pike.git/ CHANGES

Branch: Tag:

2013-11-02

2013-11-02 16:00:36 by Per Hedbor <ph@opera.com>

More changes added to CHANGES

39:    | // ...    | }    - o Actually implemented the variant keyword. + o Implemented the variant keyword.    -  +  The keyward was present before, but did not actually do anything +  useful. +     This is used to do function overloading based on the argument types.       As an example:
98:    needed.      o The && operator changed, when doing A && B, and A is false, keep A -  instead of pushing 0. +  instead of returning 0.       This is especially useful then A is not actually 0, but an object    that evaluates to false, or UNDEFINED.
134:    | (["ID":(string)next_metric_id++,    | "NAME":stringify(name),    | "TYPE":type, -  | "AGGREGATE":aggregate, -  | "FORMAT":format, +  | "AGGREGATE":aggregate, +  | "FORMAT":format,    | "CODE":make_value_function(code), -  | ])); +  | ]));    | });      
175:       This fix changed the ordo of one of the tests that did that very    thing (binarytrees) from O(n^2) to O(n), and as such is more than a -  simple percentual speedup. +  simple percentual speedup in some cases, but it always improves the +  performance some since the base speed is also faster.      o Power-of-two hashtables are now used for most hashtables   
204:    The same thing happens when clearing values on the stack.      o string(x..y) (constant) types -  | > typeof("foo"); -  | (1) Result: string(102..111) -  also used to optimize lower_case/upper_case search and -  string_has_null etc. +        The strings now keep track of the min/max values in addition to two    new flags: all-uppercase and all-lowercase.    -  +  | > typeof("foo"); +  | (1) Result: string(102..111) +  +  This is used to optimize certain operations, +  lower_case, upper_case, search and string_has_null for now. +  It could be added to other places in the future as well. +     The fairly common case where you are doing lower_case or upper_case    on an already lower or uppercase strings is now significantly    faster.
221:    + lower_apply, changes to apply in general    Taken together these individuallt small optimizations speeds up at    least pike -x benchmark more than 5%. -  +     + A lot of opcodes implemented in machinecode for x86-64    This speed up the loop benchmarks close to a factor of 3. But then    again, most real code is nothing like that benchmark. -  +     + Several new opcodes added    As an example an observation was that most branch_if_zero is    followed by an is_eq, is_lt or is_gt or similar. Those opcodes -  always return 1 or 0. -  -  So, two new opcodes, fast_branch_if_zero and -  fast_branch_if_non_zero were added that map directly to three +  always return 1 or 0. So, two new opcodes, quick_branch_if_zero +  and quick_branch_if_non_zero were added that map directly to three    x86-64 opcodes, there is no need to check the types, do a real    pop_stack etc.   
240:    + Also siphash24 was added and is used in case the string hash table    becomes inefficient    + Removed features and modules + ----------------------------    - Deprecated features and modules - ------------------------------- -  +    o Removed facets    The optional (and not enabled by default) support for facet classes    has been removed, since it was only partially done and not really
412:    The new method addat() allows for writing into the buffer at any    position.    + o SDL.Music added to SDL. +  +  Allows the playback of audio/music files. +  Requires the SDL_mixed library. +    o System.TM -  +     Low-level wrapper for struct tm.       This can be used to do (very) simple calendar operations. It is,
420:    GMT, and does mirror functionality already available in gmtime()    and localtime() and friends, but in a (perhaps) easier to use API.    + o decode_value now throws the error object Error.DecodeError.    - --- UNSORTED +  Useful to catch format errors in the decode string.    - o SDL.Music added to SDL. -  Allows the playback of audio/music files. -  Requires the SDL_mixed library. + o Process.daemon    - o decode_value now throws the error object Error.DecodeError. -  Useful to catch format errors in the decode string. +  The daemon() function is for programs wishing to detach themselves +  from the controlling terminal and run in the background as system +  daemons.      o Debug.pp_object_usage() -  Pretty print debug information, useful to get debug information +  +  Pretty-print debug information, useful to get debug information    about object counts and memory usage in pike applications.       Uses the new _object_size lfun, if present in objects, to account
467:    -- inherit the program returned by calling master()->resolve() on    the specified identifier. Useful to inherit code written in pike.    - o sprintf("%H") and sscanf("%H") (new) sscanf("%n") (now documented, existed before (%!<X> modifier, used by optimizer)) -  +    o Image.JPEG.exif_decode    - o Process.daemon -  The daemon() function is for programs wishing to detach themselves -  from the controlling terminal and run in the background as system -  daemons. + o Crypto.PGP +  Added support for SHA256, SHA384 and SHA512 as hash functions. +  Expose the used hash and key types in the out data    - o Crypto.PGP - support more hash functions. -  +    o String.levenshtein_distance()    That function calculates the Levenshtein distance between two    strings. The Levenshtein distance describes the minimum number of
488:    matches for a short string in many longer texts, when a small    number of differences is expected.    - o Unicode databases updated to 6.2.0 + o System.sync() +  Synchronizes the filesystem on systems where this is possible +  (currently windows and unix-like systems).    -  + o System.getloadavg() +  Return the current load average. +  + o Unicode databases updated to 6.2.0   o Timezone databases updated to tzdata2013d    - o System.sync() - o System.getloadavg() +    o Stdio.File()->send/receive[_fd]   o The Search module has seen several fixes   o Standalone tools added: