1999 Jan 8

 Ilya Zakharevich:
  Newer perls: Add PERL_POLLUTE and dTHR.

1998 Nov 10 
This version of DProf should work with older Perls too, but to get
full benefits some patches to 5.004_55 are needed.  Patches take effect 
after new version of Perl is installed, and DProf recompiled.

Without these patches the overhead of DProf is too big, thus the statistic
may be very skewed.

Oct 98:
 Ilya Zakharevich:
  DProf.xs
    - correct defstash to PL_defstash
    - nonlocal exits work
  dprofpp
    - nonlocal exits work
  DProf.pm
    - documentation updated
  t/test6.*
    - added

Nov-Dec 97:
 Jason E. Holt and Ilya Zakharevich:
  DProf.xs
    - will not wait until completion to write the output, size of buffer
      regulated by PERL_DPROF_BUFFER, default 2**14 words;

 Ilya Zakharevich:
  dprofpp
    - smarter in fixing garbled profiles;
    - subtracts DProf output overhead, and suggested profiler overhead;
    - new options -A, -R, -g subroutine, -S;
    - handles 'goto' too;
  DProf.xs
    - 7x denser output (time separated from name, ids for subs);
    - outputs report-write overhead;
    - optional higher-resolution (currently OS/2 only, cannot grok VMS code);
    - outputs suggested profiler overhead;
    - handles 'goto' too;
    - handles PERL_DPROF_TICKS (on OS/2, VMS may be easily modified too)

Jun 14, 97 andreas koenig adds the compatibility notes to the README
and lets the Makefile.PL die on $] < 5.004.

Jun 06, 97 andreas koenig applies a patch by gurusamy sarathy because
Dean is not available for comments at that time. The patch is available
from CPAN in the authors/id/GSAR directory for inspection.

Sep 30, 96 dmr
  DProf.xs
  - added Ilya's patches to fix "&bar as &bar(@_)" bug.  This also fixes
    the coredumps people have seen when using this with 5.003+.
  DProf.pm
  - updated manpage
  t/bug.t
  - moved to test5
  Makefile.PL
  - remove special case for bug.t

Jun 26, 96 dmr
  dprofpp.PL
  - smarter r.e. to find VERSION in Makefile (for MM5.27).
  DProf.pm
  - updated manpage
  DProf.xs
  - keep pid of profiled process, if process forks then only the
    parent is profiled.  Added test4 for this.

Mar 2, 96 dmr
  README
  - updated
  dprofpp
  - updated manpage, point to DProf for raw profile description.
  DProf.pm
  - update manpage, update raw profile description with XS_VERSION.
  - update manpage for AUTOLOAD changes.
  DProf.xs
  - smart handling of &AUTOLOAD--looks in $AUTOLOAD for the sub name.
      this fixes one problem with corrupt profiles.

Feb 5, 96 dmr 
  dprofpp
  - updated manpage
  - added -E/-I for exclusive/inclusive times
  - added DPROFPP_OPTS -- lazily
  - added -p/-Q for profile-then-analyze
  - added version check
  dprofpp.PL
  - pull dprofpp's version id from the makefile
  DProf.pm
  - added version to bootstrap
  - updated doc
  - updated doc, DProf and -w are now friendly to each other
  DProf.xs
  - using savepv
  - added Tim's patch to check for DBsub, avoids -MDevel::DProf coredump
  - turn off warnings during newXS("DB::sub")
  tests
  - added Tim's patch to ignore Loader::import in results
  - added Tim's patch to aid readability of test?.v output


-- from those days when I kept a unique changelog for each module --

# Devel::DProf - a Perl code profiler
#  31oct95
#
# changes/bugs fixed since 5apr95 version -dmr:
#  -added VMS patches from CharlesB.
#  -now open ./tmon.out in BOOT.
# changes/bugs fixed since 2apr95 version -dmr:
#  -now mallocing an extra byte for the \0 :)
# changes/bugs fixed since 01mar95 version -dmr:
#  -stringified code ref is used for name of anonymous sub.
#  -include stash name with stringified code ref.
#  -use perl.c's DBsingle and DBsub.
#  -now using croak() and warn().
#  -print "timer is on" before turning timer on.
#  -use safefree() instead of free().
#  -rely on PM to provide full path name to tmon.out.
#  -print errno if unable to write tmon.out.
# changes/bugs fixed since 03feb95 version -dmr:
#  -comments
# changes/bugs fixed since 31dec94 version -dmr:
#  -added patches from AndyD.
#

# Devel::DProf - a Perl code profiler
#  31oct95
#
# changes/bugs fixed since 05apr95 version -dmr:
#  - VMS-related prob; now let tmon.out name be handled in XS.
# changes/bugs fixed since 01mar95 version -dmr:
#  - record $pwd and build pathname for tmon.out
# changes/bugs fixed since 03feb95 version -dmr:
#  - fixed some doc bugs
#  - added require 5.000
#  - added -w note to bugs section of pod
# changes/bugs fixed since 31dec94 version -dmr:
#  - podified
#


# dprofpp - display perl profile data
#  31oct95
#
# changes/bugs fixed since 7oct95 version -dmr:
#  - PL'd
# changes/bugs fixed since 5apr95 version -dmr:
#  - touch up handling of exit timestamps.
#  - suggests -F when exit timestamps are missing.
#  - added compressed execution tree patches from AchimB, put under -t.
#      now -z is the default action; user+system time.
#  - doc changes.
# changes/bugs fixed since 10feb95 version -dmr:
#  - summary info is printed by default, opt_c is gone.
#  - fixed some doc bugs
#  - changed name to dprofpp
# changes/bugs fixed since 03feb95 version -dmr:
#  - fixed division by zero.
#  - replace many local()s with my().
#  - now prints user+system times by default
#     now -u prints user time, -U prints unsorted.
#  - fixed documentation
#  - fixed output, to clarify that times are given in seconds.
#  - can now fake exit timestamps if the profile is garbled.
# changes/bugs fixed since 17jun94 version -dmr:
#  - podified.
#  - correct old documentation flaws.
#  - added AndyD's patches.
#