTML()
26 - Add support for GNU tar symlinks to PharData
27 - Add max_file_uploads support
28 - Improve process error checking in perf runner
29 - posix_getgrgid()['members'] should be empty array if no users found
30 - Convert from jemalloc's obsolete *allocm() to *allocx()
31 - Use EqX instead of Eq for Obj/Num comparisons.
32 - make class closure consist with PHP
33 - Fix guard relaxation to work with bytecode control flow
34 - Allow vm-stack flushing in rpc threads
35 - stop killing LightProcesses while writing out stacktrace.log
36 - Get hhvm compiling with clang-3.5
37 - Update .hhi files for ConstSet, Set, and ImmSet
38 - Force the linker to keep symbols in lowmem on MacOSX
39 - Make guard relaxation work with unreachable code
40 - Add minimal hdf support to test runner
41 - Analyze/optimize pseudomains in hhbbc
42 - [hhvm|memoize] Fix segfault on certain memoized functions
43 - Support mappy ini configuration
44 - Xdebug cleanup and trivial features
45 - Abort the server if a request gets stuck
46 - Added support for Closure::bind()
48 "Snoop Dogg" 11-Sep-2014
49 - VASM phase 1: emit vasm instructions, with existing register allocation
51 - [hack] Implement async lambdas.
52 - add process memory and code segment size to admin memory page
53 - Overhauled xdebug remote debugging testing
54 - Add a mechanism for building and testing a zend extension as a DSO.
55 - Support fast object allocation path when Eval.EnableObjDestruct call is on
56 - Static string table memory usage
57 - Implement parallel repo preloading.
58 - Add mcrypt constants to hhi
59 - Move var_dump() to HNI, kill off variable.idl.json
60 - JIT: Use std, boost, and folly instead of smart containers.
61 - Hack: Support for variance (+/-) annotations on type-parameters
62 - Implement APCIterator
63 - Convert v?s?printf() to HNI using Variadics
64 - Enable variadics for HNI functions/methods
65 - Smooth a wrinkle in HHVM's safesort impl
66 - Make Set implement KeyedIterable and support bracket syntax for reading
70 - Make MemExceeded flag sticky
71 - Check for OOM during json decoding
72 - Check surprise flags when unserializing arrays and objects
73 - Limit curl timeout to remaining request timeout
74 - Add variant of openssl_pkcs7_verify that ignores cert expiration
75 - Numerous changes to support xdebug
76 - Remove use of non-threadsafe strtok()
77 - Numerous changes to normalize INI setting names
78 - update to new sqlite
79 - <<__Memoize>> support
80 - Hack: Print backtrace when worker dies
81 - Parser support for "varray(..)"
82 - Introduce kVPackedKind for vector-like arrays
83 - Move mailparse to HNI
84 - VASM start phase 1; emit vasm for some instructions
85 - Fix in headers defines for cygwin
86 - [hack] Parser: Fix decl mode's confusion of type hints and xhp.
87 - Create a unified stack for Xenon
88 - Move debugger from IDL to HNI
89 - Fix mcrypt_create_iv(..., MCRYPT_RAND) to auto-seed RNG
90 - Fix information leak in hash_equals() implementation
91 - don't statically link libgcc/libstdc++ by default on OSX
92 - Adds ssdeep module to HHVM
93 - added new raise_error family functions that skip the top frame of the backtrace.
94 - Add initial support for -d outside of --php mode
95 - Fix covariance for Const{Vector,Map,Set}, add tests
97 - Implement SplDoublyLinkedList::add
98 - Link against LLVM library if present.
99 - Disallow multiple 'default:' blocks in a single switch
100 - Introduce async function lambdas
101 - Document the PHP profilers
102 - Fix sample profiler output; make it more efficient
103 - Properly shut down fastcgi worker threads when connection is closed
104 - Delete SimpleProfiler
105 - Create HHVM man page
106 - Improved PHP compatibility in the reflection API.
108 "Queen Latifah" 14-Aug-2014
109 - Implement RecursiveCallbackFilterIterator
110 - cmake installations should no longer put files in hphp and now put them in hhvm
111 - Fix error for (Recursive)CachingIterator::ctor's param 1
112 - Force OOM check on large smart allocations
113 - Support stream wrappers in XML parser extensions, add external entity loader
114 - Fix LowPtr load in codegen
115 - Fix race condition in DebuggerProxy start/stop
116 - Log per request if oom or timeout triggered in dynostats
117 - Break out hhvm request timeout / memout counters for psp vs non-psp
118 - Support collections for third parameter of preg_replace() and friends
119 - Added functions imagewebp and imagecreatefromwebp
120 - Fix mb_convert_case when encoding set other than default
121 - Added function imagepalettecopy to ext_gd
122 - Remove reflection hacks for primitive typehints
123 - Fixed tempnam() creates paths with '//'
124 - Add LibGMP extension
125 - Fix heap overflow in sql_regcase() for input >1GB
126 - Add HHVM hookups for folly::Singleton
127 - Fix isset on classes extending ArrayObject
128 - Only track live objects that actually have destructors
129 - Specify ssl cipher list for curl with OpenSSL only
130 - Remove support for "service threads"
131 - PDO MySQL's getCode() didn't match errorInfo
132 - Run usercode before ending the request
133 - Make DynamicExtensions work in ini
134 - Provide backup utf8 sanitizer when UConverter is unavailable
135 - Pass duplicate flag to SNI Initial Handler Callback
136 - fb_intercept now accounts for variadic functions
137 - Add variadic function to fb_intercept test
138 - Implemented basic xdebug tracing
139 - Rename snappy methods
140 - Add sort_flags to ArrayObject::asort
141 - Changed CRYPT_BLOWFISH to 1 because apparently it is available
142 - Convert ext/mysql to HNI
143 - Add log when memory usage reached the MaxRSS
144 - Fix http headers parsing + Remove unused code + Fix indentation
145 - Fixed error output for json_encode
146 - Corrected the var_dump output for Exception class
147 - Relax restrictions on the typing of class constant shape field names.
148 - Fix file:// URL decoding in libxml functions and elsewhere
150 "Public Enemy" 31-July-2014
151 - Interface requirements (similar to trait requirements) enforced
152 - Initial support for PHP5.6 argument unpacking: f($x, $y, ...$args)
153 - Hack: hhi files are embedded in the hh_server binary
154 - removed trampolines and the Eval.JitTrampolines option
155 - Hack: improved support for Generators, including async generators
156 - Documentation of PHP-level profiling in doc/profiling.md
157 - Cleanup of PHP-level profilers
158 - Change default for Eval.EnableObjDestructCall to true
159 - Bundle PCRE 8.32 with open-source HHVM, so we can use the JIT
161 "Outkast" 17-July-2014
162 - PHP_VERSION is now 5.6
163 - Introduce Dbl specific relational IR opcodes
164 - Expose APC info to admin port
165 - Improve Zend compatibility in the reflection API
166 - Implement xdebug_call_class
167 - Hack: first version of formatter
168 - Convert ext/xsl to HNI
169 - Hack: improve init time
170 - Remove JIT::RuntimeType
171 - Fix floating-point overflow for binary, octal and hex literals
172 - Collections: Vector::addAllKeysOf
173 - Hack can build on OSX now
174 - Fix await/yield operator precedence
175 - Fix various xcontroller issues
176 - Enable HHIRBytecodeControlFlow by default
177 - Various changes/fixes to WholeCFG region selector
178 - Introduce async generators
180 - Fix Memcache::get($keys) when $keys is an array
181 - Implement xdebug_call_function
182 - Change order of wait handle processing from FIFO to LIFO
183 - Add Redis::_serialize()
185 "Notorious B.I.G." 25-Jun-2014
186 - Remove Translator::analyze (replaced by tracelet region selector)
187 - Allow empty keys in hash_hmac() and hash_hmac_file()
188 - Interface requirements supported in parser
189 - Implement xdebug_{peak_,}memory_usage
190 - Inline singleton-pattern functions
191 - Cleanup in PhpFile and FileRepository
192 - Fix mysqli_query return value for query without result
193 - Implement xdebug_call_file
194 - Add fastlz support to memcached extension
195 - Fix ini_get to return false for non-supported settings
196 - Fix PHP version constants
197 - All numeric comparisons involving NAN, except != and !==, are now false.
198 - Implement xdebug_call_line
200 - Remove dump-file-repo admin command
201 - Fix stdclass promotion of static private properties
202 - Remove unused locals in global dce (HHBBC)
203 - Get mockery at 100%
204 - Fix casting resource to object
205 - Relocate code to arbitrary alignment
206 - Always let the first character through for camelcase searching
207 - Implement xdebug configuration options
208 - Convert ext/memcache to HNI
209 - Match php5's memcache getoption
210 - ./configure --help now has all the options
211 - mysqli: return false on non-selects
212 - Don't include bt_handler or killpg in backtraces
213 - Don't buffer overrun on bad DNS TXT records
214 - Fixed property access to DOM and XMLReader classes
215 - Add support for ParamCoerceModeFalse
217 "Mos Def" 11-Jun-2014
218 - Turn on new tracelet region selector by default; analyze() is deprecated
219 - Fix a bug in debugBacktrace with NativeImpl methods
220 - Request local allocator now uses logarithmically spaced size classes
221 - Improvements to JIT'd FCallBuiltin to cause fewer spills
222 - Enable vtable-style dispatch on methods marked "abstract"
223 - JIT several instructions that were being punted: Unbox, File, Dir
224 - Increase "hinted drop" time on write lease, improving JIT'd code layout
225 - Implemented __toString functions in reflection classes
226 - Several tc-print bug fixes
227 - Some improvements in hhbbc arithmetic type inference
228 - More service requests are "ephemeral", reducing wasted stubs space
229 - HH\Vector now has a packed array internally, for O(1) conversions to array
230 - current() and key() now support expressions that can't be taken by reference
231 - Fix a long-standing but very rare race condition with Closure class names
232 - gcc 4.8 is the new minimum to build
233 - Various bug/compat fixes in Soap, SimpleXML, ArrayObject, DOMNode, mysqli
234 - Add a scheme to extend support for efficient packed arrays w/ cap up to 2^32
235 - Move vmfp, vmsp, and vmpc into RDS
236 - Fix some hard-to-hit bugs in inlining relating to stack overflow checks
237 - Faster int to double conversion when calling builtins from the JIT
238 - Fix ReflectionParameter::getClass for scalar typehints
239 - better tuning of the PGO 'hot function' threshold
240 - performance improvements to calling native class methods
241 - improve performance of async functions that exit via exception
242 - several bug fixes in refcount optimization pass relating to async functions
243 - More hhir-related docs in the hackers-guide
244 - Initial support for relocating generated machine code
245 - JIT optimizations for count()
246 - Corrected the result of var_dump and print_r for ArrayObject
247 - fix HH\autoload_set_paths with nested maps
248 - make ReflectionClass serializable
249 - ext/standard/output HNI conversion
250 - allow usage of zend-qsort in user sorts with a runtime option
252 "LL Cool J" 28-May-2014
253 - Over 200 other bug fixes (go lockdown!)
254 - Every HDF setting is now available as INI
255 - Cut session_id() size by 1/2
256 - Added 'Z' format string for pack/unpack
257 - We now build on clang
258 - Fix pcre cache to not fatal when full
259 - Implement $php_errormsg
260 - Adding -n CLI option to hhvm php mode
261 - Fix substitution of invalid UTF8 sequences in htmlspecialchars
262 - FastCGI: Use SCRIPT_FILENAME as the PHP script to run
263 - Can create DateTimeZone's from abbreviations
264 - Put all fastcgi params into $_SERVER
265 - Many DOM classes are now serializable
266 - Define the xhp tokens
267 - Many reflection changes for perf and compatibility
268 - Default fastcgi to listen on 127.0.0.1
269 - remove register_cleanup_function
271 - Set: retain(), reserve(), addAllKeysOf()
272 - {Set|ImmSet|Vector|ImmVector}::fromKeysOf()
275 - Backport fix for CVE-2011-2202
276 - Interfaces {Keyed}Container match arrays *and* collections, not iterables
277 - Added ** and **= operators to HHVM and more compatibility fixes with PHP5.6
278 - Fixes and improvements to collections
279 - Replace json decoder with json-c library
280 - Document VMRegAnchor and isVMFrame()
281 - Improvements to array iterator code
282 - Improvements to the type checker
283 - Allow parser to be generated with bison 3
284 - Improvements and speed up to reflection code
287 - Make handling of code.hot overflows more robust
288 - Catch server errors sooner
289 - Fix segfault and infinite recursion in fileinfo extension
290 - Resolve systemlib constants at compile time
291 - Resume resumables natively
292 - Import round() table optimizations from php-src
293 - Delete bytecode Peephole optimizer
294 - Remove most of annotation.cpp, and some other code gated on !UsedHHBBC
295 - Create phis for locals
296 - Fix free of "" in rfc1867PostHandler
297 - Add firstValue(), firstKey(), lastValue(), lastKey() to collections
298 - Add concat() to collections
299 - Clarify Hack license
300 - Add CakePHP3 to test runner
301 - Better error when TC is full
302 - Add hash_equals() from PHP 5.6
304 "Insane Poetry" 24-Apr-2014
305 - Support for PHP 5.6 variadic ...$args syntax for func declarations
306 - Open source HHMeasure, a simple and extensible microbenchmarking tool
307 - Added a new time-based sampling profiler (Project Xenon)
308 - Fix PCRE unicode handling
309 - Convert Zend compatibility layer and various extensions to HNI
310 - Encode execution mode (eager or resumed) into SrcKey
311 - Merge eager and resumed parts of async functions
312 - Rework various async / continuation bytecode instructions
314 "House of PHPain" 1-Apr-2014
315 - Allow direct arg passing with up to 15 params (7 if at least one is a double)
317 "Ghostface Killah" 17-Mar-2014
318 - Remove "HipHop" from error messages
319 - Add __IsFoldable user attribute for const-foldable functions
320 - Add __Native("NoFCallBuiltin") UA for builtins which need an actrec
321 - Add support for testing different outputs in repo mode
322 - Implement remaining functionality from intl extension
323 - Implement XSL extension
324 - Implement Stream Filters
325 - Improve php.ini support and get ready to kill HDF files
326 - Parse config files as ini files, unless filename contains '.hdf'
327 - Various fixes to Redis, JSON, SPL, DateTime, MySQLi, and others
328 - Remove C<T>Ref typedefs (use const T& now)
329 - JIT default on in command line mode
330 - gethostname() just returns what the syscall returns (Zend compat)
331 - HHBBC turned on in the build for facebook.com
333 "Fifty Cent" 3-Mar-2014
334 - Array parameter type constraints implicitly cast collections to arrays
335 - Fix issues with feof and fwrite
336 - Fix issues with sleep and inaccessible properties
337 - Dump a jemalloc pprod dump when a request hits OOM
338 - Make method_exists work with interface inheritance
339 - Fix crash in preg_replace with /e
340 - Support filename and content type in Curl uploads
342 - Handle relative paths in is_dir
343 - Add string conversion for array_fill_keys
344 - Implement various Imagick functionality
345 - Implement CUROPT_PROGRESSFUNCTION
346 - Implement PHP 5.6 __debugInfo() magic method
347 - Raise warnings when return type annotations mismatch
348 - Fix nested ArrayObject assignment
349 - Switch many ini settings to thread-time binding
350 - Clean up memory stat tracking
351 - Immutable collections are now prefixed with Imm instead of Fixed/Frozen
352 - Clean up type parameter for CheckType-related IR opcodes
353 - Remove legacy linear-scan register allocator and Eval.HHIRXls option
356 - reenabled jemalloc tcache flush for idle threads
357 - array_combine now performs __toString conversion on objects in $keys
358 - Allow streams in move_uploaded_file
359 - Fix a bug double closing a UserFile
360 - Warn when first arg to call_user_func is an object with no __invoke
361 - kill userland hdf functions
362 - Final method reports itself as final
363 - Implement IntlCalendar
364 - Disallow create_function in RepoAuthoritative mode
365 - Case-insensitive check for Accept-Encoding: gzip
367 "Donald Glover" 3-Feb-2014
368 - Support for "::class"
369 - Enable FCallBuiltin for HNI functions
370 - json_decode parity with PHP 5.4
371 - Fix race condition with profiling vs. non-profiling functions prologues
372 - Implement ini_get_all()
373 - Begin conversion of runtime options to INI
374 - Fix potential PGO-mode crash
375 - Fixes and enhancement in IR printing
376 - Vector and Set now supported by:
377 array_{shift,unshift,fill_keys,reverse,flip,size,chunk}, min, and max
378 - StableMap is now an alias for Map, which retains insertion order
379 - Map moved to HH namespace
380 - Fixes in XLS spilling of SIMD registers
381 - Support SCRIPT_FILENAME in FastCGI
382 - Implement stream_context_{get,set}_default
383 - Support for Intel VTune Amplifier XE
384 - Rewrite of SimpleXML
385 - Several HNI conversions, and a helper script
386 - Move Pair to HH namespace
387 - Fix get_included_files ordering
388 - Fix $_SERVER and $_ENV in FastCGI
389 - Update timelib to php 5.5.8
390 - Some dead code removal
394 - FastCGI fixes, perf improvements
395 - ext_zend_compat fixes
396 - Turn on XLS Register Allocator by default
397 - Fix server stats reporting
398 - 'num' scalar typehint that accepts both ints and floats
399 - fix support for typedef'd namespaces
400 - don't swallow fatals when autoloading
401 - Map collections learned the in-place retain() and retainWithKey()
402 - rename Set::difference() to Set::removeAll()
403 - Update Set to retain element insertion order
406 - FrozenMap collection
407 - Deprecated Vector|Set|Map::put() method removed
408 - == between Frozen{Vector|Set|Map} and {Vector|Set|Map} now can return true
410 "Beastie Boys" 6-Jan-2014
411 - Support lex-time binary constants (eg. 0b10111)
412 - StreamWrappers now support rmdir, mkdir, rename and unlink
413 - Miscellaneous PHP5 compatibility fixes
414 - Default StatCache to off
415 - Miscellaneous FastCGI fixes
416 - Miscellaneous region compiler fixes
417 - Map and StableMap collections use the same underlying implementation
418 - Trait requirements enforced
419 - hhprof performance improvements
420 - Add array to string conversion notice
421 - Add RaiseNotice IR opcode
422 - Fix VirtualHost.<name>.Pattern matching
423 - Fix various memory leaks (pdo_parse_params, Gen*WaitHandle)
424 - Import a lot more Zend tests that used to crash or hang
426 - XLS register allocation cleanup
427 - Enable region compiler by default for JIT functions in ahot
428 - Fatal on eval() in RepoAuthoritative mode
429 - Enable LTO for HHVM
430 - Fix a few SPL compatibility issues
432 "Appleseed" 23-Dec-2013
433 - Fix issues with DOCUMENT_ROOT in fastcgi
434 - Better type inference for collections and builtins in repo mode
435 - Shorter syntax for lambda expressions w/ automatic captures
436 - Parser support for trait require clauses
437 - Move FrozenVector and Set to the HH namespace
438 - Fix resource to array conversion
439 - Fix a request local memory leak in foreach of apc arrays
440 - Initial php_odbc API implementation
441 - Implement PHP's hash_copy() function
442 - Experimental tool: Memoization Opportunity Profiler
443 - Various small parity/behavior fixes (in phar, proc_open, filter_var)
444 - A Eval.DumpHhas=1 option to dump hhas for a php file
445 - Better warnings in Set::toArray
446 - Fix the behavior of foreach loops in finally blocks
447 - chmod -x runtime/vm/jit/*.{cpp,h}
448 - Changes to make hhvm build clean with clang-3.4
449 - Fix array_product to not be bug-compatible with PHP 5.2
450 - Change the Map datastructure---preserves order and does faster foreach
451 - FrozenSet collection
452 - Generate pid.map when we unmap text section, for the perf tool
453 - Implemented GlobIterator
454 - Implemented Reflection::export and Reflection::getModifierNames
457 - support date.timezone in ini files
459 - special comparisons for DateTime
460 - delete unimplemented functions
461 - support for the finally clause in try blocks
463 "Huarache" 26-Nov-2013
464 - Linker re-ordering of hot functions
465 - Huge pages for hot functions
466 - Implement ZipArchive
467 - preg_replace /e support
468 - get_mem_usage() no longer can be negative
469 - Userland file system support
470 - Implement fileinfo extension
472 - PDO::sqliteCreateFunction()
473 - Implement NumberFormatter
475 - Implement DatePeriod
476 - Many reflection fixes
478 - A ton of performance fixes
479 - A ton of open source framework fixes
480 - FastCGI Server Support
482 "Garlic Alfredo" 11-Nov-2013
483 - teach implode() about collections
484 - fix ini parsing leak
485 - Make array not an instanceof Traversable
487 "Burrito" 28-Oct-2013
488 - Initial support for using FastCGI
489 - Initial support for php.ini configuration files
490 - Log when a nullable (e.g. ?int) is incorrect
491 - Add support for collections to array_diff, array_diff_key, array_intersect,
493 - tc-print improvements and fixes
494 - Several debugger fixes
495 - More improvements to the experimental PHP extension compat layer
496 - Fixed how parse errors are handled by eval()
497 - Support custom reason for status header
498 - Emit better error message when hhvm's systemlib doesn't load properly
499 - Fixes / clarifications added to the bytecode specification
500 - Lots of other bug fixes, clean up, PHP compat fixes, and JIT improvements
502 "Sausage" 14-Oct-2013
503 - Direct invocation of callable arrays: $f = [$cls_or_obj, 'method']; $f()
505 - Support dynamically loadable extensions
506 - Support loading mini-systemlibs from extensions
508 "Tabasco" 30-Sep-2013
509 - Fix issues with __toString() functions that return non-string values
510 - Don't allow mock classes to extend collection classes
511 - Smarter memory allocation and scheduling for NUMA systems
512 - Improve profiler performance in the jit
513 - Fix several Zend compatibility issues
514 - Fix several bugs uncovered by ASAN
515 - Add collection support to array_keys, array_values, and array_combine
516 - Return a set-like array from Set::toArray
517 - Add to(Vector|Map|StableMap|Set) methods to collections
518 - Collections convert to boolean false when empty
519 - get_class_vars invokes the autoloader when necessary
520 - Rework the Zend compatibility layer to be more robust
521 - Allow traits to implement interfaces
522 - Support arbitrary expressions inside empty()
524 "Bobotie" 16-Sep-2013
525 - HNI (HipHop Native Interface) for calling C++ functions from PHP
526 - Fix PropertyAccessorMap::isset
527 - Expose more POSIX constants
528 - Fixed behavior of stream_get_contents when default args are used.
529 - Implement str_getcsv, and fix some fgetcsv related issues.
530 - [IPv6] Fix stream_socket_recvfrom & stream_socket_sendto.
531 - [IPv6] Fix socket_sentto_recvfrom_ipv6_udp Zend compatibility.
532 - Optimize closure invocation and __invoke (~3x faster to invoke)
533 - Import gettext extension
534 - string and object allocation optimizations (reduced memory usage for both)
535 - Import YAML extension
536 - Import ftp extension
539 - Fix order of custom attributes and visibility in ctor arg promotion
540 - Implement CachingIterator
541 - Implement RecursiveCachingIterator
542 - Generalized heuristic for choosing when to inline in the jit
543 - Introduced a Zend compatibility layer to compile extensions
544 - Imported calendar extension
545 - Use gcc-4.8.1 by default
546 - Improve hhvm command line parsing logic
547 - Fix register_shutdown in session_set_save_handler to match PHP 5.4
548 - Add "native" functions for use in Systemlib
549 - PHP extension source-compatitblility layer
550 - Fix ArrayIterator constructor PHP compatibility
551 - Enable building against libmemcached 1.0.8
552 - Debugger: $_ not cleared but still printed after exception
553 - Fix clone of SplPriorityQueue
554 - Debugger: Fix bugs when multiple threads hit the same breakpoint
555 - Fix several namespace bugs
556 - Several PHP compatibility fixes for ArrayObject and ArrayIterator
557 - Fix list assignment with collection literals
558 - support "tuple(...)" in initializer expressions
559 - HHVM should compile with libmemcached 1.0.9+
560 - Support "(new Vector {..})->method()" style syntax
561 - use trigger_error in PHP for Redis user errors
562 - multiple simplexml fixes
563 - fixed serialize/unserialize for SplObjectStorage
564 - Implement ReflectionParameter::IsCallable()
566 "Achiote" 19-Aug-2013
567 - Async stack traces in the debugger via the "wa" command
568 - Fix late static binding in static closures
569 - Fix breakpoints on generators
570 - Add SplObserver and SplSubject interfaces
571 - Update Iterable interface and add toArray() method
572 - Allow __get for undefined properties
573 - Implement get_included_files()
574 - Limit use of huge pages
576 "Churrasco" 05-Aug-2013
577 - Implement stream_is_local
578 - Implement read support for .phar
579 - Implement assert with string arguments
580 - Implement RecursiveArrayIterator
581 - Implement php_strip_whitespace()
582 - Support for timeouts in cli mode
583 - Closure allocation optimizations (~2x faster to allocate a closure)
584 - Implement Redis session handler
585 - New memory profiler, hhprof, with pprof compatible output
586 - Update isset($string[$k]) and empty($string[$k) to PHP 5.5 semantics
587 - Fixed a few parser bugs
588 - Fixed a few bugs with token_get_all()
589 - Fix (string)$obj semantics when __toString() is not defined
592 - Optimize vector-shaped Arrays (arrays with keys in range 0..size-1)
593 - Enable HHBC by default in debug builds
594 - Implement SplObjectStorage::getInfo()
595 - Initial rough draft of xhpast2, a replacement for xhpast
596 - fix compilation on Ubuntu 13.04
597 - OSX changes, next round
598 - Modify PHP's ext/standard/math/tests/(pow|abs).phpt to be HHVM friendly
599 - add XHP comment syntax based on http://www.w3.org/TR/REC-xml/#sec-comments
601 "Wasabi Peas" 08-Jul-2013
602 - always_assert when we run out of TC space
603 - Initial changes to get HHVM compiling on OSX
604 - Consolidate ObjectData and Instance
605 - Prototype heap tracing framework & Heap profiler
606 - Better JIT code generation for Mod and Div
607 - Fixes to enable compilation with clang
608 - Support for yield k => v
609 - Make HHVM's command line parsing closer to PHP
610 - Implement Redis extension
611 - Implement LimitIterator from SPL
612 - add SessionHandler from PHP 5.4
613 - Numerous Debugger fixes and new developer docs for Debugger
614 - Ported many extension tests to PHP