[perl #60692] Recently introduced slowness

# New Ticket Created by  (Andreas J. Koenig) 
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According to examples/benchmarks/primes2.pir there was a nearly 30x
slowdown in the last weeks. Two random data points:

https://svn.perl.org/parrot/trunk@31633 was fast (~ 8 secs)
https://svn.perl.org/parrot/trunk@32918 was slow (> 220 secs)

Between the two I found too many segfaults and gave up on bisecting.

Let me know if you need further data.

-- 
andreas


Summary of my parrot 0.8.1 (r0) configuration:
  configdate='Thu Nov 20 03:48:08 2008 GMT'
  Platform:
    osname=linux, archname=x86_64-linux-gnu-thread-multi
    jitcapable=0, jitarchname=nojit,
    jitosname=linux, jitcpuarch=amd64
    execcapable=0
    perl=/usr/bin/perl
  Compiler:
    cc='cc', ccflags='-D_REENTRANT -D_GNU_SOURCE -DDEBIAN  -pipe -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -DHASATTRIBUTE_CONST  -DHASATTRIBUTE_DEPRECATED  -DHASATTRIBUTE_MALLOC  -DHASATTRIBUTE_NONNULL  -DHASATTRIBUTE_NORETURN  -DHASATTRIBUTE_PURE  -DHASATTRIBUTE_UNUSED  -DHASATTRIBUTE_WARN_UNUSED_RESULT  -falign-functions=16 -fvisibility=hidden -maccumulate-outgoing-args -W -Wall -Waggregate-return -Wcast-align -Wcast-qual -Wchar-subscripts -Wcomment -Wendif-labels -Wextra -Wformat -Wformat-extra-args -Wformat-nonliteral -Wformat-security -Wformat-y2k -Wimplicit -Wimport -Winit-self -Winline -Winvalid-pch -Wlogical-op -Wmissing-braces -Wmissing-field-initializers -Wno-missing-format-attribute -Wmissing-include-dirs -Wpacked -Wparentheses -Wpointer-arith -Wreturn-type -Wsequence-point -Wno-shadow -Wsign-compare -Wstrict-aliasing -Wstrict-aliasing=2 -Wswitch -Wswitch-default -Wtrigraphs -Wundef -Wunknown-pragmas -Wno-unused -Wvariadic-macros -Wwrite-stri!
 ngs -Wbad-function-cast -Wc++-compat -Wdeclaration-after-statement -Werror=declaration-after-statement -Wimplicit-function-declaration -Wimplicit-int -Wmain -Wmissing-declarations -Wmissing-prototypes -Wnested-externs -Wnonnull -DHAS_GETTEXT',
  Linker and Libraries:
    ld='cc', ldflags=' -L/usr/local/lib',
    cc_ldflags='',
    libs='-ldl -lm -lpthread -lcrypt -lrt -lgmp -lreadline -lglut -lGLU -lGL -lcrypto '
  Dynamic Linking:
    share_ext='.so', ld_share_flags='-shared -O2 -g -L/usr/local/lib -fPIC',
    load_ext='.so', ld_load_flags='-shared -O2 -g -L/usr/local/lib -fPIC'
  Types:
    iv=long, intvalsize=8, intsize=4, opcode_t=long, opcode_t_size=8,
    ptrsize=8, ptr_alignment=1 byteorder=12345678, 
    nv=double, numvalsize=8, doublesize=8