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Modification History:
*** NOTE ***
DO NOT UPDATE THIS FILE. UPDATE package.xml INSTEAD.
This file contains the CHANGELOG for the initial release. For subsequent
releases, the CHANGLELOG is maintained in the package.xml file itself.
Please edit package.xml instead.
************
03/02/2008 kannan, checkin xhprof_html/ and xhprof_lib/ directories.
cjiang [These contain PHP sources for the UI as well
as various supporting libraries to compute
"flat" info, diff reports, aggregate results
of multiple runs, typeahead support, etc.]
02/20/2008 kannan add basic sanity tests for the extension
02/19/2008 kannan register constants for optional profiler flags;
add xhprof.output_dir ini setting.
01/22/2008 ps port cpu affinity functions to FreeBSD
01/15/2008 kannan intercept builtins even if zend_execute_internal
were null to begin with
01/14/2008 kannan track builtins by default;
fix compiler warnings with fwd decls
12/22/2008 cjiang Further refactoring of the code for open sourcing:
(1). Remove level 1 profiling mode.
(2). Add xhprof_sample_enable, xhprof_sample_disable.
(3). Unifiy function and global variable prefix.
(4). Group relevant functions together.
(5). Migrate change history to CHANAGELOG file.
12/19/2008 kannan First step refactoring for open sourcing:
(1). Put basic direcotry structure
(2). Rename extension and function names
(3). Add LICENCE header.
06/17/2008 veeve use cycle_timer() for XHPROF_MODE_SAMPLED
03/27/2008 cjiang Add a 'hash-based' filter to reduce the number
of expensive call-stack tranversal on recursion
detection.
03/17/2008 kannan must not keep state on C stack to handle
exit (which causes _zend_bailout to longjmp
02/25/2008 kannan add xhprof_flags to toggle various metric
collections (buitins on/off, cpu metric on/off
memory stats on/off)
02/14/2008 cjiang Use cycle_timer based on 'rdtsc' instruction
on x86 machines to replace gettimeofday. rdtsc
is extremely cheap compared with gettimeofday
or getrusage.
12/06/2007 veeve bump version 1.1.2,
added hp_global_t
added mode callbacks, made modes extensible
added sampler mode
12/05/2007 veeve added doc; house cleaning
11/28/2007 kannan split include accounting into load/run_init
11/09/2007 kannan memory usage profiling
10/27/2007 kannan handle recursive calls, "include" operations
10/20/2007 kannan add hierarchical profiling; incl vs. exclusive
function times; browser based UI; diff and
aggregation support
10/10/2007 hzhao creation (flat function profiles)
Authors:
Haiping Zhao hzhao@facebook.com
Kannan Muthukkaruppan kannan@facebook.com
Venkat Venkataramani veeve@facebook.com
Changhao Jiang cjiang@facebook.com