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